AnhedoniaLongitudinal StudiesPleasureAffective SymptomsSchizotypal Personality DisorderHappinessSchizophrenic PsychologySchizoid Personality DisorderPhilosophyDepressionRewardAffectIrritable MoodPsychiatric Status Rating ScalesDepressive Disorder, MajorSchizophreniaExpressed EmotionPsychometricsSelf StimulationMotivationFood PreferencesSocial BehaviorEmotionsStress, PsychologicalQuestionnairesPsychotic DisordersImmobility Response, TonicRisk FactorsMood DisordersFollow-Up StudiesNational Longitudinal Study of Adolescent HealthCognition DisordersProspective StudiesDepressive DisorderSocial AdjustmentSucroseNeuropsychological TestsSubliminal StimulationSex FactorsDysthymic DisorderAgingDepressive Disorder, Treatment-ResistantSocial Behavior DisordersTime FactorsMotion Pictures as TopicCross-Sectional StudiesFacial ExpressionBehavior, AnimalAnalysis of VarianceConnectomeCohort Studies