PY 352 Lecture Notes - Lecture 32: 18 Months, Heritability, Twin Study
2 Dec 2017
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Early behavior aimed at harming others: conflicts over objects are very common between 12 and 18 months of age, especially with siblings, after 18 months, physical attacks become more common (e. g. hitting, pushing) Cold instrumental aggression: serves the aggressors; instrumental purposes, not personal, not targeted, no feelings of hostility or hate. Hold reactive aggression: targeted, personal, feelings of hate, anger, and other strong negative emotions, can be spontaneous and in the moment or planned and retaliatory. Aggression during preschool: temper tantrums diminish during the preschool period and are mostly gone by 4 years, growth in language permits verbal, aggression peaks about 3 years of age and begins declining, aggression changes from hot to cold. Aggression during the grade school years: continued decline especially physical. Increasingly engage in highly visible, dangerous, and salient forms of aggression or antisocial behavior. Consistency of aggression over time: aggression is unstable. Intense negative emotions: high activity level, lack of behavioral control and inhibition, distractibility.
