Comparing Autism, PDD-NOS, and Other Developmental Disabilities on Parent-Reported Behavior Problems: Little Evidence for ASD Subtype Validity / Anne V. SNOW in Journal of Autism and Developmental Disorders, 41-3 (March 2011)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 41-3 (March 2011) . - p.302-310 Titre : Comparing Autism, PDD-NOS, and Other Developmental Disabilities on Parent-Reported Behavior Problems: Little Evidence for ASD Subtype Validity Type de document : Texte imprimé et/ou numérique Auteurs : Anne V. SNOW, Auteur ; Luc LECAVALIER, Auteur Année de publication : 2011 Article en page(s) : p.302-310 Langues : Anglais (eng) Mots-clés : Autism  PDD-NOS  Subtypes  Classification  Validity  Behavior problems Index. décimale : PER Périodiques Résumé : Studies on the distinction between Autistic Disorder (AD) and Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS) have been inconclusive. This study examined the validity of PDD-NOS by comparing it to AD and other developmental disorders (DD) on parent-reported behavior problems. Fifty-four children with PDD-NOS were individually matched on age and non-verbal IQ to 54 children with AD and 54 children with DD. Groups were compared on select subscales of the Child Behavior Checklist. High rates of psychopathology were observed in both ASD groups. The only difference between PDD-NOS and AD groups was higher scores in the PDD-NOS group on two items measuring Anxiety/Depression. Cognitive functioning may be a more salient variable than subtype when studying psychopathology in individuals with ASDs. En ligne : http://dx.doi.org/10.1007/s10803-010-1054-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=118 [article] Comparing Autism, PDD-NOS, and Other Developmental Disabilities on Parent-Reported Behavior Problems: Little Evidence for ASD Subtype Validity [Texte imprimé et/ou numérique] / Anne V. SNOW, Auteur ; Luc LECAVALIER, Auteur . - 2011 . - p.302-310. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 41-3 (March 2011) . - p.302-310 Mots-clés : Autism  PDD-NOS  Subtypes  Classification  Validity  Behavior problems Index. décimale : PER Périodiques Résumé : Studies on the distinction between Autistic Disorder (AD) and Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS) have been inconclusive. This study examined the validity of PDD-NOS by comparing it to AD and other developmental disorders (DD) on parent-reported behavior problems. Fifty-four children with PDD-NOS were individually matched on age and non-verbal IQ to 54 children with AD and 54 children with DD. Groups were compared on select subscales of the Child Behavior Checklist. High rates of psychopathology were observed in both ASD groups. The only difference between PDD-NOS and AD groups was higher scores in the PDD-NOS group on two items measuring Anxiety/Depression. Cognitive functioning may be a more salient variable than subtype when studying psychopathology in individuals with ASDs. En ligne : http://dx.doi.org/10.1007/s10803-010-1054-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=118

Practitioner’s Guide to Assessment of Autism Spectrum Disorders in Infants and Toddlers / Amanda MOSSMAN STEINER in Journal of Autism and Developmental Disorders, 42-6 (June 2012)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 42-6 (June 2012) . - p.1183-1196 Titre : Practitioner’s Guide to Assessment of Autism Spectrum Disorders in Infants and Toddlers Type de document : Texte imprimé et/ou numérique Auteurs : Amanda MOSSMAN STEINER, Auteur ; Tina R. GOLDSMITH, Auteur ; Anne V. SNOW, Auteur ; Katarzyna CHAWARSKA, Auteur Année de publication : 2012 Article en page(s) : p.1183-1196 Langues : Anglais (eng) Mots-clés : Early diagnosis  Clinical evaluation  Infants and toddlers Index. décimale : PER Périodiques Résumé : Recent advances in clinical research have made it possible to diagnosis autism spectrum disorders (ASD) as early as the second year of life. The diagnostic process early in development is often complex, and thus, familiarity with the most recent findings in clinical assessment instruments, early symptoms, and developmental trajectories of young children with autism is essential. This paper provides an empirically based practitioner’s guide to issues and concerns related to early diagnosis of ASD in very young children, documentation of the course and patterns of ASD symptomatology in infants and toddlers, and current understanding in the field of diagnostic outcomes of children identified in the first and second year of life. En ligne : http://dx.doi.org/10.1007/s10803-011-1376-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=157 [article] Practitioner’s Guide to Assessment of Autism Spectrum Disorders in Infants and Toddlers [Texte imprimé et/ou numérique] / Amanda MOSSMAN STEINER, Auteur ; Tina R. GOLDSMITH, Auteur ; Anne V. SNOW, Auteur ; Katarzyna CHAWARSKA, Auteur . - 2012 . - p.1183-1196. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 42-6 (June 2012) . - p.1183-1196 Mots-clés : Early diagnosis  Clinical evaluation  Infants and toddlers Index. décimale : PER Périodiques Résumé : Recent advances in clinical research have made it possible to diagnosis autism spectrum disorders (ASD) as early as the second year of life. The diagnostic process early in development is often complex, and thus, familiarity with the most recent findings in clinical assessment instruments, early symptoms, and developmental trajectories of young children with autism is essential. This paper provides an empirically based practitioner’s guide to issues and concerns related to early diagnosis of ASD in very young children, documentation of the course and patterns of ASD symptomatology in infants and toddlers, and current understanding in the field of diagnostic outcomes of children identified in the first and second year of life. En ligne : http://dx.doi.org/10.1007/s10803-011-1376-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=157

Sensitivity and specificity of the Modified Checklist for Autism in Toddlers and the Social Communication Questionnaire in preschoolers suspected of having pervasive developmental disorders / Anne V. SNOW in Autism, 12-6 (November 2008)  

Public ISBD [article]  inAutism > 12-6 (November 2008) . - p.627-644 Titre : Sensitivity and specificity of the Modified Checklist for Autism in Toddlers and the Social Communication Questionnaire in preschoolers suspected of having pervasive developmental disorders Type de document : Texte imprimé et/ou numérique Auteurs : Anne V. SNOW, Auteur ; Luc LECAVALIER, Auteur Année de publication : 2008 Article en page(s) : p.627-644 Langues : Anglais (eng) Mots-clés : M—CHAT preschoolers SCQ sensitivity specificity Index. décimale : PER Périodiques Résumé : This study assessed the psychometric properties of the Modified Checklist for Autism in Toddlers (M—CHAT) and the Social Communication Questionnaire (SCQ) in a sample of preschool children referred for possible pervasive developmental disorders (PDDs). The sample consisted of 82 children between the ages of 18 and 70 months (54 with a PDD diagnosis and 28 with non-PDD diagnoses). M—CHAT scores were analyzed for 56 children aged 18—48 months old and SCQ scores were analyzed for 65 children aged 30—70 months old. Optimal sensitivity and specificity were achieved using the cutoff score of any three items on the M—CHAT and lowering the cutoff score of the SCQ. The diagnostic agreement of both instruments was also compared in an overlapping subsample of 39 children aged 30—48 months. Overall, the M—CHAT and SCQ appear to more accurately classify children with PDDs who have lower intellectual and adaptive functioning. En ligne : http://dx.doi.org/10.1177/1362361308097116 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=643 [article] Sensitivity and specificity of the Modified Checklist for Autism in Toddlers and the Social Communication Questionnaire in preschoolers suspected of having pervasive developmental disorders [Texte imprimé et/ou numérique] / Anne V. SNOW, Auteur ; Luc LECAVALIER, Auteur . - 2008 . - p.627-644. Langues : Anglais (eng) in Autism > 12-6 (November 2008) . - p.627-644 Mots-clés : M—CHAT preschoolers SCQ sensitivity specificity Index. décimale : PER Périodiques Résumé : This study assessed the psychometric properties of the Modified Checklist for Autism in Toddlers (M—CHAT) and the Social Communication Questionnaire (SCQ) in a sample of preschool children referred for possible pervasive developmental disorders (PDDs). The sample consisted of 82 children between the ages of 18 and 70 months (54 with a PDD diagnosis and 28 with non-PDD diagnoses). M—CHAT scores were analyzed for 56 children aged 18—48 months old and SCQ scores were analyzed for 65 children aged 30—70 months old. Optimal sensitivity and specificity were achieved using the cutoff score of any three items on the M—CHAT and lowering the cutoff score of the SCQ. The diagnostic agreement of both instruments was also compared in an overlapping subsample of 39 children aged 30—48 months. Overall, the M—CHAT and SCQ appear to more accurately classify children with PDDs who have lower intellectual and adaptive functioning. En ligne : http://dx.doi.org/10.1177/1362361308097116 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=643

The structure of the Autism Diagnostic Interview-Revised: diagnostic and phenotypic implications / Anne V. SNOW in Journal of Child Psychology and Psychiatry, 50-6 (June 2009)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 50-6 (June 2009) . - p.734-742 Titre : The structure of the Autism Diagnostic Interview-Revised: diagnostic and phenotypic implications Type de document : Texte imprimé et/ou numérique Auteurs : Anne V. SNOW, Auteur ; Luc LECAVALIER, Auteur ; Carrie HOUTS, Auteur Année de publication : 2009 Article en page(s) : p.734-742 Langues : Anglais (eng) Mots-clés : Autistic-disorder pervasive-developmental-disorder assessment factor-analysis classification Index. décimale : PER Périodiques Résumé : Background: Multivariate statistics can assist in refining the nosology and diagnosis of pervasive developmental disorders (PDD) and also contribute important information for genetic studies. The Autism Diagnostic Interview-Revised (ADI-R) is one of the most widely used assessment instruments in the field of PDD. The current study investigated its factor structure and convergence with measures of adaptive, language, and intellectual functioning. Methods: Analyses were conducted on 1,861 individuals with PDD between the ages of 4 and 18 years (mean = 8.3, SD = 3.2). ADI-R scores were submitted to confirmatory factor analysis (CFA) and exploratory factor analysis (EFA). Analyses were conducted according to verbal status (n = 1,329 verbal, n = 532 nonverbal) and separately for algorithm items only and for all items. ADI-R scores were correlated with scores on measures of adaptive, language, and intellectual functioning. Results: Several factor solutions were examined and compared. CFAs suggested that two- and three-factor solutions were similar, and slightly superior to a one-factor solution. EFAs and measures of internal consistency provided some support for a two-factor solution consisting of social and communication behaviors and restricted and repetitive behaviors. Measures of functioning were not associated with ADI-R domain scores in nonverbal children, but negatively correlated in verbal children. Conclusions: Overall, data suggested that autism symptomatology can be explained statistically with a two-domain model. It also pointed to different symptoms susceptible to be helpful in linkage analyses. Implications of a two-factor model are discussed. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2008.02018.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=756 [article] The structure of the Autism Diagnostic Interview-Revised: diagnostic and phenotypic implications [Texte imprimé et/ou numérique] / Anne V. SNOW, Auteur ; Luc LECAVALIER, Auteur ; Carrie HOUTS, Auteur . - 2009 . - p.734-742. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 50-6 (June 2009) . - p.734-742 Mots-clés : Autistic-disorder pervasive-developmental-disorder assessment factor-analysis classification Index. décimale : PER Périodiques Résumé : Background: Multivariate statistics can assist in refining the nosology and diagnosis of pervasive developmental disorders (PDD) and also contribute important information for genetic studies. The Autism Diagnostic Interview-Revised (ADI-R) is one of the most widely used assessment instruments in the field of PDD. The current study investigated its factor structure and convergence with measures of adaptive, language, and intellectual functioning. Methods: Analyses were conducted on 1,861 individuals with PDD between the ages of 4 and 18 years (mean = 8.3, SD = 3.2). ADI-R scores were submitted to confirmatory factor analysis (CFA) and exploratory factor analysis (EFA). Analyses were conducted according to verbal status (n = 1,329 verbal, n = 532 nonverbal) and separately for algorithm items only and for all items. ADI-R scores were correlated with scores on measures of adaptive, language, and intellectual functioning. Results: Several factor solutions were examined and compared. CFAs suggested that two- and three-factor solutions were similar, and slightly superior to a one-factor solution. EFAs and measures of internal consistency provided some support for a two-factor solution consisting of social and communication behaviors and restricted and repetitive behaviors. Measures of functioning were not associated with ADI-R domain scores in nonverbal children, but negatively correlated in verbal children. Conclusions: Overall, data suggested that autism symptomatology can be explained statistically with a two-domain model. It also pointed to different symptoms susceptible to be helpful in linkage analyses. Implications of a two-factor model are discussed. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2008.02018.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=756

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