Fig. 1.

Schematic Representation of Negative or Deficit Symptoms, With Avolition Representing the Primary Construct. Loss of appetitive drive is associated with clinical features that are observable in altered individual/social behaviors and rapidly translates to a gradual functional deterioration that can be observed during schizophrenia's prodrome and in advance of psychotic symptoms. While affective features may be present, this is not synonymous with anhedonia. Individuals can experience pleasure; however, what is perceived as pleasurable may no longer be in line with the individual's premorbid capacity for goal seeking and related value system.