Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by restricted, repetitive patterns of behavior and interests (RRBIs). With the latest update to the Diagnostic and Statistical Manual of Mental Disorders, a severity level rating is assigned to the two core features of ASD (American Psychiatric Association in Diagnostic…

Frequency of repetitive and/or restricted behaviors and interests (RRBIs) was assessed in 140 adults with autism spectrum disorders (ASDs) and severe or profound intellectual disability (ID). The associations of gender and age range were analyzed with RRBI frequency which was obtained using the Stereotypies subscale of the "Diagnostic…

The purpose of this paper was to further establish the validity of the Autism Spectrum Disorder-Diagnostic for Children (ASD-DC). The methodology consisted of testing the similarity of findings between the ASD-DC and the Autism Diagnostic Interview-Revised (ADI-R), which proved to be statistically significant for subscale content scores on social,…

Research into behavior problems among individuals with mental retardation has been well developed. However, few studies have addressed the effect of multiple problem behaviors on social skills. In the present study, the authors examined the relationship between two problem behaviors, stereotypy and self-injury, and social skills among individuals…

Mentally retarded emotionally disturbed children (N=31) were compared on the Child Depression Inventory and the Child Behavior Profile with 31 children in a normal school setting. Correlational data showed a strong relationship between the cut-off scores for both measures suggesting that similarities exist between depression in mentally retarded…

Seizures can be debilitating across a number of physical, social, occupational, and personal variables. Given the deficits in all of these areas frequently present in persons with mental retardation, effective assessment and subsequent treatment of seizures is a primary goal for individuals with both mental retardation and epilepsy. To thoroughly…

The relationships between social skills and psychopathology in 846 individuals with severe mental retardation was examined. Results showed that increases in psychopathological symptoms were related to increases in negative behaviors. Those without stereotypic movement disorders had greater general positive and positive nonverbal behaviors than…

This study examined three maladaptive behaviors, self-injurious behavior (SIB), stereotypies, and aggression in 36 adults with either autism, pervasive developmental disorder not otherwise specified (PDD-NOS), and mental retardation. Findings indicated that, for all three diagnostic categories, aggression was primarily maintained for attentional…

Social skills and levels of inappropriate assertiveness/impulsiveness were assessed using the Matson Evaluation of Social Skills with Youngsters, with 17 autistic children (ages 2-21) and 17 matched nonautistic children. Significant differences in both appropriate and inappropriate social behaviors were found. Results suggest the importance of…