Assessment of quality of life (QoL) and use of this information toward
s improvement of health carl services is an important area of activity
of the World Health organization (WHO). This paper briefly discusses
the conceptual basis and the methodology used in WHO's Quality of Life
Project (WHOQOL). It describes the simultaneous development of instru
ments in widely different cultures to assess subjective QoL. Use of th
ese instruments in the field of clinical trials with psychotropics is
highlighted.