I am interested in the effects of numerous and rapid social changes on individuals. For instance, I have conducted studies in Russia, Mongolia, Kirghizstan, in organizations and with Quebec immigrants. My research interests mainly revolve around questions concerning such concepts as social identity and relative deprivation. I am fascinated by long-term changes in social identity and the integration of multiple, conflicting identities.

Health psychology: Cancer, quality of life and mental health - Consequences on patients and their families of surgery, chemotherapy and radiotherapy treatments: psychiatric symptoms, marital relations, sexual dysfunctions, social support network, body image, communication, defence mechanisms, etc. Epidemiological study of Quebeckers' mental health: rate of psychiatric disorders in various ethnic groups, by gender, ethnicity, impact of immigration, length of stay, etc.

Intercultural psychology: adaptation of immigrants and ethnic groups from different countries (Haiti, Morocco, Lebanon, Italy, etc.) or of different religions (Catholic, Protestant, Jewish, Muslim). Adaptation in psychological, social, professional, psychiatric, family and other terms. Comparative analysis of means of acculturation, family structures, identity processes, discrimination, endogamous and exogamous marriages, etc.