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Objective: To investigate differences in comorbid psychopathology rates between individuals who meet criteria of Autism Spectrum Disorders (ASDs) according to DSM-5 or the DSM-IV-TR. Methods: Comorbid psychopathology was measured using the Autism Spectrum Disorders- Comorbid for Children. 424 individuals between the ages of 2 and 18 years of age; including children who met criteria for an ASD according to the DSM-5, the DSM-IV-TR only, and a control group that did not meet either set of criteria. Results: Of the ASD participants, 36% would no longer meet criteria according to proposed DSM-5. Comorbidity rates for the ASD groups were significantly different from the control group; however, ASD groups were not significantly different in terms of total comorbid psychopathology. Conclusion: The results elucidate the need for further research regarding services and treatments for those individuals that will no longer meet criteria for an ASD but still have significant rates of comorbid psychopathology. [ABSTRACT FROM AUTHOR]

Highlights: [•] Debate exists over the nature of autism spectrum disorders (ASD). [•] Identifying symptoms that best differentiates ASD from other developmental disorders is warranted. [•] Major changes in the DSM criteria for ASD break up continuity in defining and treating the disorder. [Copyright &y& Elsevier]

Objective: The aim of the current study is to investigate challenging behavior in children who may no longer meet criteria for an autism spectrum disorder (ASD) diagnosis according to the proposed fifth edition of the Diagnostic and Statistical Manual ( DSM-5). Method: Children and adolescents ( n = 459) were separated into three groups including those who met criteria for ASD according to the DSM-5 criteria ( n = 219); those who will no longer qualify for an ASD diagnosis according to the DSM-5 but met criteria according to the DSM-IV-TR ( n = 109); and a control group ( n = 131). Scores on the Autism Spectrum Disorders - Problem Behaviors for Children (ASD-PB-C) were compared among groups. Results: The DSM-5 captured a slightly more impaired population in terms of problem behavior. Conclusion: Implications regarding access to treatment for those no longer meeting criteria need to be taken into consideration in the coming months. [ABSTRACT FROM AUTHOR]

Highlights: [ • ] Challenging behaviors (CB) commonly co-occur with autism spectrum disorder (ASD). [ • ] Some children with a current ASD diagnosis will not meet DSM-5 ASD criteria. [ • ] Toddlers diagnosed under DSM-5 and DSM-IV-TR only exhibit similar behavior problems. [ • ] Those likely to lose ASD diagnoses will continue to need service provision. [•] Effects of diagnostic changes on service provision warrant careful consideration. [Copyright &y& Elsevier]