Why a Psychologist doesn't Need to be a Constructivist

The social constructionist movement aims to renew categories and concepts that have been neglected by cognitivist psychology and to claim the main role of psychology as representative of the Geisteswissenschaften. However, according to constructionism, to claim this role is tantamount to turn from a realist to a constructivist view if mind and reality. On the base of reflections upon modern philosophy (John Locke, George Berkely) and contemporary psychology (George Kelly, Jerome Bruner), I surmise that the necessity to move from realism to constructivism in order to safeguard the autonomy of psychology as a social science is only an apparent one.