LonelinessSocial IsolationSocial BehaviorSocial SupportSocial EnvironmentArvicolinaeStress, PsychologicalInterpersonal RelationsSocial PerceptionProjective TechniquesDepressionHealth StatusBehavior, AnimalSocial AdjustmentPolydipsiaAnxietyQuestionnairesLegal GuardiansHousing, AnimalAdaptation, PsychologicalEmotionsChicagoSocial ClassLongitudinal StudiesSocioeconomic FactorsSocial IdentificationHandling (Psychology)Social DominanceQuality of LifeDepressive Disorder