The number of children identified as having intellectual or developmental disability is rising worldwide and their education has been found wanting. It has been said that "they simply need better teaching." At the same time, there is an increasing evidence base that pedagogy that is based on the discipline of behaviour analysis offers…

In the United States, research directed specifically at improving our understanding of the psychiatric assessment and treatment of individuals with intellectual disabilities (ID) has grown, yet lags far behind efforts for typically developing children and adults. In the United States, a lack of a national approach to the mental health problems of…

The assessment of maintaining variables with the goal of developing prosocial intervention plans has become a driving force in the intellectual disabilities (ID) literature. One particularly crucial variable is whether the behavior is low or high rate and whether the challenging behavior is best characterized by self-injury or aggression. Because…

Sensitivity theory attempts to account for the variability often observed in challenging behavior by recourse to the "aberrant motivation" of people with intellectual and developmental disabilities. In this article, we suggest that a functional analysis based on environmental (challenging environments) and biological (challenging needs) motivating…

Since many problem behaviors of individuals with mental retardation are maintained by multiple functions, this project developed the Functional Assessment for multiple CausaliTy (FACT), an informant-based, forced-choice measure designed to identify the most prominent function associated with the occurrence of problem behaviors. This paper…

Several methods for evaluating the influence of antecedents on challenging behaviour have been described in the literature, however the portability of these methods within the classroom has been questionable. The purpose of this paper will be to provide a practical understanding of evidence-based practices used in the assessment and management of…

As a result of inherent cognitive and language difficulties, individuals with mental retardation/developmental disabilities often are considered difficult to assess appropriately. When cognitive and language difficulties occur in conjunction with behavioral issues, this difficulty is compounded. The IDEA requirement to include a form of…

In the last few decades, the field of dual diagnosis as applied to those with intellectual disabilities has boasted a monumental surge in assessment devices and treatment approaches. These relatively recent advances include those in the development of behavior modification principles and procedures that have had a dramatic impact on services for…

The purpose of this article is to provide the reader with an orientation to the concepts and principles of autonomy and self-determination and the application of those concepts and principles to working with children and adolescents who have intellectual and developmental disabilities (ID/DD), including autism. Self-determination is essentially…