The relationship between preferred objects associated with stereotypy, stereotypic behavior, and accuracy of responding during a counting task by a child with autism was analyzed. Teaching with high-preference objects occasioned more stereotypic behavior and less accurate counting than teaching with medium- and low-preference objects. (Author/DB)

In response to a previous article proposing perceptual reinforcement of stereotyped movements in autistic and mentally retarded persons, it is argued that this theory fails to take into account biological findings and theory regarding pathological stereotyped acts. An alternative theory derived from neurological concepts is suggested. (Author/DB)

The authors respond to criticism of their paper proposing a perceptual reinforcement of stereotyped movements in autistic and mentally retarded persons. The alternative theory based on neurobiological factors is judged to be insufficiently detailed and inadequate in scope. (Author/DB)

Interviews with parents of 30 school-age girls with fragile X syndrome (fraX) and 31 age- and IQ-matched controls concerning autistic behaviors found that girls with fraX had significantly more autistic behaviors than controls, but incidence of autistic behaviors was not correlated with IQ. Anxiety and posterior cerebellar area measures were also…

The study compared the attention-directing behaviors of 15 autistic children, 14 children with developmental language delay, and 13 young normal children. Although the autistic children's behavior was most unlike that of the other groups, autistic children did not produce more attention-directing behavior when a high degree of adult direction was…

The relationship between abnormal stereotyped behaviors and abnormal focused affections was examined in 20 children (ages 7-13) with developmental disabilities. Results include all children with abnormal focused affections exhibited stereotypes; abnormal focused affects could be studied reliably in this population through several methodologies;…

An ecological method was used to assess the patterns of goal-directed behaviors of eight children with autism and eight chronological and mental age comparable children with Down syndrome. Analysis of quantitative and qualitative behavior coding indicated that children with autism exhibited shorter and less overlapping goal-directed behaviors,…

The effectiveness of fenfluramine with hyperserotonergic autistic individuals (n=28 and ages 6-30) was evaluated. Evaluation of videotape recordings of individual behaviors suggested that fenfluramine failed to increase communicative behaviors or decrease stereotypic behaviors and inappropriate behaviors although a serotonergic effect was found in…

Self-injurious behavior was examined in a case study of head-banging by an 8-year-old girl with profound mental retardation and an autistic disorder. Trajectories of arm movements and impact forces were determined from dynamic analysis of videotapes. Cycle-to-cycle consistency in the qualitative dynamics of the limb motions and impact forces…

This study compared 23 children with high-functioning autism with 12 children with Asperger syndrome using DSM-IV diagnostic criteria. Findings indicated few group differences in current functioning but many early history differences. The Asperger syndrome group generally demonstrated less severe early symptoms, a milder developmental course, and…

This article reviews the developmental profile of a child with autism during the first 3 years of life. Analysis of home videos showed how the child appeared to make progress up to 12 months followed by decreases in social interaction, communication, and language. Discussion suggests that this particular profile is one of the possible pathways…

This case study of two young males (ages 3 and 5) with autism who have preoccupations with feminine activities and objects addresses the establishment of gender identity in children with autism and the need for further study of the complex interplay of environmental and neurobiologic factors affecting gender identity and preoccupations in autism.…

This study examined Autism Diagnostic Interviews Revised (ADI-R) data for 69 autistic subjects from multiplex (MP) families (with more than one autistic member) and 88 autistic subjects from singleton (SP) families (with only one autistic member). Multivariate analysis revealed no differences between verbal or nonverbal MP and SP groups for ADI-R…

This case study of a toddler with autism whose parents had videotaped her development from birth showed that the child's behavior and development were essentially normal for the first year but that she then became withdrawn in only a few months. It is suggested that early communicative screening tests might have identified the child's earliest…

Direct observational data were collected on the behavior of 26 elementary school-age boys with fragile X syndrome (FXS), the most prevalent inherited cause of mental retardation, during classroom academic activities. Findings indicated classroom engagement comparable to that of peers and not related to intrasubject variables such as severity of…