Most theorists in the realm of psychotherapy have not behaved like det
ached, impartial scientists but like itinerant proselytizers. In more
recent times, a bias of a different kind has entered the field. ''Herm
eneutics,'' ''social constructionism,'' and ''post-positivism,'' altho
ugh by no means synonymous, all offer a worldview that differs from es
tablished tenets of scientific data collection and objective measureme
nt. These complex intellectual traditions emphasize that recordings of
reality are mere projections and creations of the observer. The doubl
e impact of subjectivity and bias renders little hope for an optimisti
c future. A possible solution lies in the expansion of a broad-based s
ocial and cognitive learning theory that incorporates testable notions
and empirically based clinical observations.