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Degnan, Kathryn A.; Calkins, Susan D.; Keane, Susan P.; Hill-Soderlund, Ashley L. – Child Development, 2008
Disruptive behavior, including aggression, defiance, and temper tantrums, typically peaks in early toddlerhood and decreases by school entry; however, some children do not show this normative decline. The current study examined disruptive behavior in 318 boys and girls at 2, 4, and 5 years of age and frustration reactivity, physiological…
Descriptors: Toddlers, Psychopathology, Profiles, Child Development