AnhedoniaPleasureAffective SymptomsSchizotypal Personality DisorderHappinessSchizophrenic PsychologyDepressionSchizoid Personality DisorderPhilosophyAffectIrritable MoodRewardPsychiatric Status Rating ScalesSchizophreniaDepressive Disorder, MajorSelf StimulationPsychometricsExpressed EmotionMotivationFood PreferencesEmotionsPsychotic DisordersSocial BehaviorImmobility Response, TonicStress, PsychologicalMood DisordersQuestionnairesDepressive DisorderSeverity of Illness IndexSucroseDysthymic DisorderSubstance Withdrawal SyndromeSocial Behavior DisordersSubliminal StimulationDepressive Disorder, Treatment-ResistantAnxietyAntidepressive AgentsBehavior, AnimalSymptom AssessmentConnectomeFacial ExpressionPerceptual Distortion