This article describes a psychotropic PRN Evaluative Tool developed by interprofessional clinicians to address inconsistent reporting and assessment of the effectiveness of PRN medications used for people who are developmentally disabled. Fifty-nine participants (37 males, 22 females), ages 16 to 60 years, were included in the review, all…

Identifying emotions in people with severe and profound intellectual disabilities is a difficult challenge. Since self-reports are not available, behaviour is the most used source of information. Given the limitations and caveats associated with using behaviour as the sole source of information about their emotions, it is important to supplement…

We conducted three experiments to reproduce and extend Perone and Courtney's (1992) study of pausing at the beginning of fixed-ratio schedules. In a multiple schedule with unequal amounts of food across two components, they found that pigeons paused longest in the component associated with the smaller amount of food (the lean component), but only…

Background: Few studies have investigated functional and behavioural variables of Cornelia de Lange Syndrome (CdLS) in a large sample of individuals. The aim of this study is to provide greater insight into the clinical, behavioural and cognitive characteristics that are associated with CdLS. Methods: In total, 56 individuals with CdLS…

MANY OF THE REPORTED BEHAVIORAL DIFFERENCES BETWEEN FAMILIAL RETARDATES AND NORMAL CHILDREN OF THE SAME MOTOR ABILITY ARE PRODUCTS OF A VARIETY OF DIFFERENCES IN MOTIVATION RATHER THAN PERMANENT EFFECTS OF MENTAL RETARDATION ITSELF. MANY RESEARCHERS, HOWEVER, HAVE TAKEN THE POSITION THAT MENTAL RETARDATES ARE INHERENTLY "DIFFERENT." THIS…

Background: Prader-Willi syndrome (PWS) is associated with a characteristic behavioural phenotype whose main features are, alongside compulsive hyperphagia, deficits in social behaviour: social withdrawal, temper tantrums, perseverative speech and behaviour, mental rigidity, stereotyped behaviour, impulsiveness, etc. Similar symptoms may also be…

Compares the affective reactions of nonretarded second- and third-grade children to those of mildly retarded children to a videotape in which a protagonist's initial behavior (good, bad) was factorially varied with the emotion he experienced in the concluding incident (happy, sad). (HOD)