The decade of the 1960s witnessed early attempts to create a unified science-profession of clinical psychology. Following in the path of these efforts, Donald Peterson set out to write what he describes in his new introduction as a 'manifesto' for a 'scientifically grounded, practically effective professional psychology.'

The decade of the 1960s witnessed early attempts to create a unified science-profession of clinical psychology. Following in the path of these efforts - and the behavioral revolution in clinical psychology, which occurred around the same time - Donald Peterson set out to write what he describes in his new introduction as a "manifesto" for a "scientifically grounded, practically effective professional psychology." Originally published by Appleton-Century-Crofts in 1968.