Evaluation Of A Behavioural Treatment Program For Dementia DoyleColleen 2017 While behaviour modification has been used to manage behaviour disorders associated with intellectual disability in children for many years, its use in determining the effect of the social environment on institutionalised older adults is far less prevalent. This paper reports on an intervention trial to treat inappropriate vocalising in severely cognitively impaired psychogeriatric patients, its evaluation and its theoretical underpinnings.