[1] He has served as editor-in-chief of the Canadian Journal of Behavioural Science (1985–89) and Pain Research & Management (2006–17).
He has received many honours and distinctions, including appointment as an Officer of the Order of Canada in 2016.
He also served as a Canadian Institutes of Health Research Senior Investigator and a Canada Council I.W.
[2] His research addresses psycho-social features of pain with a focus on pain assessment, particularly in populations with communication limitations, including infants, children and people with cognitive impairments.
He pioneered development of measurement tools for pain in infants, young children, people with intellectual disabilities and persons with dementia, primarily focusing upon nonverbal behaviour and facial expression.