The trusted core disability textbook gets a comprehensive update in this second edition, now thoroughly revised to include all the critical topics today's professionals need to know about as they work with people who have intellectual and developmental disabilities. Brought to you by a new team of world-renowned experts and contributors, this…

This paper includes a nontechnical description of methods for calculating effect sizes in intellectual and developmental disability studies. Different hypothetical studies are used to illustrate how null hypothesis significance testing (NHST) and effect size findings can result in quite different outcomes and therefore conflicting results. Whereas…

The article reviews the ways in which norm-referenced developmental age (DA) and developmental quotient (DQ) evaluation data are currently reported in preschool early intervention program evaluation studies. The concept of intervention DQ in contrast with pretest DQ is proposed as a more meaningful way to report evaluation data. (Author/DB)

Federal laws mandate that students with cognitive disabilities receive instruction in academic skills and also support the importance of teaching self-determination. The purpose of this literature review was to synthesize intervention research examining effects of self-determination interventions on academic skills for students with cognitive…

This article discusses problems inherent in the analysis of automatically reinforced behaviors, which are behaviors that are maintained by operant mechanisms independent of the social environment. Four classes of treatment that are compatible with automatic reinforcement are reviewed, including manipulations of establishing operations, sensory…

After finding that self-injurious behavior in two young males with developmental disabilities was negatively reinforced by escape from instructional activities, an intervention provided noncontingent escape on a fixed schedule and differential negative reinforcement of other behavior. Provision of escape, even when noncontingent, resulted in…

This study describes the development of the Active Treatment Client Rights checklist (ATCR), which was designed to facilitate the assessment, monitoring, and implementation of readily observable client active treatment services for adults with developmental disabilities. The ATCR was found to be highly reliable, valid, and useful in enhancing…

This research review concerning intervention to improve young children's social behavior and strategies for promoting generalization and maintenance of young children's social responding focuses on taking advantage of natural communities of reinforcement, training diversely, and incorporating functional mediators. Implications for interventionists…

In this preliminary study, three parents who requested outpatient services for treatment of developmentally disabled children's problem behavior were taught to implement multiple treatment components. Therapists employed the most cost-efficient method first (i.e., written and verbal instructions) to teach prescribed behavior management strategies.…

This paper reviews the literature on functional assessment in the behavioral treatment of aggression in persons with mental retardation or developmental delays. Increased use of functional assessment and skill training is noted but no concomitant decrease in the use of intrusive procedures. (Author/DB)

This meta-analysis of the developmental disabilities literature on remediation of problem behaviors evaluated relations between standards of practice, intervention and participant characteristics, and treatment validity. Results largely failed to support widespread assumptions of clinical practice such as the superiority of more intrusive…

The Verbal Interaction Analysis System is presented as an assessment of initial, dyadic conversations. Application of the VIAS to two case studies featuring mildly to moderately intellectually disabled adults shows how the VIAS provides an index of competence and assists in the development of specific treatment strategies. (Author/JDD)

This study presents three cases of adults with profound developmental disabilities in which assessment data showed that self-injurious behavior occurred in at least two test conditions and describes a method used to analyze the effects of treatments based on hypotheses of multiple control. (Author/DB)

This study reviewed 113 research articles involving 299 subjects and a corresponding sample of 299 adaptive skill programs implemented in state-funded residential facilities for adults with developmental disabilities. Statistical analysis revealed significant differences between researchers and clinicians in adaptive and maladaptive behavior…

Parents (n=79) of children with autism and related disabilities were surveyed about their children's challenging behaviors and what resources were needed to manage these behaviors. A high frequency of such behaviors was reported. Contingency management was the most effective management approach. Results are discussed in terms of families' needs,…