Cited by 64Anxiety, Depression, Psychometrics, Treatment, Cognitive ProcessesMemory and Neural MechanismsPsychotherapy Techniques and Applications

Enhancing Inhibitory Learning: The Utility of Variability in Exposure

Open access
Knowles, Kelly A., Olatunji, Bunmi O.·2019·Cognitive and Behavioral Practice

Abstract

Exposure therapy has strong empirical support as a treatment for anxiety and related disorders, yet not all participants see clinically meaningful reduction in symptoms, and some experience return of fear. In this review, we examine the theoretical models of exposure therapy, from early precursors to the contemporary inhibitory learning model. The inhibitory learning model is applied to examine one potential method of improving outcomes in exposure therapy: increasing variability in the progression of the exposure hierarchy. We explore mechanisms that support the use of variability in exposure, including the violation of expectancies to enhance learning. In addition, the role of intolerance of uncertainty in anxiety is examined; variable exposure therapy could target this transdiagnostic mechanism in anxiety and related disorders. Suggestions for future research are then offered. © 2018

AI snapshot

Written from the paper’s full text.

TL;DR

This review argues that increasing variability in exposure—stimulus, context, or hierarchy order—may strengthen inhibitory learning and target intolerance of uncertainty more effectively than traditional graded exposure. It synthesizes historical and contemporary exposure models and offers hypothetical adult case examples, while noting that direct tests of variable hierarchy progression remain limited.

Key findings

  • The inhibitory learning model reframes exposure as forming new safety associations rather than relying on habituation; fear need not decline during exposure for learning to occur.
  • Two studies directly examined variable hierarchy progression: in height-fearful college students, variable and graded exposure produced similar height-fear reductions, but variable exposure yielded greater reductions on the Beck Anxiety Inventory (Lang & Craske, 2000); in contamination-fearful students, both conditions improved, and greater within-session variability in subjective fear predicted lower follow-up fear (Kircanski et al., 2012).
  • Higher emotional variability during exposure predicted greater fear reduction at one-week follow-up in public-speaking fear (Culver et al., 2012), and multiple-context exposure reduced renewal/return of fear relative to single-context exposure in spider and snake phobia laboratory studies.
  • High intolerance of uncertainty is linked to poorer threat-safety discrimination and slower extinction, and is described as transdiagnostic across anxiety and depression; variable exposure is proposed to increase tolerance of uncertainty, though this remains untested.

Methods

  • Narrative review, not an empirical study; traces exposure theory from systematic desensitization, flooding, modeling, and emotional processing to the inhibitory learning model.
  • Synthesizes prior experimental and clinical findings on variability in exposure stimuli, contexts, and hierarchy order, including studies with college-student analogue samples and specific phobia, contamination, and public-speaking fears.
  • Presents hypothetical case examples of variable exposure for adult clients with driving phobia, contamination-based OCD, and social anxiety; no new data or formal meta-analysis.

Limitations

  • The authors state that research is needed to test whether random variable exposure outperforms graded exposure, whether increased uncertainty tolerance mediates anxiety treatment, and whether variable exposure can increase uncertainty tolerance; they also call for examination of moderators such as age and possible differences between fear- and disgust-based disorders.
  • The paper states that adults are the primary focus and that child applications need more research; it also notes that the case examples involve motivated adults, which may not generalize to less motivated clients or children.
  • Evident from the text: the proposal is largely theoretical and supported by indirect or analogue evidence, with only two studies directly examining hierarchy variability and no definitive test of the mechanism or clinical superiority.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1016/j.cbpra.2017.12.001

Cites

161 of 161 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

26 of 84 cited sources checked · 12 supported · 1 flagged · accuracy not yet measured

  • Premisecitation

    People high in intolerance of uncertainty do not discriminate between threat and safety cues during fear acquisition.

    “Two recent studies have demonstrated that individuals with high intolerance of uncertainty do not discriminate between threat and safety cues during fear acquisition and have slower fear extinction than those with low intolerance of uncertainty (Morriss, Macdonald, & van Reekum, 2016; Morriss, Christakou, & van Reekum, 2016).”
    Quote in the paperSubstantial claim2 of 2 sources checked
    • cites Morriss, Macdonald, & van Reekum, 2016 source
    • cites Morriss, Christakou, & van Reekum, 2016 source

      The Discussion reports no evidence that intolerance of uncertainty predicted differential responses to threat and safety cues during fear acquisition. It says high-IU individuals did not generalize fear to safety cues during acquisition under the study’s 100% reinforcement schedule; the reported generalization occurred during extinction, not acquisition. (LLM, conf=0.91)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
  • Premisecitation

    Some individuals experience a return of fear following exposure therapy.

    “some experience return of fear”
    Quote in the paperSubstantial claim2 of 3 sources checked
    • cites Eisen et al., 2013 source

      The Results section (page unavailable) reports that 49 of 83 participants with OCD who achieved remission subsequently relapsed, supporting the general idea that symptoms can return. It does not identify the returning symptoms as fear or establish that relapse followed exposure therapy; the Methods section says treatment effects were not comprehensively analyzed. (LLM, conf=0.83)

      Experimental — accuracy not yet measured
    • cites Simpson, Franklin, Cheng, Foa, & Liebowitz, 2005 source

      The Description of the Sample reports that some patients relapsed after exposure and ritual prevention, with relapse defined as a return to pretreatment OCD severity. The paper does not establish that fear specifically returned; it measures OCD symptoms and clinical severity. (LLM, conf=0.82)

      Experimental — accuracy not yet measured
    • cites Vervliet, Craske, & Hermans, 2013 source
  • Premisecitation

    Variability in context and stimuli is important for generalizing learning to novel situations and stimuli.

    “Context and stimulus variability appear to be key in the generalization of learning, which allows clients to apply what they have learned to new contexts and new stimuli that were not encountered during exposure therapy (Craske et al., 2014; Kircanski et al., 2012).”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites Craske et al., 2014 source
    • cites Kircanski et al., 2012 source
  • Premisecitation

    Exposure therapy is well supported empirically as a treatment for anxiety and related disorders.

    “Exposure therapy has strong empirical support as a treatment for anxiety and related disorders”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites Abramowitz, 1996 source
    • cites Foa & McLean, 2016 source
  • Premisecitation

    Some individuals do not achieve clinically meaningful symptom reduction from exposure therapy.

    “yet not all participants see clinically meaningful reduction in symptoms”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites Foa, Liebowitz, et al., 2005 source
    • cites Jacoby & Abramowitz, 2016 source
  • May combine two claims. 37
  • Classified as probably not a substantial claim. 40
  • May combine two claims.

    Premisecitation

    Emotional states serve as powerful retrieval cues, and varying fear may make the safety association more salient.

    “Emotional states are strong retrieval cues, and variation in fear may increase the salience of the association between a previously feared object or situation and a lack of extreme negative consequences (Bjork & Bjork, 1992, 2006; Craske et al., 2014).”
    Quote in the paperSubstantial claim1 of 3 sources checked
    • cites Bjork & Bjork, 1992

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Bjork & Bjork, 2006

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Craske et al., 2014 source

      In “Therapeutic Strategies,” section (5) Variability (page unavailable), the paper proposes that fear level may serve as a retrieval cue and that varying it may enhance learning of inhibitory associations. It does not establish that emotional states are strong retrieval cues; it also describes increased salience of the feared stimulus, not specifically of the safety association. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Improving distress tolerance is a central aim of CBT and ACT.

    “Notably, increased emotional distress tolerance is a key goal of several behavioral therapies, including cognitive-behavioral therapy (CBT) and acceptance and commitment therapy (ACT; Hayes, Strosahl, & Wilson, 1999; Leyro, Zvolensky, & Bernstein, 2010).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites Hayes, Strosahl, & Wilson, 1999

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Leyro, Zvolensky, & Bernstein, 2010 source

      The Abstract (page not available) says that many behavioral therapies target distress tolerance directly or indirectly and explicitly names ACT and mindfulness-based cognitive therapy. It does not establish that improving distress tolerance is a key goal of CBT generally; the listed cognitive therapy is a more specific approach. (LLM, conf=0.85)

      Experimental — accuracy not yet measured
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The amygdala is a key brain structure in fear conditioning and extinction.

    “which is a key brain structure involved in fear conditioning and extinction (Davis, 1992; Etkin & Wager, 2007; Myers & Davis, 2007; Phillips & Ledoux, 1992)”
    Quote in the paperNot a substantial claim1 of 3 sources checked
    • cites Davis, 1992 source
    • cites Etkin & Wager, 2007 source

      The Results section (page unavailable) reports increased amygdala activity during fear conditioning, supporting that part of the claim. The Discussion section on emotion regulation and fear extinction (page unavailable) instead emphasizes the ventromedial prefrontal cortex and its inhibitory projections to the amygdala; it does not establish the amygdala itself as a key structure in extinction. (LLM, conf=0.83)

      Experimental — accuracy not yet measured
    • cites Myers & Davis, 2007 source
  • May combine two claims.

    Premisecitation

    Intolerance of uncertainty is considered a transdiagnostic factor across anxiety and depression and a major potential treatment target.

    “Intolerance of uncertainty is now considered a transdiagnostic factor across anxiety and depression (Carleton et al., 2012; McEvoy & Mahoney, 2011) and is a major potential target for treatment (Boswell, Thompson-Hollands, Farchione, & Barlow, 2013; Einstein, 2014; McEvoy & Erceg-Hurn, 2016).”
    Quote in the paperSubstantial claim1 of 3 sources checked
    • cites Carleton et al., 2012 source
    • cites McEvoy & Mahoney, 2011 source
    • cites Boswell, Thompson-Hollands, Farchione, & Barlow, 2013 source
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Inhibitory learning mechanisms have been suggested to play a role in fear extinction for children with anxiety disorders as well as adults.

    “Inhibitory learning mechanisms have been suggested to play a role in fear extinction for children with anxiety disorders as well as adults (McGuire, Orr, Essoe et al., 2016; McGuire, Orr, Wu et al., 2016), but more research examining the inhibitory learning model in exposure with children is needed.”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites McGuire, Orr, Essoe et al., 2016 source
    • cites McGuire, Orr, Wu et al., 2016

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    SUDS are not typically part of the inhibitory learning model because that model does not emphasize habituation.

    “SUDS are not typically part of the inhibitory learning model, as there is no emphasis on habituation (Craske et al., 2014).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Craske et al., 2014 source

      The “Inhibitory Learning vs Habituation” section says inhibitory-learning strategies do not emphasize fear reduction during exposure, supporting the claim’s rationale. It does not say SUDS are typically absent; the PTSD case study even describes a hierarchy containing distress ratings. The source therefore supports the lack of emphasis on habituation, but not the generalization about SUDS. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
  • May combine two claims.

    Premisecitation

    A general fear of the unknown is common in young children, especially behaviorally inhibited children, and may serve an adaptive purpose of avoiding danger when vulnerable or without a protective caretaker.

    “A general fear of the unknown is common in young children, especially behaviorally inhibited young children (Kagan & Snidman, 2004), and may serve an adaptive purpose of avoiding danger when vulnerable or in the absence of a protective caretaker (Bowlby, 1973; Carleton, 2016).”
    Quote in the paperNot a substantial claim1 of 3 sources checked
    • cites Kagan & Snidman, 2004

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Bowlby, 1973
    • cites Carleton, 2016 source
  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).

    Interpretationcitation

    Variability might be introduced after a few graded, lower-difficulty exposures once the client has gained confidence in staying in the distressing situation.

    “Instead of starting exposure with the premise of random progression through the exposure hierarchy, variability might be introduced after a few graded exposures of lower difficulty once the client has gained confidence in his or her ability to stay in the distressing situation (Craske et al., 2014).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Craske et al., 2014 source

      The “Variability” section (page not provided) says variable exposure usually begins with the least anxiety-producing hierarchy item to avoid treatment refusal. It does not recommend several graded, lower-difficulty exposures before introducing variability, or make the client’s confidence in staying in the situation the criterion for doing so. (LLM, conf=0.86)

      Experimental — accuracy not yet measured
    • Rests on an assumption: Variable exposure can be delivered in clinical practice without unacceptable harm when unnecessary risks are avoided.
  • May combine two claims.

    Premisecitation

    Helping clients avoid difficult exposures can be harmful and can increase the likelihood of relapse.

    “In fact, helping clients avoid difficult exposures can be harmful and increase the likelihood of relapse (Gillihan, Williams, Malcoun, Yadin, & Foa, 2012).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Gillihan, Williams, Malcoun, Yadin, & Foa, 2012 source
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationcitation

    Since disgust habituates more slowly than fear, variable exposure may have weaker effects on contamination fear than on other phobias.

    “Because disgust habituates more slowly than fear (McKay, 2006; Smits, Telch, & Randall, 2002), it is possible that the effects of variable exposure on contamination fear, in which disgust is a key component, may be weaker than its effects on other phobias.”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites McKay, 2006 source
    • cites Smits, Telch, & Randall, 2002 source
  • May combine two claims.

    Interpretationreasoning

    Unpredictable item selection in an exposure hierarchy may both aid fear tolerance and increase external validity.

    “The unpredictability of varying the items on an exposure hierarchy creates a treatment context that not only facilitates fear tolerance but also has more external validity.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Premisecitation

    The inhibitory learning model holds that forming new associations between feared stimuli and safety is central to extinction.

    “this model asserts that learning new associations between feared objects or situations and a lack of objective danger is central to fear extinction”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Craske et al., 2008 source
  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation

    Original fear memories persist while new inhibitory CS-US associations are acquired and strengthened.

    “the original fear learning remains intact, but new inhibitory associations between the conditioned stimulus (CS) and the unconditioned stimulus (US) are formed and strengthened (Bouton, 1993)”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Bouton, 1993 source
  • May combine two claims.

    Premisecitation

    Variability improves memory storage and provides extra retrieval cues.

    “It is suggested that variability enhances the storage capacity for new information and creates additional cues for memory retrieval (Bjork & Bjork, 1992, 2006; Estes, 1955).”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites Bjork & Bjork, 1992
    • cites Bjork & Bjork, 2006

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Estes, 1955 source
  • Classified as probably not a substantial claim.

    Premisecitation

    The inhibitory learning model has been proposed as an alternative account of how exposure works.

    “The inhibitory learning model has been proposed as an alternative explanation for the mechanisms of exposure (Craske et al., 2008).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Craske et al., 2008 source
  • Classified as probably not a substantial claim.

    Premisecitation

    The inhibitory learning model proposes that exposure does not necessarily reduce fear but instead teaches greater fear tolerance.

    “According to the inhibitory learning model, fear is not necessarily reduced in exposure; rather, an increased tolerance of fear is learned (Craske et al., 2008).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Craske et al., 2008 source
  • May combine two claims.

    Interpretationcitation

    Variable exposure appears no less effective than standard exposure and may improve generalization of fear learning.

    “These initial findings indicate that variable exposure is at least as effective as standard exposure, with variable exposure potentially leading to increased generalization in fear learning.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    In contamination-fearful college students, both standard and variable exposure reduced contamination fear, obsessions and compulsions, and subjective fear from pre- to post-treatment.

    “In a study of college students with contamination fear, participants in both the standard and variable exposure groups had decreases in contamination fear, obsessions and compulsions, and subjective fear ratings during exposure from pre- to post-treatment (Kircanski et al., 2012).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Kircanski et al., 2012 source
  • Classified as probably not a substantial claim.

    Interpretationreasoning

    Exposure therapy aims to make the inhibitory safety association stronger than the original fear association.

    “The goal of exposure therapy, therefore, is to strengthen this inhibitory association so that it becomes stronger than the original excitatory fear association (Figure 1).”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Intolerance of uncertainty was first conceptualized as a key component of worry and is especially relevant to generalized anxiety disorder.

    “Although intolerance of uncertainty was originally conceptualized as a key component underlying worry, and therefore is especially relevant in generalized anxiety disorder (GAD; Freeston, Rheaume, Letarte, Dugas, & Ladouceur, 1994; Ladouceur et al., 2000)”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Freeston, Rheaume, Letarte, Dugas, & Ladouceur, 1994 source
    • cites Ladouceur et al., 2000 source
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisereasoning

    Greater tolerance of negative emotions is crucial for reducing functional impairment.

    “Increasing tolerance of negative emotional experiences is key to reducing functional impairment, as distressed clients learn how to cope with their emotional and physiological responses to stress and return to activities they had previously avoided.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    When exposure happens in constrained and predictable conditions, learning becomes tied to the therapy context and does not always transfer to other settings.

    “When exposure occurs under conditions that are constrained and predictable, learning tends to be contextualized.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Bouton, 1993 source
  • May combine two claims.

    Premisecitation

    Intensive interoceptive exposure outperformed standard interoceptive exposure for panic disorder, with effects mediated by greater fear tolerance and expectancy violation.

    “An experimental examination of intensive interoceptive exposure for panic disorder demonstrated that intensive interoceptive exposure was more effective than standard interoceptive exposure, which was fully mediated by improvement in fear toleration and violation of the expectation of negative outcomes (Deacon et al., 2013).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Deacon et al., 2013 source
  • May combine two claims.

    Premisecitation

    Initial fear activation, within-session habituation, and between-session habituation are not required for learning in exposure.

    “Additionally, a thorough review of the evidence suggests that emotional processing theory’s indices of learning (initial fear activation, within-session habituation, and between-session habituation) are not necessary for learning to occur (Craske et al., 2008).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Craske et al., 2008 source
  • Classified as probably not a substantial claim.

    Premisecitation

    Expectancy violation rests on the idea that a mismatch between expected and actual outcomes is essential for learning.

    “Expectancy violation is based on the premise that incongruence between an expected outcome and the actual outcome is critical for learning (Rescorla & Wagner, 1972; Schultz & Dickinson, 2000).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Rescorla & Wagner, 1972

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Schultz & Dickinson, 2000 source
  • May combine two claims.

    Premisecitation

    One-session treatment for specific phobias yields outcomes comparable to five sessions, with gains maintained up to four years.

    “One-session treatment of flying phobia, blood-injection-injury phobia, spider phobia, claustrophobia, and other specific phobias has shown comparable outcomes to five-session treatment, with clinically significant improvements maintained for follow-up periods as long as four years (Öst, Alm, Brandberg, & Breitholtz, 2001; Öst, Brandberg, & Alm, 1997; Öst, Hellström, & Kåver, 1992).”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites Öst, Alm, Brandberg, & Breitholtz, 2001 source
    • cites Öst, Brandberg, & Alm, 1997 source
    • cites Öst, Hellström, & Kåver, 1992 source
  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationnone given

    The inhibitory learning approach suggests there may be value in a more variable approach to progressing through the fear hierarchy for some clients, along with variability in stimuli and context.

    “Although traditional approaches to exposure therapy have called for gradual progression though the fear hierarchy, the inhibitory learning approach suggests that there may be value in a more variable approach to progressing through the fear hierarchy for some clients, along with the introduction of variability in other aspects of exposure including stimuli and context.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: The mechanisms of fear extinction and inhibitory learning observed in laboratory conditioning paradigms operate in clinical exposure therapy.
  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationreasoning

    Exposure lets clients learn that feared situations are not harmful and that they can tolerate increased anxiety.

    “Exposure allows clients to learn that feared situations are not harmful, and that they can tolerate increased anxiety.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Interpretationnone given

    For clients with social anxiety, attempting a presentation without prior practice may lead to negative evaluation from peers, although the result is unlikely to be as disastrous as these clients predict.

    “For clients with social anxiety, attempting to give a presentation at work or school without any prior practice may lead to negative evaluation from their peers, although the result is unlikely to be as disastrous as might be predicted by these individuals.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing). May combine two claims.

    Interpretationreasoning

    Working on basic social skills may be necessary before exposure, but repeating skill-building exercises without exposure to feared situations is unlikely to benefit a socially anxious client.

    “Working on basic social skills may be necessary before exposure, but repeating skill-building exercises over and over is unlikely to benefit a socially anxious client without some exposure to feared situations.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

    Interpretationreasoning

    A client's experience of high anxiety is not in itself problematic, and clients should not necessarily expect anxiety to decrease during exposure after psychoeducation on the inhibitory learning model.

    “A client’s experience of high anxiety is not in itself problematic, as therapists can emphasize the importance of tolerating anxiety, and clients should not necessarily expect their anxiety to decrease during exposure after receiving psychoeducation on the inhibitory learning model.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationreasoning

    If intolerance of uncertainty is stable and does not change over treatment, it may be a moderator rather than a mediator, and people high in intolerance of uncertainty might benefit more from learning uncertainty-no negative consequence associations in variable exposure than people lower in intolerance of uncertainty.

    “If intolerance of uncertainty is a more stable construct and does not change over the course of treatment, it may be a moderator of treatment outcomes instead of a mediator; individuals with high intolerance of uncertainty might experience additional benefit from learning associations between uncertainty and a lack of negative consequences in variable exposure compared to individuals with lower”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Effective exposure treatment involves desirable difficulties.

    “Emphasizing that effective exposure treatment involves desirable difficulties (Bjork, 1994; Craske et al., 2008; Jacoby & Abramowitz, 2016) may help clients understand that exposure is not an easy task, but tolerating discomfort and arousal and working together to attempt challenges are some of the principal goals of therapy.”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Bjork, 1994 source
    • cites Craske et al., 2008 source
    • cites Jacoby & Abramowitz, 2016 source

      Checked before — its earlier verdict is held back until a new check runs.

  • May combine two claims.

    Interpretationreasoning

    A child who is constantly overprotected has limited experience with uncertainty and cannot learn that uncertainty is not inherently dangerous; avoidance prevents fear extinction and maintains long-term anxiety.

    “A child who is constantly overprotected has limited experience with uncertainty and therefore cannot learn that uncertainty is not inherently dangerous, just as avoidance prevents fear extinction (or new inhibitory fear learning) and maintains long-term anxiety.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based). May combine two claims.

    Interpretationreasoning

    Separating fear and uncertainty SUDS may help some clients see that their distress is partly due to uncertainty, which can motivate them to increase tolerance of uncertainty as well as fear.

    “Separating these concepts may help some clients realize that the distress they feel is partly due to uncertainty, providing motivation to increase tolerance of uncertainty as well as fear.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationown data

    All the case examples involve motivated adults, which may make them less useful for exposure therapy with children brought by their parents.

    “Finally, all of our case examples involve adults who are motivated to complete exposure therapy, which may be less useful for conducting exposure therapy with children who are there at the behest of their parents.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    Variable exposure may increase tolerance of uncertainty by promoting inhibitory learning and approach behavior in uncertain real-world situations, which could improve treatment outcomes.

    “Variable exposure may increase tolerance of uncertainty by promoting inhibitory learning and increasing approach behavior in uncertain, real-world situations, which could potentially result in better treatment outcomes.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: The mechanisms of fear extinction and inhibitory learning observed in laboratory conditioning paradigms operate in clinical exposure therapy.
  • May combine two claims.

    Interpretationreasoning

    In exposure therapy, clients learn new associations between uncertainty and a lack of inherent danger and learn to tolerate anxiety in uncertain situations.

    “In exposure therapy, the client learns new associations between uncertainty and a lack of inherent danger, and they learn to tolerate their anxiety even in uncertain situations.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationnone given

    Some clients may resist variable exposure even after thorough psychoeducation about variability and the inhibitory learning model.

    “Like Matthew, some clients may be resistant to the idea of variable exposure, even after thorough psychoeducation on the benefits of variability in exposure and the inhibitory learning model.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based).

    Interpretationnone given

    Variability may benefit the client.

    “Variability may benefit the client, but as with traditional exposure, the process of implementing the intervention should always be a collaborative effort between client and therapist.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: Variable exposure can be delivered in clinical practice without unacceptable harm when unnecessary risks are avoided.
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    Randomly selected difficult exposure items may potentially induce very high anxiety in clients.

    “Randomly-selected difficult exposure items may potentially induce very high anxiety in clients.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationnone given

    Resistance to variable exposure may lead to a rupture in the therapeutic alliance or to treatment drop-out if it is not properly addressed.

    “This resistance may lead to a rupture in the therapeutic alliance or even treatment drop-out if not properly addressed.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationnone given

    People high in intolerance of uncertainty may be especially likely to generalize learned threat when uncertain, which then weakens fear extinction learning.

    “Those high in intolerance of uncertainty may be especially prone to generalizing learned threat when uncertain, which then compromises fear extinction learning.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing). May combine two claims.

    Interpretationnone given

    Clients with high distress tolerance could probably adjust to random exposure hierarchy progression without much difficulty, while clients with low distress tolerance may need a more graded approach.

    “Clients with high distress tolerance could probably adjust to random exposure hierarchy progression without much difficulty, while clients with low distress tolerance may need a more graded approach.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: Variable exposure can be delivered in clinical practice without unacceptable harm when unnecessary risks are avoided.
  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing). May combine two claims.

    Interpretationnone given

    Some level of resistance is common and can usually be worked through by reminding clients of the treatment rationale and their own motivations for treatment.

    “Although the therapist should certainly not force the client to complete an exposure exercise (Abramowitz, Deacon, & Whiteside, 2011), some level of resistance is common and can usually be worked through by reminding clients of the treatment rationale and their own motivations for treatment.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    People can acquire high intolerance of uncertainty by observing caregivers' fear and avoidance of uncertain events or by being punished for entering uncertain situations.

    “Individuals can also acquire high intolerance of uncertainty through observational learning of others’ (particularly caregivers’) fear and avoidance of uncertain events, or by being punished for venturing out into uncertain situations.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    Clients could be expected to learn through exposure that uncertainty itself is not harmful and can be tolerated.

    “Similarly, clients could be expected to learn through exposure that uncertainty itself is not harmful and can be tolerated.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Interpretationreasoning

    Parental reassurance is counterproductive and prevents direct exposure to the actual fear.

    “In particular, therapists will need to make it clear to parents that providing reassurance (“I promise we’ll start with an easy item first when we do this at home”; “Nothing bad will happen when you do your homework”) is counterproductive and prevents direct exposure to the actual fear.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    Intolerance of uncertainty is only one process that may help explain the potentially beneficial effects of a variable approach to progressing through the fear hierarchy.

    “It is important to note that intolerance of uncertainty is just one process that may be useful in explaining the potentially beneficial effects of a variable approach to progressing through the fear hierarchy.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationnone given

    People with very high intolerance of uncertainty may be unable to handle variable exposure and may prefer a graded approach or be unwilling to agree to treatment.

    “Alternatively, individuals with very high intolerance of uncertainty may be unable to handle variable exposure and may prefer a graded approach to exposure or otherwise be unwilling to agree to treatment.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Interpretationcitation

    Exposure is unlikely to be the only component of a client's therapy, and variability is not the only exposure aspect that can be adapted to improve inhibitory learning.

    “Finally, exposure is unlikely to be the sole component of a client’s therapy, and variability is not the only aspect of exposure that can be adapted to improve inhibitory learning.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Interpretationnone given

    This parental behavior is common and interferes with a child's learning to tolerate uncertainty.

    “This parental behavior is common and interferes with a child’s learning to tolerate uncertainty.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    These associations are strengthened through practice, and variable exposure may allow for additional, more generalized learning.

    “These associations are strengthened through practice, and variable exposure may allow for additional, more generalized learning.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationreasoning

    Difficult exposures are not necessarily dangerous.

    “However, difficult exposures are not necessarily dangerous.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: Variable exposure can be delivered in clinical practice without unacceptable harm when unnecessary risks are avoided.
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Premisenone given

    Driving an unfamiliar vehicle is a task many people must do at some point and very rarely results in a car accident.

    “Driving an unfamiliar vehicle is a task that many individuals must do at some point in their lives and very rarely results in a car accident.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Interpretationreasoning

    Clients may refuse to attempt difficult exposures initially or may want to end a distressing exposure immediately.

    “However, clients in these situations may refuse to attempt difficult exposures initially, or they may want to end a distressing exposure immediately.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    Violating client expectancies during therapy is typically beneficial for learning.

    “While violating client expectancies during therapy is typically beneficial for learning, therapists need to be careful in planning exposure exercises to avoid unnecessary failures.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Interpretationnone given

    Successful treatment is marked by being able to do exposures even while distressed, not necessarily by a reduction in distress.

    “Clients should be reminded, however, that successful treatment is marked by the ability to do exposures even when distressing, not necessarily in the reduction of distress.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based). May combine two claims.

    Interpretationnone given

    Anxious children might be more unwilling to accept a challenging exposure right away, and emphasizing variability in exposure stimuli or context might be more practical than introducing a variable hierarchy progression.

    “Anxious children might be more unwilling to accept the possibility of completing a challenging exposure right away, and emphasizing variability in the exposure stimuli or context might be more practical than introducing a variable hierarchy progression.”
    Quote in the paperNot a substantial claim
59 of 59
  • The paper relies on this without support.

    Intolerance of uncertainty is a transdiagnostic mechanism in anxiety and related disorders.

    “the role of intolerance of uncertainty in anxiety is examined; variable exposure therapy could target this transdiagnostic mechanism in anxiety and related disorders.”
  • The paper relies on this without support.

    Findings from laboratory analogue samples about multiple contexts and return of fear generalize to clinical exposure therapy for anxiety disorders.

    “These effects have also been demonstrated in the laboratory in analogue samples (Culver, Stoyanova, & Craske, 2011; Mineka, Mystkowski, Hladek, & Rodriguez, 1999; Rodriguez, Craske, Mineka, & Hladek, 1999; Vervliet et al., 2013).”
  • The paper relies on this without support.

    The mechanisms of fear extinction and inhibitory learning observed in laboratory conditioning paradigms operate in clinical exposure therapy.

    “In exposure therapy, the client learns new associations between uncertainty and a lack of inherent danger, and they learn to tolerate their anxiety even in uncertain situations.”
  • The paper relies on this without support.

    Variable exposure can be delivered in clinical practice without unacceptable harm when unnecessary risks are avoided.

    “The therapist has to be able to tolerate some uncertainty in the outcome of the exposure, as long as unnecessary risks are avoided.”
4 of 4

Cites

Flagged first, then by citations

11 of the 172 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. Foa, 1996, Mechanisms of change in exposure therapy, Current Controversies in the Anxiety Disorders, 329

Cited by

Sorted by citations

Authors
Knowles, K. A., & Olatunji, B. O.
Affiliations
Vanderbilt University (US)
Corresponding author
Knowles, Kelly A.
Venue
Cognitive and Behavioral Practice
Publisher
Elsevier BV
Published
2019-02
Volume
26
Issue
1
Pages
186-200
ISSN
1077-7229 (ISSN-L)
OpenAlex
W2789746080
Cited by
60
References
172
Citations by year
2026: 4 · 2025: 4 · 2024: 13 · 2023: 9 · 2022: 13 · 2021: 5 · 2020: 6 · 2019: 2 · 2018: 4
FWCI
5.57
Type
journal article
Language
en
Open access
Locations
  • Cognitive and Behavioral Practice (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Mental Health (T32MH018921)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Social Sciences › Psychology › Clinical Psychology › Psychotherapy Techniques and Applications
Keywords
exposure therapy, exposure hierarchy, intolerance of uncertainty, anxiety disorders, return of fear, transdiagnostic mechanisms, fear extinction

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-09-28.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-09-28.

Cited sources are checked by gpt-6-sol.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

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