In the current study, we examined adaptive skills and trajectories over time in 257 individuals with Angelman syndrome (AS) using the Vineland Adaptive Behavior Scales, 2nd Edition. Multilevel linear models were used to examine differences between molecular subtypes over time, from one year to 13 years of age, in the adaptive domains of…

Although the early behaviors associated with autism spectrum disorder have been well characterized, many behaviors are also commonly observed in young children with other developmental delays and even in those with typical development. Therefore, consideration must be given to whether a child demonstrates sufficient autism spectrum disorder…

Motor and social difficulties are often found in children with an autism spectrum disorder (ASD) and with developmental coordination disorder (DCD), to varying degrees. This study investigated the extent of overlap of these problems in children aged 7-10 years who had a diagnosis of either ASD or DCD, compared to typically-developing controls.…

The Child Behavior Rating Form (CBRF) was adapted for use with children having mental retardation and was named the Nisonger CBRF. Independent factor analyses of parent and teacher ratings for 369 children produced 2 Social Competence subscales and 6 Problem Behavior subscales. Internal consistency was generally high and parent-teacher agreement…

Factor analysis of the Childhood Autism Rating Scale found three factors: (1) social impairment, (2) negative emotionality, and (3) distorted sensory response. Subjects with autism were distinguished from subjects with either pervasive or nonpervasive developmental disorders by higher scores on social impairment. Negative emotionality was most…

A comparison between parent and teacher ratings of 109 school children on the French version of the Nisonger Child Behavior Rating Form, which measures social competence and problem behaviors of children with developmental disabilities, was conducted. Ratings differed significantly on three problem behavior subscales: conduct problem,…

The Child Development Rating Scales (CDRS) is a parent-administered adaptive behavior assessment instrument for use with children whose developmental age is birth through 5 years and whose chronological age is birth through 8 years. The scale was developed in order to conduct research on parents' abilities to assess a wide range of skills in their…