AnhedoniaPleasureAffective SymptomsSchizotypal Personality DisorderHappinessSchizoid Personality DisorderSchizophrenic PsychologyPhilosophyRewardAffectIrritable MoodDepressionDepressive Disorder, MajorSchizophreniaSelf StimulationMotivationExpressed EmotionPsychiatric Status Rating ScalesEmotionsFood PreferencesPsychometricsSocial BehaviorImmobility Response, TonicStress, PsychologicalPsychotic DisordersMood DisordersSucroseBehavior, AnimalSubliminal StimulationDysthymic DisorderSocial Behavior DisordersQuestionnairesDepressive Disorder, Treatment-ResistantFacial ExpressionPerceptual DistortionConnectomeAnticipation, Psychological