Social IsolationSocial BehaviorLonelinessSocial SupportArvicolinaeSocial EnvironmentStress, PsychologicalBehavior, AnimalPolydipsiaHousing, AnimalSocial PerceptionSocial ClassAnxietyHandling (Psychology)Interpersonal RelationsSocial AdjustmentResearch PersonnelSocial DominanceSocial MediaSensory GatingSocial SciencesQuestionnairesSocial WorkStartle ReactionCorticosteroneHierarchy, SocialPregnanoloneAdaptation, PsychologicalDepressionAnalysis of VarianceReceptors, Corticotropin-Releasing HormoneAggressionSocioeconomic FactorsPituitary-Adrenal SystemHealth StatusArrhythmia, SinusMotor ActivityDepressive DisorderQuality of LifeRestraint, PhysicalSocial ChangeSocial DistanceEmotionsSex FactorsResidence CharacteristicsHypothalamo-Hypophyseal SystemHealth Status IndicatorsOxytocinSocial ValuesSocial ConditionsRisk FactorsUnemploymentAge FactorsFearUnited StatesSocial Problems