Prevalence and types of aggressive behaviour among adults with intellectual disabilities.

BACKGROUND: Aggressive behaviours represent major obstacles to the integration into society of individuals with intellectual disability (ID) and pose significant management issues for carers. METHODS: The present study assessed the prevalence and severity of five types of aggressive behaviours in 3165 adult men and women with ID receiving services from three rehabilitation agencies in Québec by surveying their carers using the Modified Overt Aggressive Scale. RESULTS: The 12-month prevalence of aggressive behaviour was 51.8%: 24% property damage, 37.6% verbal, 24.4% self-oriented and 24.4% physical aggression, and 9.8% sexually aggressive behaviour, most of which being mild in severity. Only 4.9% of individuals displayed aggressive behaviour leading to injury of the victim. Few gender differences were observed. CONCLUSIONS: The capacity to document and assess the types as well as the severity of aggressive behaviour is thus critical, not only to better understand the correlates of various types of behaviours but also to orient intervention programmes whether they be prevention, assessment, monitoring or management of aggressive behaviour.

Cross-cultural study of person-centred quality of life domains and indicators: a replication.

BACKGROUND: The increased use of the quality of life (QOL) concept internationally suggests the need to evaluate its etic (universal) and emic (culture-bound) properties. This study replicated and expanded a previous cross-cultural study on QOL. METHOD: The three respondent groups (consumers, parents and professionals; total n = 781) were from four European countries: France, Belgium, Italy and Poland. The Cross Cultural Survey of Quality of Life Indicators was used to assess the importance and use of eight core dimensions of QOL. Two hypotheses were tested: (1) the etic properties would be demonstrated if there were similar profiles for the respondent and geographical groups, and if indicators grouped into the proposed QOL domains; and (2) the emic properties would be demonstrated if there were significant differences on scores across groups. RESULTS: Results supported both hypotheses. CONCLUSION: The present study replicated the findings of a large cross-cultural study that the QOL construct has both etic and emic properties.

The relationship between quality of life and self-determination: an international study.

BACKGROUND: The aim of this study was to evaluate the relationship between self-determination and quality of life (QOL) of persons with intellectual disabilities (ID) living in four countries (Canada, United States, Belgium and France). METHOD: Participants were 182 adults with mild ID living in community settings (with families, living independently or in supported living environments). QOL was measured with the Quality of Life Questionnaire. Self-determination was measured using the Adult version of The Arc's Self-Determination Scale. Discriminant function and correlational analyses were conducted. RESULTS: Discriminant function analysis indicated that essential characteristics of self-determination predicted membership in the high QOL group and that overall self-determination and QOL were significantly correlated, as were sub-scale scores. CONCLUSIONS: The study replicates findings from a previous study with an international sample and confirms the importance of self-determination to enhance QOL. Subsequent research should examine the direction of the relationship between self-determination and QOL and examine the relationship of essential characteristics of self-determined behaviour and core domains of QOL in greater detail.