Cited by 85Autism Spectrum Disorder ResearchAttention Deficit Hyperactivity DisorderDevelopmental and Educational Neuropsychology

Children with autism and attention deficit hyperactivity disorder. Relationships between symptoms and executive function, theory of mind, and behavioral problems

Open access
Berenguer, Carmen, Roselló, Belén, Colomer, Carla, Baixauli, Inmaculada, Miranda, Ana·2018·Research in Developmental Disabilities

Abstract

BACKGROUND The underlying mechanisms of comorbidity between autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD) are still unknown. Executive function (EF) deficits and theory of mind (ToM) have been the most investigated cognitive processes. AIMS This study proposed to analyze EF, ToM and behavioral problems in children with ASD + ADHD, ADHD, ASD and typical development (TD). The relationship between ADHD and ASD symptoms with EF, ToM and behavioral problems in children with ASD + ADHD was also explored. METHODS AND PROCEDURES Participants were 124 children between 7 and 11 years old (22 ASD + ADHD, 35 ADHD, 30 ASD, and 37 TD), matched on age and IQ. Teachers evaluated EF, and parents assessed ToM skills and behavioral problems through Strengths and Difficulties Questionnaire (SDQ). OUTCOMES AND RESULTS Children with ASD + ADHD and ADHD showed impairments in EF whereas the difficulties in ToM skills of ASD + ADHD group were similar to ASD group. Inattention symptoms were significantly associated with EF metacognitive deficits and ToM difficulties in ASD + ADHD, while ASD symptoms were associated with total score in behavioral problems. CONCLUSIONS AND IMPLICATIONS These findings show the complex difficulties of children with both ASD and ADHD and support the need to take these difficulties into account when designing the treatments.

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Crossref · 10.1016/j.ridd.2018.10.001

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  • Findingown data
    § Comparison of children with ASD, ASD+ADHD, ADHD, and TD on emotional and behavioral problems

    The MANCOVA main effect of group on SDQ indicators was statistically significant.

    “The MANCOVA performed to evaluate the main effect of group on the SDQ indicators was statistically significant [Wilk's Lambda (Λ) = .22,F (12,301) = 18.99, p < .001,η 2 p = .39].”
    Quote in the paperSubstantial claim
  • Findingown data
    § Comparison of children with ASD, ASD+ADHD, ADHD, and TD on executive functioning measures

    In emotional control and initiative, significant differences were found only between the clinical ASD and ADHD groups.

    “Finally, in the domains of emotional control and initiative, significant differences were only found between the clinical ASD and ADHD groups.”
    Quote in the paperNot a substantial claim
  • Findingown data
    § Comparison of children with ASD, ASD+ADHD, ADHD, and TD on emotional and behavioral problems

    On hyperactivity, the two ADHD groups were more affected than the ASD group.

    “Specifically, on hyperactivity the two groups with ADHD were more affected than the ASD group.”
    Quote in the paperNot a substantial claim
  • Findingown data
    § Multiple regression analyses measuring the contribution of inattention, H/I, and ASD symptoms to EF, ToM, and total SDQ in the comorbid ASD+ADHD group

    None of inattention, hyperactivity/impulsivity, or ASD symptoms were significant predictors of the behavioral regulation index.

    “None of the inattention, H/I, or ASD symptoms were significant predictors of the behavioral regulation index (BRI).”
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  • Findingown data
    § Comparison of children with ASD, ASD+ADHD, ADHD, and TD on emotional and behavioral problems

    Total SDQ scores revealed significant differences between the ASD-alone group and the ASD+ADHD group.

    “The results for the total score on the SDQ revealed significant differences between the group with ASD alone and the ASD+ADHD group (table 4).”
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    Findingown data
    § Comparison of children with ASD, ASD+ADHD, ADHD, and TD on executive functioning measures

    ANCOVAs showed significant group differences on inhibition, shift, emotional control, BRI, initiative, working memory, planning, organization of material, monitoring, and MI.

    “The confirmation ANCOVAs showed significant differences on Inhibition, F1,117 = 20.13,p < .001,η 2 p = .34;shift, F1,117 = 22.18, p < .001,η 2 p = .36;Emotional control, F1,117 = 11.81,p < .001,η 2 p = .23,and the BRI, F1,117 = 19.84,p < .001,η 2 p = .33.The confirmation ANCOVAs also yielded statistically significant differences between the groups on the metacognitive processes: initiative, F1,117”
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    Findingown data
    § Comparison of children with ASD, ASD+ADHD, ADHD, and TD on executive functioning measures

    Post hoc analyses revealed significant differences between the TD group and clinical groups on all BRIEF variables except inhibition and organization of materials, where TD and ASD had lower scores than the two groups with ADHD symptoms.

    “The post hoc analyses revealed significant differences between the TD group and the clinical groups on all the BRIEF variables analyzed in this study, except inhibition and organization of materials, where the TD group and the ASD group showed a significantly lower score than the two groups with ADHD symptoms.”
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    Findingown data
    § Comparison of children with ASD, ASD+ADHD, ADHD, and TD on emotional and behavioral problems

    Post hoc analyses revealed significant differences between the TD group and clinical groups on all SDQ scales except behavioral problems, where ASD and TD did not differ.

    “Post hoc analyses revealed significant differences between the TD group and the clinical groups on all the SDQ scales, except the behavioral problems subscale, where the ASD group and the TD group did not present significant differences.”
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    Findingown data
    § Comparison of children with ASD, ASD+ADHD, ADHD, and TD on executive functioning measures

    The ASD group had significantly lower scores than the ADHD and ASD+ADHD groups on working memory, planning, monitoring, and the two general indexes BRI and MI.

    “Likewise, the ASD group showed a significantly lower score than the two groups with ADHD symptoms (ADHD and ASD+ADHD) on the executive domains of working memory, planning, monitoring, and the two general indexes from the BRI and MI (table 2).”
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    Findingown data
    § Comparison of children with ASD, ASD+ADHD, ADHD, and TD on social cognition measures (emotion recognition and ToMI Inventory)

    ANCOVAs showed significant group differences on emotion recognition, ToMI Early, ToMI Basic, ToMI Advanced, and total ToMI.

    “The confirmation ANCOVAs showed significant differences on emotion recognition, F1,117 = 8.21, p < .001,η 2 p = .17;ToMI Early, F1,117= 22.82, p < .001,η 2 p = .37;ToMI Basic, F1,117= 37.46, p < .001,η 2 p = .49;ToMI Advanced, F1,117= 83.94, p < .001,η 2 p = .68,and the total score on the ToMI, F1,117 = 62.20, p < .001,η 2 p = .61.”
    Quote in the paperSubstantial claim
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    Findingown data
    § Multiple regression analyses measuring the contribution of inattention, H/I, and ASD symptoms to EF, ToM, and total SDQ in the comorbid ASD+ADHD group

    In the ASD+ADHD group, inattention symptoms were a significant individual predictor of theory of mind (β = -.52, t = -2.7, p = .013), with all indicators explaining 38% of the variance.

    “The regressions carried out indicated that the inattention symptoms were a significant individual predictor of both the metacognitive index (β = .40,t = 2.3, p = .05)and theory of mind (β = -.52,t = -2.7,p = .013).All of the indicators together explain 33 and 38% of the variance, respectively.”
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    Findingown data
    § Multiple regression analyses measuring the contribution of inattention, H/I, and ASD symptoms to EF, ToM, and total SDQ in the comorbid ASD+ADHD group

    In the ASD+ADHD group, inattention symptoms were a significant individual predictor of the metacognitive index (β = .40, t = 2.3, p = .05), with all indicators explaining 33% of the variance.

    “The regressions carried out indicated that the inattention symptoms were a significant individual predictor of both the metacognitive index (β = .40,t = 2.3, p = .05)and theory of mind (β = -.52,t = -2.7,p = .013).All of the indicators together explain 33 and 38% of the variance, respectively.”
    Quote in the paperSubstantial claim
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    Findingown data
    § Comparison of children with ASD, ASD+ADHD, ADHD, and TD on emotional and behavioral problems

    ANCOVAs showed significant group differences on emotional symptoms, behavioral problems, hyperactivity, peer problems, and total SDQ.

    “The confirmation ANCOVAs showed significant differences on the scales of emotional symptoms, F1,117 = 12.33, p < .001,η 2 p = .24;behavioral problems, F1,117= 6.61, p < .001,η 2 p = .14;hyperactivity, F1,117 = 37.92, p < .001,η 2 p = .49;peer problems, F1,117 = 59.96, p < .001,η 2 p = .60,and the total score on the SDQ, F1,117 = 42.14, p < .001,η 2 p = .52.”
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    Findingown data
    § DISCUSSION

    The emotion recognition findings align with Bühler et al. (2011) but conflict with studies reporting greater impairment in the comorbid ASD+ADHD group.

    “These results, similar to those found by Bühler et al. (2011), diverge from other studies that observed greater impairments in facial recognition of emotions in the comorbid group (ASD+ADHD)”
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    • Rests on an assumption: The four groups are comparable on relevant confounders despite observed differences in parental education, sex, and medication.
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    Premisecitation
    § INTRODUCTION

    Executive functioning and theory of mind impairments have important effects on social adaptation.

    “Specifically, the research on psychological processes underlying the ASD+ADHD association has mainly revolved around impairments in executive functioning (EF) and theory of mind (TOM) (Antshell et al., 2016;Doyle et al., 2017), which have been shown to have important effects on social adaptation (Ashwood et al., 2015;Lyall et al., 2017).”
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    Premisecitation
    § INTRODUCTION

    The DSM-5 permits a joint diagnosis of ASD and ADHD, justified by the high comorbidity and overlapping symptoms, especially inattention.

    “Recently, for the first time, the DSM-5 (American Psychiatric Association (APA), 2013) allowed the joint diagnosis of ASD and ADHD (ASD+ADHD), based on the high comorbidity presented by the two disorders and the co-occurrence of symptoms, especially inattention (Visser et al., 2016).”
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    Premisecitation
    § INTRODUCTION

    Studies highlight relationships between inattention and inhibitory control and verbal working memory problems, as well as between stereotyped behavior and flexibility problems.

    “Studies on this topic highlight the relationship between inattention and inhibitory control and verbal working memory problems (Neely et al., 2016;Sinzig et al., 2008b;Takeuchi et al., 2013), as well as stereotyped behavior and flexibility problems (Sinzig et al., 2008b).”
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    • cites Sinzig et al., 2008b

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    Premisecitation
    § INTRODUCTION

    The ASD+ADHD group shares emotional and behavioral problems with the ADHD group, but impairment in adaptive functioning of the ASD group also contributes.

    “More specifically, the ASD+ADHD group shares emotional and behavioral problems with the ADHD group, but the impairment in adaptive functioning of the ASD group also participates (Craig et al., 2015).”
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    § INTRODUCTION

    The literature suggests that ADHD symptoms contribute to increasing theory of mind difficulties in children with ASD, leading to less empathy development.

    “The literature on cognition processes, ToM, and emotion recognition (ER) in children with ASD+ADHD, although scarce, suggests that the ADHD symptoms contribute to increasing ToM difficulties in children with ASD, leading to less development of empathy, measured by “Reading the Mind in the Eyes” (Columbi and Ghaziddin, 2017).”
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    § INTRODUCTION

    Difficulties in shifting are not usually found in the ASD+ADHD group compared with the pure ASD group on laboratory tasks, but they have been identified using parent reports.

    “For example, difficulties in shifting are not usually found in the ASD+ADHD group, compared to the pure ASD group, on laboratory tasks, but they have been identified using parent reports (Yerys et al., 2009).”
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    § INTRODUCTION

    Children with ASD without ADHD show a reduction in behavior problems over time, whereas the ASD+ADHD group's behavioral difficulties remain and even increase.

    “Children with ASD without associated manifestations of ADHD experience a reduction in behavior problems over time, whereas in the ASD+ADHD group, the behavioral difficulties remain and even present an incremental trajectory (Flouri et al., 2015).”
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    § INTRODUCTION

    In some cases, planning differences in the ASD+ADHD group were only marginally significant.

    “The few studies that have examined the domains of planning and cognitive flexibility indicate a greater planning deficit in the ASD+ADHD group (Pitzianti et al., 2016;Unterrainer et al., 2016), although in some cases the differences were only marginally significant (Colombi et al., 2017).”
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    § INTRODUCTION

    On sustained attention tasks, children with ASD+ADHD perform worse and resemble the ADHD group in response time variability and attentional orientation impairments.

    “Specifically, on sustained attention tasks, various studies show worse performance in children with ASD+ADHD, who were similar to the ADHD group in response time variability (Adamo et al., 2014;Lundervold et al., 2016) and attentional orientation impairments (Tye et al., 2014).”
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    Premisecitation
    § INTRODUCTION

    After controlling for reaction time speed, inattention, and inhibition, a greater impairment in affective prosody persists in the ASD+ADHD group.

    “Moreover, after controlling reaction time speed, inattention, and inhibition, a greater impairment in affective prosody persists in the ASD+ADHD group (Oerlemans et al., 2014).”
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    Study design and conductown data
    § Procedure

    The study had ethics committee approval and obtained authorization and parental consent.

    “This study had the approval of the Ethics Committee of the University of Valencia (Helsinki Declaration in the Convention of the European Council, 1964).It also obtained the authorization of the Board of Education of the Valencian Government to approach the schools and the oral and written consent of all the parents of the children included in the study, after informing them about the study ob”
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    Study design and conductcitation
    § Social Cognition

    The NEPSY-II has high internal reliability coefficients (r ≥ .80).

    “The internal reliability coefficients are high (r ≥ .80)(Brooks et al., 2010).”
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    Study design and conductcitation
    § Measures Executive functioning

    The Spanish adaptation of the teacher BRIEF has test-retest reliability between .86 and .92, similar to the original version.

    “The test-retest reliability of the Spanish adaptation of the teacher version of the BRIEF ranges between .86 and .92(Maldonado, 2016).These values are similar to those obtained for the original version of the questionnaire (Gioia et al., 2000).”
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    § INTRODUCTION

    Sometimes no inhibitory deficits have been found in the comorbid ASD+ADHD group.

    “Inhibitory problems seem to be shared by the group with ASD+ADHD and the group with ADHD (Bühler et al., 2011;Chantiluke et al., 2014;Sinzig et al., 2008b;Tye et al., 2014), although sometimes no inhibitory deficits have been found in the comorbid group (Sinzig et al., 2008a;Van der Meer et al., 2012;Yerys et al., 2009).”
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    • cites Sinzig et al., 2008a

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    § INTRODUCTION

    Electrophysiological studies show atypical processing of face and gaze in children with ASD and ADHD+ASD compared with children with ADHD and typical development.

    “Likewise, electrophysiological studies have shown atypical processing of the face and gaze in children with ASD and ADHD+ASD, compared to children with ADHD and TD (Groom et al., 2017;Tye et al., 2014;Tye et al., 2014).”
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    Premisecitation
    § INTRODUCTION

    These results suggest that children with ASD lack theory of mind prerequisites, whereas deficits in mentalist skills in ADHD could develop later due to difficulties in social relationships.

    “These results suggest that children with ASD lack ToM prerequisites, whereas deficits in mentalist skills in ADHD could develop later, due to their difficulties in social relationships (Bühler et al., 2011).”
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    Study design and conductcitation
    § Emotional and behavioral functioning

    The SDQ has good statistical and psychometric properties (.73) and good reliability in the Spanish population (.76).

    “The SDQ has good statistical and psychometric properties (.73) measured with Cronbach's alpha (Goodman, 2001), and it has shown good reliability in the Spanish population (.76) (Rodríguez et al., 2012).”
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    Study design and conductcitation
    § METHOD Participants

    ASD diagnosis was confirmed using recommended cut-off points for the SCQ and ADI-R, administered by an accredited psychologist.

    “To confirm the ASD diagnosis, recommended cut-off points for the Social Communication Questionnaire (SCQ; Rutter et al., 2003a) and the revised autism diagnostic interview (ADI-R; Rutter et al., 2003b) were used, and these instruments were administered by a psychologist from the research team who was accredited in their application.”
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    Study design and conductown data
    § Data analysis

    Group differences were analyzed with MANCOVAs and ANCOVAs controlling for sex, vocabulary, and parental education, with Bonferroni correction.

    “To do so, three multivariate analyses of covariance (MANCOVAs) were conducted, using sex, vocabulary, and the educational level of the parents as covariates.The differences on the tests were verified through covariate analyses of variance (ANCOVAs).For the additional ANCOVAs, the level of significance was established at p <.005 in the comparisons of the different executive functioning domains, af”
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    Study design and conductcitation
    § METHOD Participants

    Participants had IQ within normal limits (>80) measured with the K-BIT and were matched on age and IQ.

    “The participants had an intellectual capacity (IQ) within the limits of normality (>80), measured with the K-BIT (Kaufman and Kaufman, 2000), and they were matched on age and IQ.”
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    § DISCUSSION

    Current research concentrates on childhood, even though cognitive and social processes are known to change across development.

    “The research is currently focused on childhood, in spite of evidence that changes occur in the cognitive and social processes throughout development (Hartman et al., 2017).”
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    Interpretationreasoning
    § DISCUSSION

    The defining features of comorbid ASD+ADHD substantially influence how treatments are evaluated and designed.

    “The characteristics that define comorbid ASD+ADHD have important effects on the evaluation and design of treatments.”
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    Premisecitation
    § DISCUSSION

    Changes over time in the adaptive and social functioning of children with ASD seem partly driven by comorbid ADHD symptoms, which may worsen behavior problems.

    “The evolution of the adaptive and social functioning of children with ASD seems to be determined, in part, by the influence of the comorbid ADHD symptoms, which could worsen the behavior problems (Flouri et al., 2015)”
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    Premisecitation
    § DISCUSSION

    Comorbid symptoms in ASD have received insufficient attention.

    “Until now, the topic of comorbid symptoms in ASD has not received enough attention”
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    Interpretationreasoning
    § DISCUSSION

    The findings point to an additive deficit in the comorbid ASD+ADHD group, which shares difficulties with both conditions across executive, cognitive, and everyday social functioning.

    “the findings suggest the existence of an additive deficit in the comorbid ASD+ADHD group, which shared difficulties with both disorders in executive, cognitive, and social functioning in everyday life.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The four groups are comparable on relevant confounders despite observed differences in parental education, sex, and medication.
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    Interpretationreasoning
    § DISCUSSION

    This study adds to prior work by assessing a broad set of executive, social-cognitive, and behavioral problems in children with ASD+ADHD.

    “The present study extends the previous literature by studying a wide range of executive processes, social cognition processes, and behavioral problems in children with ASD+ADHD.”
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    Premisecitation
    § DISCUSSION

    Prior work has reported significant links between inhibitory control and inattention symptoms in children with ASD.

    “although significant associations have also been found between inhibitory control and inattention symptoms in children with ASD (Neely et al., 2016)”
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  • The paper relies on this without support.

    The associations between symptoms and outcomes are causal in the direction stated (e.g., inattention symptoms cause or worsen metacognitive and theory-of-mind difficulties; ADHD symptoms worsen functioning).

    “which means that the presence of ADHD symptoms worsens the social, adaptive, and behavioral functioning of children with ASD.”
  • The paper relies on this without support.

    The four groups are comparable on relevant confounders despite observed differences in parental education, sex, and medication.

    “Parental education 3.5 (.96) 3.4 (1.0) 1.8 (1.4) 3.1 (1.2) 14.65 -.000*”
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Statistics recomputed

Every reported test result, recomputed from its test statistic and degrees of freedom. A result shows as not adding up only once an independent check has confirmed it.

  • ConsistentF(30, 317) = 6.2reported p < .001 · recomputed p < .001

    “F(30,317) = 6.20, p < .001”

  • ConsistentF(15, 312) = 12.65reported p < .001 · recomputed p < .001

    “F(15,312) = 12.65, p < .001”

  • ConsistentF(12, 301) = 18.99reported p < .001 · recomputed p < .001

    “F (12,301) = 18.99, p < .001”

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Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Claim of greater difficulties than both pure groups exceeds the reported comparisons

    Major

    The discussion says the comorbid group had more emotional and behavioral difficulties than both pure clinical groups. For total SDQ difficulties, the table reports a significant difference from ASD alone but not from ADHD alone; several individual scales likewise show no significant difference from ADHD.

  • Metacognitive regression coefficient does not match its t statistic

    Major

    The reported coefficient divided by its standard error is about 2.04, not 2.33. With 18 residual degrees of freedom, that difference could change whether the inattention predictor meets the conventional 0.05 significance threshold.

    Reported 2.33 · recomputed 2.038462

  • Group-test numerator degrees of freedom are mislabeled

    Minor

    An omnibus comparison of four groups has three numerator degrees of freedom, not one. The reported residual degrees of freedom of 117 also fit four groups and three covariates, making the displayed F1,117 label inconsistent with the analysis described.

  • SDQ regression coefficient does not match its t statistic

    Minor

    The ASD-symptom coefficient divided by its standard error is about 2.95, rather than the reported 2.73. The gap is too large to result from rounding the displayed coefficient and standard error.

    Reported 2.73 · recomputed 2.945946

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Authors
Berenguer, C., Roselló, B., Colomer, C., Baixauli, I., & Miranda, A.
Affiliations
  • Universitat de València (ES)
  • Valencia Catholic University Saint Vincent Martyr (ES)
Corresponding author
Berenguer, Carmen
Venue
Research in Developmental Disabilities
Publisher
Elsevier BV
Published
2018-12
Volume
83
Pages
260-269
ISSN
0891-4222 (ISSN-L)
OpenAlex
W2898260092
Cited by
85
References
55
Citations by year
2026: 8 · 2025: 13 · 2024: 7 · 2023: 18 · 2022: 15 · 2021: 12 · 2020: 8 · 2019: 4
FWCI
3.58
Type
journal article
Language
en
Open access
Locations
  • Research in Developmental Disabilities (publishedVersion)
  • PubMed (publishedVersion)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion, other-oa)
  • Repositori UJI (Universitat Jaume I) (submittedVersion, public-domain)
  • Repository of Digital Objects for Teaching Research and Culture (University of Valencia) (submittedVersion, other-oa)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Social Sciences › Psychology › Neuropsychology and Physiological Psychology › Developmental and Educational Neuropsychology
Keywords
autism spectrum disorder, attention deficit hyperactivity disorder, comorbidities, executive function, theory of mind, behavioral problems, inattention, metacognitive deficits, children, Strengths and Difficulties Questionnaire
MeSH terms
Problem Behavior, Behavior Observation Techniques, Metacognition, Attention, Attention Deficit Disorder with Hyperactivity, Autistic Disorder, Child, Female, Humans, Male, Spain, Executive Function, Theory of Mind

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 2026-10-06.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-06.

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.

What counts as a claim ›How we measure confidence ›How we check this ›

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