Neurocognition in children with cognitive disengagement syndrome: accurate but slow
Open accessAbstract
Cognitive disengagement syndrome (CDS), previously termed sluggish cognitive tempo (SCT), is characterized by excessive daydreaming, mental confusion, and slowed behavior or thinking. Prior research has found inconsistent relations between CDS and neurocognition, though most studies have used small or ADHD-defined samples, non-optimal measures of CDS, and/or examined limited neurocognitive domains. Accordingly, this study examined the association of parent- and teacher-reported CDS symptoms using a comprehensive neurocognitive battery in a sample of 263 children (aged 8-12) selected with a range of CDS symptomatology. Parents and teachers provided ratings of CDS and ADHD inattentive (ADHD-IN) symptoms. Path analyses were conducted to examine CDS and ADHD-IN as unique predictors of neurocognitive functioning after covarying for age, sex, and family income. CDS symptoms were uniquely associated with slower performance across a range of cognitive domains, including verbal inhibition, rapid naming/reading, planning, divided attention, and set shifting. In contrast, ADHD-IN symptoms were uniquely associated with poorer performance on a Go/NoGo task (inhibition/distractibility), visual scanning and discrimination, and interference control. Findings from the current study, amongst the first to recruit children based on levels of CDS symptomatology, provide the strongest evidence to date that the neurocognitive phenotype of CDS is characterized by slowed cognitive processing, and add to its validity as a separate syndrome from ADHD. If replicated, these findings have implications for assessment, treatment, and school accommodations for CDS. Neuroimaging studies exploring the neurobiological basis of CDS are also needed.
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- Findingown data
CDS and ADHD-IN composites correlated .807 (p<.001) after covarying age, sex, and income.
“The CDS and ADHD-IN composite scores were significantly correlated (r=.807, p<.001) when covarying age, sex, and income.”
Quote in the paperNot a substantial claim - Findingown data
After covarying sex, age, and income, both ADHD-IN and CDS were independently linked to WISC-IV Coding and working memory.
“After covarying sex, age, and income, both ADHD-IN and CDS were independently associated with WISC-IV Coding and WM.”
Quote in the paperSubstantial claim - Findingown data
CDS showed no association with response inhibition.
“CDS was not associated with planning accuracy, cognitive interference accuracy, or response inhibition.”
Quote in the paperSubstantial claim - Findingown data
CDS showed no association with planning accuracy.
“CDS was not associated with planning accuracy, cognitive interference accuracy, or response inhibition.”
Quote in the paperSubstantial claim - Findingown data
The study found no association between CDS and Grooved Pegboard.
“It should also be noted that we did not find an association between CDS and Grooved Pegboard, which we expected given previous work reporting such an association in adolescents with ADHD [12].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [12] source
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- Findingown data
When both ADHD-IN and CDS were included in the models, only ADHD-IN was uniquely related to Go/NoGo accuracy and omissions.
“In fact, we found that GNG accuracy and omissions were uniquely associated with ADHD-IN when including both ADHD-IN and CDS in the models.”
Quote in the paperSubstantial claim - Findingown data
The CDS-related slowing was not attributable to anxiety or IQ.
“This slowing was not due to anxiety or IQ (Tables S3 and S4).”
Quote in the paperSubstantial claim - Findingown data
CDS showed no association with cognitive interference accuracy.
“CDS was not associated with planning accuracy, cognitive interference accuracy, or response inhibition.”
Quote in the paperSubstantial claim - Findingown data
The Coding pattern was seen for both parent- and teacher-reported CDS.
“Our pattern of findings for Coding was observed for both parent-and teacher-reported CDS (see Tables S1 and S2).”
Quote in the paperSubstantial claim - Findingown data
CDS was associated with working memory deficits.
“In addition to slowed cognitive processing, we also found evidence for CDS being associated with deficits in WM.”
Quote in the paperSubstantial claim - Premisecitation
CDS was less clearly linked than ADHD to problems with response inhibition, attentional variability, or working memory.
“Further, CDS was less clearly associated than ADHD with deficits in response inhibition, attentional variability, or WM [3].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [3] source
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- Premisecitation
CDS symptoms correlate with ADHD-IN symptoms.
“Although CDS symptoms are correlated with attention-deficit/hyperactivity disorder inattention (ADHD-IN) symptoms, a large and growing body of research supports the external and internal validity of CDS [2].”
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- Study design and conductcitation
The study controlled task impurity by using computerized tasks that differed in short-term memory modality (phonological vs visuospatial).
“We controlled for task impurity [41] by selecting computerized tasks that differed on short-term memory modality [phonological WM (PHWM) vs. visuospatial WM (VSWM)].”
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- Premisereasoning
Few studies have tested whether CDS is uniquely related to neurocognition in children spanning the full CDS symptom range.
“Further, few studies have examined whether CDS symptoms are uniquely associated with neurocognition among children recruited to represent the full range of CDS symptomatology.”
Quote in the paperSubstantial claim - Premisecitation
Not all ADHD-sample studies control for ADHD-IN.
“Moreover, in studies using ADHD samples, not all control for ADHD-IN [3].”
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- Study design and conductcitation
Factors other than the intended constructs probably influence performance on the neurocognitive tasks.
“Although we associated specific neurocognitive constructs with each task, cognitive factors other than those intended to be measured likely affect performance [62].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [62]
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- Premisecitation
Baytunca et al. found that in a multivariate model containing both Go/NoGo commissions and reaction time, only reaction time was linked to CDS.
“Baytunca et al. [60] reported that when including both GNG commissions and reaction time in a multivariate model, only reaction time was associated with CDS.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [60] source
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- Premisecitation
Computationally modeled working memory speed was associated with both parent- and teacher-rated CDS in children.
“Notably, computationally-modeled WM speed was associated with both parentand teacher-rated CDS in children [16], which may reflect delayed responding during WM tasks (possibly due to slower cognitive processing).”
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- Premisecitation
A closer look at studies connecting CDS to sustained attention/vigilance shows that in two of them, slowed reaction time drove the reported association.
“A closer examination of studies reporting an association of CDS with sustained attention/vigilance indicates that slowed reaction time contributed to the findings for two studies.”
Quote in the paperSubstantial claim0 of 2 sources checked - Premisecitation
Children with ADHD and high CDS levels show some resistance to stimulant medication treatment.
“Children with ADHD and high levels of CDS demonstrate some treatment resistance to stimulant medications [65,66]”
Quote in the paperSubstantial claim0 of 2 sources checked - Interpretationcitation
By excluding children on non-stimulant psychotropic medication, the study may have excluded a subset of the CDS population with insufficient stimulant response, limiting generalizability.
“specifically, we potentially excluded a subset of the CDS population who were prescribed non-stimulants due to insufficient response to stimulants.”
Quote in the paperNot a substantial claim - Interpretationcitation
The tasks showing the most CDS-related decrement involved a timed component, regardless of neurocognitive domain or executive control demands.
“Notably, the tasks with the most decrement related to CDS involved a timed component regardless of neurocognitive domain or amount of executive control required [46].”
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- Interpretationcitation
The findings suggest that, at least in children, slowed processing in CDS may reflect slowed cognitive processing rather than slowed motor responding.
“Our findings suggest that, at least for children, slowed processing in CDS may reflect slowed cognitive processing as opposed to slowed motor responding [10].”
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- Interpretationown data
The clear dissociation of ADHD-IN and CDS across neurocognitive constructs indicates that CDS is independently related to neurocognitive functioning.
“The marked dissociation of ADHD-IN and CDS with the various neurocognitive constructs indicate that CDS is independently associated with neurocognitive functioning.”
Quote in the paperSubstantial claim- Rests on an assumption: The neurocognitive tasks used in the study measure the intended neurocognitive constructs.
- Rests on an assumption: The parent and teacher ratings of CDS and ADHD-IN are valid measures of the respective symptom dimensions.
- Study design and conductown data
Findings were highly consistent when parent and teacher reports were examined separately.
“These findings remained remarkably consistent when examining parent and teacher report separately (see Tables S1 and S2).”
Quote in the paperNot a substantial claim - Interpretationreasoning
Evidence is growing that youth with higher CDS show Coding subtest deficits.
“Informant differences aside, there does seem to be growing evidence that youth with higher CDS display Coding subtest deficits.”
Quote in the paperSubstantial claim
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- May combine two claims. 45
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Findingown dataParent and teacher CDS ratings correlated .470, and parent and teacher ADHD-IN ratings correlated .452.
“For analyses, computed composite scores (mean of parent and teacher ratings) for CDS (parent/teacher correlation r = .470)and ADHD-IN (parent/teacher correlation r = .452)were used.”
Quote in the paperNot a substantial claimMay combine two claims.
Findingown dataADHD-IN did not correlate significantly with TEA-Ch DT, TMT-C Part A, DKEFS-Tower Mean First Move Time and Time per Move Ratio, or Grooved Pegboard.
“ADHD-IN was not significantly correlated with TEA-Ch DT, TMT-C Part A, DKEFS-Tower Mean First Move Time and Time per Move Ratio, or Grooved Pegboard.”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataADHD-IN correlated significantly with GNG accuracy, omissions, and commissions, TEA-Ch Time per Target and Attention, WISC-IV Coding and Symbol Search, TMT-C Part B, all four DKEFS-CWI conditions and Inhibition errors, DKEFS-Tower achievement, and working memory.
“ADHD-IN was significantly correlated with GNG accuracy, omissions, and commissions, TEA-Ch Time per Target and Attention, WISC-IV Coding and Symbol Search, TMT-C Part B, all four DKEFS-CWI conditions and Inhibition errors, DKEFS-Tower achievement, and WM (Table 3).”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataAfter covarying sex, age, and income, CDS was uniquely linked to slower performance on all three TEA-Ch scores, TMT-C Part B, all four DKEFS-CWI conditions (marginal for Inhibition/Switching), and DKEFS-Tower Mean First Move Time and Time per Move.
“After covarying sex, age, and income, CDS was uniquely associated with slower performance on all three TEACH scores, TMT-C Part B, all four DKEFS-CWI condition scores (marginal significance for DKEFS-CWI Inhibition/ Switching), DKEFS-Tower Mean First Move Times and Time per Move (see Table 4).”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataNeither CDS nor ADHD-IN was significantly linked to Grooved Pegboard dominant hand times.
“Neither CDS nor ADHD-IN were significantly associated with Grooved Pegboard dominant hand times.”
Quote in the paperNot a substantial claimMay combine two claims.
Findingown dataCDS correlated significantly with most neurocognitive measures, including GNG accuracy and omissions, TEA-Ch scores, WISC-IV Coding and Symbol Search, TMT-C Parts A and B, DKEFS-CWI conditions and Inhibition errors, DKEFS-Tower timing scores, Grooved Pegboard time, and working memory.
“CDS was significantly correlated with GNG accuracy, GNG omission errors, all three TEA-Ch scores, WISC-IV Coding and Symbol Search, TMT-C Parts A and B, all four DKEFS-CWI conditions and Inhibition errors, DKEFS-Tower Mean First Move Time and Time Per Move Ratio scores, Grooved Pegboard time, and WM (Table 3).”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataNeither CDS nor ADHD-IN was significantly linked to DKEFS-Tower Achievement or GNG commissions.
“Neither CDS nor ADHD-IN were significantly associated with DKEFS-Tower Achievement or GNG commissions.”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataADHD-IN was uniquely linked to WISC-IV Symbol Search, DKEFS-CWI Inhibition errors, GNG accuracy, and GNG omission errors.
“ADHD-IN was uniquely associated with WISC-IV Symbol Search, DKEFS-CWI Inhibition errors, GNG accuracy, and GNG omission errors (see Table 4).”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataCDS did not correlate significantly with GNG commission errors or DKEFS-Tower achievement.
“CDS was not significantly correlated with GNG commission errors or DKEFS-Tower achievement.”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataBoth CDS and ADHD-IN were independently linked to TMT-C Part A, with CDS linked to slower times and ADHD-IN to faster times.
“Both CDS and ADHD-IN were independently associated with TMT-C Part A, although in different directions (i.e., CDS symptoms were associated with slower TMT-Part A times, while ADHD-IN symptoms were associated with faster TMT-C Part A times).”
Quote in the paperSubstantial claimMay combine two claims.
FindingreasoningChildren with higher CDS were slower on both simple and complex tasks.
“Specifically, children with higher CDS were slower on both simple (e.g., TMT-C Part A) and more complex (e.g., Tower) tasks.”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataThe study found no evidence linking CDS to deficits in signal detection or in engaging/disengaging with stimuli.
“We did not find any evidence that CDS was associated with signal detection and stimulus engagement/disengagement deficits [3].”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataADHD-IN was uniquely linked to Symbol Search, while both CDS and ADHD were linked to Coding.
“Our results show that ADHD-IN is uniquely associated with Symbol Search, and that both CDS and ADHD are associated with Coding.”
Quote in the paperSubstantial claimClassified as probably not a substantial claim. May combine two claims.
PremisecitationCDS is marked by excessive daydreaming, mental confusion, and slowed behavior or thinking.
“Cognitive disengagement syndrome (CDS), previously termed sluggish cognitive tempo (SCT) [1], is characterized by excessive daydreaming, mental confusion, and slowed behavior/thinking.”
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PremisecitationCDS is uniquely linked to functional impairment such as anxiety, depression, academic problems, emotion dysregulation, and social impairment when ADHD is covaried.
“CDS is also uniquely associated with functional impairment, including anxiety, depression, academic problems, emotion dysregulation, and social impairment when covarying ADHD [2].”
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PremisecitationCDS symptoms cover both cognitive disengagement and motor hypoactivity/underactivity.
“CDS symptoms include both cognitive (disengagement of attention or effortful mental processing from external events/context/requirements) and motor (hypoactivity/underactivity, or high periods of sedentary movement) domains [1].”
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PremisecitationFindings differ by parent versus teacher informant, and CDS measurement varies.
“Other challenges include that there are discrepancies in findings based on the informant reporting on CDS (i.e., parent versus teacher) and variability in the measurement of CDS [2].”
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PremisecitationGrooved Pegboard measures motor speed and dexterity.
“This task measures motor speed and dexterity [39].”
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Study design and conductown dataBoth WISC-IV subtests load on the Processing Speed factor above .5.
“Both subtests load on the Processing Speed factor at >.5.”
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Study design and conductown dataThe eight working memory variables were reduced to one composite, explaining 61.04% of variance with loadings .52-.89.
“Thus, the 8 WM performance variables (4 blocks for each task) were reduced to a single WM indicator (i.e., composite score; 61.04% of variance explained; loadings = .52-.89).”
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Study design and conductcitationGrooved Pegboard test-retest reliability is good (.91 right hand, .85 left hand).
“Test-retest reliability is good (.91 for the right hand and .85 for the left hand) [38].”
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PremisecitationBarkley et al. found initial evidence that higher CDS is associated with impaired selective attention, with some but not all studies reporting this.
“they concluded that there was initial evidence for those with higher CDS to have impaired selective attention (i.e., challenges orienting and coupling attention to external events central to task performance, reflected by omission errors) as reported in several [2,[4][5][6][7], but not all [8] studies.”
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PremisecitationTMT-C Part A depends on processing speed, motor speed, visual scanning, and perceptual abilities; Part B also depends on working memory, inhibition, and executive functions.
“Part A relies on processing speed, motor speed, visual scanning, and perceptual abilities; Part B additionally relies on WM, inhibition, and other executive functions [32].”
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Study design and conductown dataSensitivity analyses were run separately for teacher and parent ratings and with anxiety and IQ covaried.
“Sensitivity analyses were also computed following this same approach (3 path analyses) separately for teacher and parent ratings and also covarying comorbid anxiety disorder and IQ (see Supplemental Tables S1, S2, S3, S4).”
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Study design and conductcitationTEA-Ch subtests reliably load on three factors: sustained, selective, and executive control.
“Consistent with the theoretical model informing test development, the TEA-Ch subtests reliably load onto three separate factors (sustained, selective, and executive control) [26].”
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PremisecitationThe review found no consistent impairments among CDS youth in planning, cognitive flexibility, naming speed, processing speed, interference control, or working memory.
“Youth with CDS did not demonstrate consistent deficits in processing speed, interference control, working memory (WM), planning, cognitive flexibility, or naming speed [3].”
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Study design and conductcitationD-KEFS Tower Test internal consistency is .56-.84 (average .67) in 8-12 year olds.
“Internal consistency coefficients for the Tower Test range from .56 to .84 (average of .67) in 8-12 year olds [33,35].”
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InterpretationcitationADHD-IN was uniquely linked to poorer sustained attention, greater distractibility, more cognitive interference errors, and worse Symbol Search.
“In contrast, and consistent with the ADHD literature, ADHD-IN was uniquely associated with poorer sustained attention, increased distractibility, and more errors related to cognitive interference [4,43], and worse Symbol Search performance [44], the latter likely related to poor focused attention and inhibition [45].”
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Premisenone givenExisting neurocognitive studies have mainly used school samples with low psychopathology or ADHD clinic samples.
“Notably, extant neurocognitive studies have primarily been conducted in school-based samples which generally have low levels of psychopathology (including CDS) or clinic samples of children diagnosed with ADHD.”
Quote in the paperSubstantial claimClassified as probably not a substantial claim. May combine two claims.
PremisecitationWISC-IV Coding and Symbol Search mainly assess processing speed, with working memory and motor skills also involved.
“The Coding and Symbol Search subtests [27] primarily measure children's processing speed, although WM and motor skills are also involved.”
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Study design and conductown dataIn this sample, internal consistency was good for parent CDS (.95), parent ADHD-IN (.96), teacher CDS (.94), and teacher ADHD-IN (.96).
“In the current sample reliability was good for parent-rated CDS (Cronbach's α = .95),parent-rated ADHD-IN (Cronbach's α = .96),teacher-rated CDS (Cronbach's α = .94),and teacher-rated ADHD-IN (Cronbach's α = .96).”
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Study design and conductcitationThe CADBI has strong psychometric properties, including reliability, structural validity, caregiver-teacher invariance, and concurrent and longitudinal external validity.
“The CADBI has been used in multiple studies in five countries with children spanning ages 4-16 years and has demonstrated strong psychometric properties, including reliability (internal consistency, test-retest, and interrater), structural validity (distinction from ADHD and other psychopathology dimensions), invariance across caregiver and teacher ratings, and concurrent and longitudinal external”
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Study design and conductcitationWISC-IV Coding and Symbol Search have strong psychometrics: internal consistency .85 and .79, and test-retest .84 and .80.
“The two subtests have strong psychometric properties [28] with internal consistency values of .85 for Coding and .79 for Symbol Search, and test-retest correlations of .84 for Coding and .80 for Symbol Search [29].”
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Study design and conductcitationD-KEFS CWI has high internal consistency (.62-.86) and high reliability.
“The CWI has high internal consistency (ranging from .62 to .86) and high reliability [34].”
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Study design and conductown dataResults were highly consistent across parent and teacher informants and when IQ and anxiety were included.
“Results were remarkably consistent when comparing parent (Table S1) and teacher (Table S2) informants as well as when including IQ (Table S3) and anxiety (Table S4) in the models.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationMost child and adolescent studies report slower processing speed with CDS after controlling ADHD, but some child and emerging adult studies do not.
“Most studies with children and adolescents report slower processing speed associated with CDS after covarying ADHD [4,5,[10][11][12][13] whereas associations have not been found in some studies of children or in studies of emerging adults) [14][15][16].”
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- cites [14][15][16]
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Study design and conductcitationTMT-C has good psychometrics, with excellent interrater reliability and alternate forms reliability .78-.92.
“Psychometric properties of the TMT-C are good with excellent interrater reliability and alternate forms of reliability ranging from .78 to .92 [31].”
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PremisecitationA substantial body of research supports CDS's external and internal validity.
“a large and growing body of research supports the external and internal validity of CDS [2].”
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Interpretationown dataCDS was uniquely linked to slower performance on tasks with graphomotor or visual-motor coordination demands (TMT-C Parts A and B, Sky Search time per target, DKEFS-Tower), poorer TEA-Ch DT, and slower mental processing on Color Naming and Word Reading, which together contributed to slower DKEFS-CWI Inhibition.
“As summarized in Table 5, CDS was uniquely associated with slower performance on tasks with a graphomotor or visual-motor coordination component (TMT-C Parts A and B, Sky Search time per target, DKEFS-Tower), poorer performance on TEA-Ch DT (greater decrement when having to perform two simultaneous tasks), and slower speed of mental processing on fundamental cognitive skills (Color Naming and Word”
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PremisecitationWu et al. found no clear CDS-neurocognition associations, while ADHD was linked to sustained attention, response inhibition, and working memory deficits.
“A more recent study by Wu et al. similarly reported no clear associations between CDS and neurocognitive deficits, whereas ADHD was associated with deficits in sustained attention, response inhibition, and WM [9].”
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Study design and conductcitationD-KEFS Tower Test test-retest reliability is moderate.
“Test-retest reliability is moderate for the Tower test [33,35,36].”
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PremisecitationWorking memory involves active top-down manipulation of short-term memory through updating, dual-processing, and temporal/serial reordering.
“WMinvolves the active, top-down manipulation of information held in short-term memory through updating, dual-processing, and temporal/ serial reordering [40].”
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Study design and conductown dataThe sample was mostly White, of higher socioeconomic status, had a narrow age range, and high ADHD rates, which may reduce generalizability.
“The sample was predominantly White, of higher socioeconomic status, included a limited age range, and high rates of ADHD which may limit generalizability.”
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InterpretationcitationThe study's findings may be stronger in more disadvantaged samples.
“making it possible that our findings may be stronger in more disadvantaged samples.”
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PremisecitationIt has been concluded that performance-based and rating measures assess different mental constructs, with performance-based measures reflecting processing efficiency and ratings reflecting success in rational goal pursuit.
“It has been concluded that performance-based measures and rating measures assess different underlying mental constructs with the former providing information regarding efficiency of processing, and the latter capturing success in rational goal pursuit [62].”
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Study design and conductreasoningChildren had a stimulant washout for the assessment, while parents and especially teachers likely rated them as usually observed, that is, while taking ADHD medication.
“Relatedly, children had a washout from stimulant medications for the assessment, whereas parents and particularly teachers likely completed ratings based on how they typically observed the child (i.e., while taking medications to manage their ADHD).”
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Study design and conductreasoningThe sample contained 13 children with parent-reported dyslexia/reading disorder, which may have affected Coding subtest performance because of its orthographic demands compared with Symbol Search.
“For example, the sample included 13 children whose parents reported a learning disability of Dyslexia/ Reading Disorder, which may have impacted performance on the Coding subtest due to orthographic demands relative to the Symbol Search task.”
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PremisecitationLow concordance is generally reported between executive functioning ratings and performance-based tasks that claim to measure the same neurocognitive domain.
“Generally low concordance between executive functioning ratings and performance-based tasks measuring the same purported neurocognitive domain is reported (e.g., performance on a working memory task is not necessarily associated with daily life ratings of working memory) [67].”
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Study design and conductreasoningThe study did not include academic achievement measures because it focused on neurocognitive functioning.
“We also did not include any academic achievement measures given our focus on neurocognitive functioning.”
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PremisecitationWåhlstedt and Bohlin used a composite of omissions, reaction times, and performance differences from a Go/NoGo task.
“Specifically, Wåhlstedt and Bohlin combined omissions, reaction times, and performance differences on a GNG task [61]”
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Study design and conductreasoningThe cross-sectional design rules out causal or temporal associations.
“Additionally, the study is cross-sectional precluding causal or temporal associations.”
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InterpretationcitationThese null results for CDS with planning, cognitive interference accuracy, and response inhibition match prior child studies that found no CDS link to planning tasks, Stroop accuracy, or response inhibition.
“These findings are consistent with previous work in children which reported no association of CDS and planning tasks (Tower of Hanoi [19] and CANTAB Stockings Task [9]), Stroop accuracy [19], or response inhibition [5,8,61].”
Quote in the paperNot a substantial claim0 of 5 sources checkedMay combine two claims.
PremisecitationOf the three remaining studies on CDS and Go/NoGo omissions in children and adolescents, results were mixed: two found CDS linked to more Gordan Diagnostic System Go/NoGo omission errors, and one found no link to Test of Variables of Attention omissions.
“The three remaining studies which reported on CDS and GNG omissions in children and teens reported mixed findings; two reported CDS was associated with more Gordan Diagnostic System GNG omission errors [4,5] and one reported no association between CDS and Test of Variables of Attention omissions [8].”
Quote in the paperNot a substantial claim0 of 3 sources checkedProbably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationCDS symptoms may be linked to lower family income and socioeconomic indicators.
“CDS symptoms may be associated with lower family income and socioeconomic indicators [63,64]”
Quote in the paperNot a substantial claim0 of 2 sources checkedMay combine two claims.
InterpretationcitationWith evidence that CDS is linked to poorer academic and social functioning and more internalizing symptoms, CDS appears to be an important clinical construct.
“Taken together with evidence that CDS is associated with poorer academic and social functioning as well as increased internalizing symptomatology [1,2], it appears CDS is an important clinical construct.”
Quote in the paperSubstantial claim0 of 2 sources checkedMay combine two claims.
InterpretationcitationWith other validity evidence, these findings further support CDS as an important clinical construct with significant negative sequelae.
“Taken together with other evidence of internal and external validity [2], these findings provide further support for CDS as an important clinical construct with significant negative sequelae.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [2] source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationMost studies find no significant race-CDS association, though one recent study found African American race linked to higher teacher-rated ADHD-IN and lower CDS symptoms.
“In addition, most studies have not found a significant association between race and CDS [2], though a recent study found African American race to be associated with higher teacher-rated ADHD-IN symptoms but lower CDS symptoms [64].”
Quote in the paperNot a substantial claim0 of 2 sources checkedClassified as probably not a substantial claim. May combine two claims.
PremisecitationEarlier research has linked CDS to poorer Go/NoGo accuracy and more omissions among children with ADHD and among typically developing children selected for high ADHD and CDS symptoms.
“This was somewhat surprising given work reporting an association of CDS with lower GNG accuracy [60] and more omissions in samples of children with ADHD [4,61] and typically developing children oversampled for ADHD and CDS symptoms [5].”
Quote in the paperSubstantial claim0 of 4 sources checkedProbably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationBaseline under-arousal may contribute to slower psychomotor speed and lower alertness, affecting neurocognitive task performance.
“which may contribute to slower psychomotor speed and lower levels of alertness impacting neurocognitive task performance [13,68].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [13]
Not checked in the free run.
- cites [68] source
Not checked in the free run.
Probably not a substantial claim: may not pass S2 (checkable).
InterpretationreasoningThe data suggest cognitive slowing as a possible intervention target for children with high CDS symptoms.
“These data also point to cognitive slowing as a possible intervention target for intervention in children with high CDS symptoms.”
Quote in the paperNot a substantial claimMay combine two claims.
Interpretationown dataThe findings strongly suggest that the CDS neurocognitive phenotype involves slowed cognitive processing, though replication is needed.
“Although replication is warranted, findings provide strong evidence that the neurocognitive phenotype of CDS is characterized by slowed cognitive processing.”
Quote in the paperSubstantial claim- Rests on an assumption: The neurocognitive tasks used in the study measure the intended neurocognitive constructs.
Classified as probably not a substantial claim.
PremisecitationPrior work suggests that youth self-report of CDS may add to a more comprehensive understanding of the ADHD neurocognitive phenotype.
“previous work has suggested that youth self-report of CDS may contribute to a more comprehensive understanding of the neurocognitive phenotype of ADHD [12].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [12] source
Not checked in the free run.
May combine two claims.
Study design and conductcitationThe Tower Test Achievement score has lower-than-desirable psychometric properties, with internal consistencies as low as .56 for ages 8-12, though one study reported that the Tower Test Time Per Move Ratio is sufficiently reliable for clinical and research use.
“Additionally, the psychometric properties of the Tower Test Achievement score (e.g., internal consistencies as low as .56 for the 8-12 year old age range) are lower than desirable, although one study reported that the Tower Test Time Per Move Ratio is sufficiently reliable for clinical and research use [36].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [36] source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing).
Study design and conductnone givenThe study could not examine baseline under-arousal.
“Finally, were not able to examine the role of baseline under-arousal”
Quote in the paperNot a substantial claim
The paper relies on this without support.
The neurocognitive tasks used in the study measure the intended neurocognitive constructs.
“Although we associated specific neurocognitive constructs with each task, cognitive factors other than those intended to be measured likely affect performance [62].”
The paper relies on this without support.
The parent and teacher ratings of CDS and ADHD-IN are valid measures of the respective symptom dimensions.
“There are also limitations related to using parent and teacher ratings to predict neurocognitive performance.”
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
There is some evidence that individuals with elevated CDS symptoms make more omission errors on sustained attention tasks, though not all studies support this association.
“There is some evidence that individuals exhibiting elevated CDS symptoms make more omission errors on sustained attention tasks [2, 10, 14, 39, 44], though again, not all studies have found support for this association [29].”
Studies in early childhood generally showed weak associations between CDS and slowed processing speed, while studies of older children and adults had mixed findings.
“Other evidence to support a link between CDS and a slowed processing speed comes from studies in early childhood [30, 31, 33] that generally showed weak associations, whereas studies of older children and adults have had mixed findings [10, 13, 14, 29, 32-40].”
Tamm et al. recently found consistent associations between CDS and slowed cognitive processing.
“though Tamm et al. [29] recently found consistent associations between CDS and slowed cognitive processing.”
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
Go/NoGo trial total does not match the block count
MinorSix blocks of 20 trials contain 120 trials, not the reported 360.
Reported 360 · recomputed 120
“Participants completed 360 trials in six continuously presented blocks of 20 trials with varying ISIs.”
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Executive function deficits in attention-deficit/hyperactivity disorder and autism spectrum disorder
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“Our current read of this literature is that children with elevated cognitive disengagement symptoms show accurate but moderately slowed performance across a wide range of neuropsychological tests 196 .”
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- Authors
- Tamm, L., Epstein, J. N., Orban, S. A., Kofler, M. J., Peugh, J. L., & Becker, S. P.
- Affiliations
- Cincinnati Children's Hospital Medical Center (US)
- University of Tampa (US)
- Florida State University (US)
- Corresponding author
- Tamm, Leanne
- ORCID
- Venue
- Child Neuropsychology
- Publisher
- Informa UK Limited
- Published
- 2023-03-02
- Volume
- 30
- Issue
- 2
- Pages
- 221-240
- ISSN
- 0929-7049 (ISSN-L)
- 1744-4136
- PMC
- PMC10474248
- OpenAlex
- W4323036290
- Semantic Scholar
- dcc8bcc99740df89bea4f96f60c0722217434766
- Cited by
- 25
- References
- 65
- Citations by year
- 2026: 7 · 2025: 6 · 2024: 6 · 2023: 6
- FWCI
- 5.07
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Child Neuropsychology (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institute of Mental Health (Trustee Award)
- Cincinnati Children’s Research Foundation
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
- Social Sciences › Psychology › Neuropsychology and Physiological Psychology › Developmental and Educational Neuropsychology
- Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
- Keywords
- cognitive disengagement syndrome, sluggish cognitive tempo, neurocognitive function, processing speed, children, verbal inhibition, rapid automatized naming, planning, divided attention, set-shifting, go/no-go task, visual exploration, interference control, parent and teacher ratings
- MeSH terms
- Attention, Attention Deficit Disorder with Hyperactivity, Child, Cognition, Cognition Disorders, Humans, Schools
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