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The impact of anger between adults on siblings' emotions and social behavior.

Peer and sibling dyads (older children = 5-7 years; younger children = 2-5 years) were presented with simulations of friendly, angry, and resolution interactions between a male adult and the mother in the context of play sessions. Expressions of positive effect increased among female siblings during the anger period and continued to be more common in the resolution period than in other groups. Prosocial behavior among male siblings greatly increased in the resolution period, with siblings generally more prosocial towards each other than peers in this period. The findings suggest that siblings may attempt to buffer each other from the stress of exposure to adults' discord.

Anger↗

Effects of chronic d-amphetamine on social behavior of the rat: implications for an animal model of paranoid schizophrenia.

Hooded rats in a social colony were given increasing daily doses of d-amphetamine up to 8 mg/kg. Time-lapse 16 mm cinematographically recorded behavior was analyzed for the following: grooming, feeding, sex, sleeping, resting, sterotypy, agonistic behavior, muricidal activity, and the location and movement of each rat. Subordiant rats receiving d-amphetamine actively withdrew from social interactions by retreating to strategically defensible locations in the environment. They remained hypervigilant of other rats and overreacted to their approaches by either fleeing or by defensively rearing and "boxing". On the other hand, when the dominant rat received the maximum dose, it seemed totally oblivious to the other rats. The responses to drug treatment in subordinant rats may provide a model for the social behavior of frightened paranoid schizophrenics.

Animals↗