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BACKGROUND The development of reliable, valid measures of psychopathology in people with intellectual disabilities is an important task. However, independent replication studies are rarely reported. AIMS To report data on the psychometric properties of the Psychiatric Assessment Schedule for Adults with Developmental Disabilities (PAS-ADD) Checklist. (More)
We examined behaviour management problems as predictors of psychotropic medication, use of psychiatric consultation and in-patient admission in a group of 66 adults with pervasive developmental disorder (PDD) and intellectual disability (ID) and 99 controls matched in age, gender and level of ID. Overall, people with PDD had higher rates of most DAS(More)
The inter-rater and test-retest reliabilities, and internal consistencies of the Reiss Screen for Maladaptive Behavior (Reiss 1987) were evaluated on a random sample of adults with moderate through profound mental retardation living in an institutional setting. Generally, the Reiss Screen showed good inter-rater reliability, modest to good test-retest and(More)
The Aberrant Behaviour Checklist was administered to 209 British mentally handicapped adults in two large residential facilities. This sample included a substantial proportion (45%) of non-ambulant people not included in previous studies. The five-factor solution originally reported by Aman et al. (1985a) was replicated using both four-point ratings and(More)
Thirty adults with Prader-Willi syndrome (PWS) were compared with 30 adults with non-specific learning disability matched for age, sex and severity of mental retardation. Maladaptive behaviour was assessed with the Aberrant Behavior Checklist (ABC), a 58-item structured interview which rates behaviours from 0 (not a problem) to 3 (severe problem) and which(More)
There have been few studies of psychopathology in adult with autism. This study examined psychiatric co-morbidity in 147 adults with intellectual disability (ID) and autism and 605 adults with ID but without autism. After controlling for the effects of gender, age, psychotropic medication and level of ID, people with autism and ID were no more likely to(More)
A meta-analytic study on effectiveness of behavioral and psychotherapeutic treatments for challenging behaviors in individuals with mild mental retardation is reported. Eighty articles were examined. For each comparison, several study variables and two effect sizes (percentage of nonoverlapping data-PND and percentage of zero data-PZD) were evaluated (Ms =(More)
Imitation is an essential skill in the acquisition of language and communication skills. An initial phase in teaching young children with autism to engage in appropriate affective responding may be to teach the imitation of facial models. Using a multiple baseline across participants design, imitation training (consisting of modeling, prompting,(More)
This study extends an operant methodology for the analysis of variables which control aberrant responses displayed by mentally handicapped people. The proportion of time spent in individual, stereotyped topographies by three profoundly mentally handicapped subjects was observed by momentary time-sampling whilst they were repeatedly exposed to four analogue(More)
Researchers have paid increasing attention to mental health issues in adults with autism spectrum disorders (ASDs) over the last decades. However, little is known about how rates of clinical referrals, types of mental health diagnoses and treatment in adults with ASDs and intellectual disability have changed. We examined patterns of change in referral(More)