ABSTRACT
The lack of insight is one of the most common symptoms in schizophrenia, and may be associated with reduced quality of life (Wiffen et al., 2010), poor treatment adherence, increased number of hospitalizations, as well as poor social cognition (Quee et al., 2011; Weiler, Fleisher & McArthur-Campbell, 2000). Despite its clinical importance, it remains a complex and poorly understood phenomenon in psychosis and other clinical conditions in which it occurs. The current chapter focuses on insight in psychosis, although we start with defi nitions and description of insight defi cits in different population groups.
