1 a Department of Education and Counselling Psychology , McGill University , Montreal , QC , Canada.
2 b Clinical Psychology , Concordia University , Montreal , QC , Canada.

Objective: The present paper attempts to differentiate client involvement from other, similar process variables and presents a pan-theoretical conceptualization of client involvement.

Method: A modified Delphi poll was conducted with 20 experienced clinicians and researchers. In two rounds of data collection, the experts completed a questionnaire designed to elicit their feedback on whether a variety of involvement items were representative of our pan-theoretical definition of client involvement.

Results: The results of the survey provide insight into which types of client activities are good representations of client involvement.

Conclusion: We propose that client involvement can be understood as being comprised of behavioral, cognitive, and emotional elements, and we provide concrete examples of these activities.