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Auteur Marley W. WATKINS |
Documents disponibles écrits par cet auteur (2)
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Does the Factor Structure of IQ Differ Between the Differential Ability Scales (DAS-II) Normative Sample and Autistic Children? / Caitlin C. CLEMENTS in Autism Research, 13-7 (July 2020)
[article]
Titre : Does the Factor Structure of IQ Differ Between the Differential Ability Scales (DAS-II) Normative Sample and Autistic Children? Type de document : Texte imprimé et/ou numérique Auteurs : Caitlin C. CLEMENTS, Auteur ; Marley W. WATKINS, Auteur ; Robert T. SCHULTZ, Auteur ; Benjamin E YERYS, Auteur Article en page(s) : p.1184-1194 Langues : Anglais (eng) Mots-clés : autism spectrum disorders autistic disorder educational psychology factor analysis intelligence psychometrics Index. décimale : PER Périodiques Résumé : The Differential Abilities Scales, 2nd edition (DAS-II) is frequently used to assess intelligence in autism spectrum disorder (ASD). However, it remains unknown whether the DAS-II measurement model (e.g., factor structure, loadings), which was developed on a normative sample, holds for the autistic population or requires alternative score interpretations. We obtained DAS-II data from 1,316 autistic individuals in the Simons Simplex Consortium and 2,400 individuals in the normative data set. We combined ASD and normative data sets for multigroup confirmatory factor analyses to assess different levels of measurement invariance, or how well the same measurement model fit both data sets: "weak" or metric, "strong" or scalar, and partial scalar if full scalar was not achieved. A weak invariance model showed excellent fit (Confirmatory Fit Index [CFI]?>?0.995, Tucker Lewis Index [TLI]?>?0.995, root mean square error of approximation [RMSEA]?0.025), but a strong invariance model demonstrated a significant deterioration in fit during permutation testing (all p's<0.001), suggesting measurement bias, meaning systematic error when assessing autistic children. Fit improved significantly, and partial scalar invariance was achieved when either of the two spatial subtest (Recall of Designs or Pattern Construction) intercepts was permitted to vary between the ASD and normative groups, pinpointing these subtests as the source of bias. The DAS-II appears to measure verbal and nonverbal-but not spatial-intelligence in autistic children similarly as in normative sample children. These results may be driven by Pattern Construction, which shows higher scores than other subtests in the ASD sample. Clinicians assessing autistic children with the DAS-II should interpret verbal and nonverbal reasoning composite scores over the spatial score or General Composite Ability. Autism Res 2020, 13: 1184-1194. © 2020 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: The Differential Abilities Scales, 2nd edition (DAS-II) is a popular intelligence quotient (IQ) test for assessing children with autism. This article shows that the DAS-II spatial standardized scores should be interpreted with caution because they hold a different meaning for autistic children. Verbal and nonverbal reasoning scores appear valid and to hold the same meaning for those with and without autism spectrum disorder. En ligne : http://dx.doi.org/10.1002/aur.2285 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=429
in Autism Research > 13-7 (July 2020) . - p.1184-1194[article] Does the Factor Structure of IQ Differ Between the Differential Ability Scales (DAS-II) Normative Sample and Autistic Children? [Texte imprimé et/ou numérique] / Caitlin C. CLEMENTS, Auteur ; Marley W. WATKINS, Auteur ; Robert T. SCHULTZ, Auteur ; Benjamin E YERYS, Auteur . - p.1184-1194.
Langues : Anglais (eng)
in Autism Research > 13-7 (July 2020) . - p.1184-1194
Mots-clés : autism spectrum disorders autistic disorder educational psychology factor analysis intelligence psychometrics Index. décimale : PER Périodiques Résumé : The Differential Abilities Scales, 2nd edition (DAS-II) is frequently used to assess intelligence in autism spectrum disorder (ASD). However, it remains unknown whether the DAS-II measurement model (e.g., factor structure, loadings), which was developed on a normative sample, holds for the autistic population or requires alternative score interpretations. We obtained DAS-II data from 1,316 autistic individuals in the Simons Simplex Consortium and 2,400 individuals in the normative data set. We combined ASD and normative data sets for multigroup confirmatory factor analyses to assess different levels of measurement invariance, or how well the same measurement model fit both data sets: "weak" or metric, "strong" or scalar, and partial scalar if full scalar was not achieved. A weak invariance model showed excellent fit (Confirmatory Fit Index [CFI]?>?0.995, Tucker Lewis Index [TLI]?>?0.995, root mean square error of approximation [RMSEA]?0.025), but a strong invariance model demonstrated a significant deterioration in fit during permutation testing (all p's<0.001), suggesting measurement bias, meaning systematic error when assessing autistic children. Fit improved significantly, and partial scalar invariance was achieved when either of the two spatial subtest (Recall of Designs or Pattern Construction) intercepts was permitted to vary between the ASD and normative groups, pinpointing these subtests as the source of bias. The DAS-II appears to measure verbal and nonverbal-but not spatial-intelligence in autistic children similarly as in normative sample children. These results may be driven by Pattern Construction, which shows higher scores than other subtests in the ASD sample. Clinicians assessing autistic children with the DAS-II should interpret verbal and nonverbal reasoning composite scores over the spatial score or General Composite Ability. Autism Res 2020, 13: 1184-1194. © 2020 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: The Differential Abilities Scales, 2nd edition (DAS-II) is a popular intelligence quotient (IQ) test for assessing children with autism. This article shows that the DAS-II spatial standardized scores should be interpreted with caution because they hold a different meaning for autistic children. Verbal and nonverbal reasoning scores appear valid and to hold the same meaning for those with and without autism spectrum disorder. En ligne : http://dx.doi.org/10.1002/aur.2285 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=429 Evaluation of the ADHD Rating Scale in Youth with Autism / Benjamin E. YERYS in Journal of Autism and Developmental Disorders, 47-1 (January 2017)
[article]
Titre : Evaluation of the ADHD Rating Scale in Youth with Autism Type de document : Texte imprimé et/ou numérique Auteurs : Benjamin E. YERYS, Auteur ; Jenelle NISSLEY-TSIOPINIS, Auteur ; Ashley DE MARCHENA, Auteur ; Marley W. WATKINS, Auteur ; Ligia ANTEZANA, Auteur ; Thomas J. POWER, Auteur ; Robert T. SCHULTZ, Auteur Article en page(s) : p.90-100 Langues : Anglais (eng) Mots-clés : Autism Attention deficit/hyperactivity disorder Comorbidity Screening Factor analysis Index. décimale : PER Périodiques Résumé : Scientists and clinicians regularly use clinical screening tools for attention deficit/hyperactivity disorder (ADHD) to assess comorbidity without empirical evidence that these measures are valid in youth with autism spectrum disorder (ASD). We examined the prevalence of youth meeting ADHD criteria on the ADHD rating scale fourth edition (ADHD-RS-IV), the relationship of ADHD-RS-IV ratings with participant characteristics and behaviors, and its underlying factor structure in 386, 7–17 year olds with ASD without intellectual disability. Expected parent prevalence rates, relationships with age and externalizing behaviors were observed, but confirmatory factor analyses revealed unsatisfactory fits for one-, two-, three-factor models. Exploratory analyses revealed several items cross-loading on multiple factors. Implications of screening ADHD in youth with ASD using current diagnostic criteria are discussed. En ligne : http://dx.doi.org/10.1007/s10803-016-2933-z Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=298
in Journal of Autism and Developmental Disorders > 47-1 (January 2017) . - p.90-100[article] Evaluation of the ADHD Rating Scale in Youth with Autism [Texte imprimé et/ou numérique] / Benjamin E. YERYS, Auteur ; Jenelle NISSLEY-TSIOPINIS, Auteur ; Ashley DE MARCHENA, Auteur ; Marley W. WATKINS, Auteur ; Ligia ANTEZANA, Auteur ; Thomas J. POWER, Auteur ; Robert T. SCHULTZ, Auteur . - p.90-100.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 47-1 (January 2017) . - p.90-100
Mots-clés : Autism Attention deficit/hyperactivity disorder Comorbidity Screening Factor analysis Index. décimale : PER Périodiques Résumé : Scientists and clinicians regularly use clinical screening tools for attention deficit/hyperactivity disorder (ADHD) to assess comorbidity without empirical evidence that these measures are valid in youth with autism spectrum disorder (ASD). We examined the prevalence of youth meeting ADHD criteria on the ADHD rating scale fourth edition (ADHD-RS-IV), the relationship of ADHD-RS-IV ratings with participant characteristics and behaviors, and its underlying factor structure in 386, 7–17 year olds with ASD without intellectual disability. Expected parent prevalence rates, relationships with age and externalizing behaviors were observed, but confirmatory factor analyses revealed unsatisfactory fits for one-, two-, three-factor models. Exploratory analyses revealed several items cross-loading on multiple factors. Implications of screening ADHD in youth with ASD using current diagnostic criteria are discussed. En ligne : http://dx.doi.org/10.1007/s10803-016-2933-z Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=298