Archivist and Principle Researcher, University of Illinois
Parental alienation is an act by a parent that tries to denigrate and destroy the relationship between a child and the other targeted parent. (Read my related column "10 Facts About Parental Alienation.")
Parental Alienation Syndrome is commonly referred to as the effect of parental alienation.
A conference I attended last year, the Canadian Symposium for Parental Alienation Syndrome, focused on the state of research, intervention, and the status of Parental Alienation Syndrome for inclusion in the fifth edition of Diagnostic and Statistical Manual of Mental Disorders (DSM-5).