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Cairns, Robert B.; Cairns, Beverly D. – 1989
Changes from the expected life course can arise from at least three different reasons in longitudinal work: developmental novelty, errors in diagnosis, and errors in expectation. This longitudinal study examined the social development of 220 fourth graders and 475 seventh graders over a period of 10 years with over 98 percent of the original…
Descriptors: Adolescents, Aggression, Behavior Change, Behavior Development
