Studiebog
Preservation of Two Infant Temperaments into Adolescence
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Format:
Bog, paperback
Udgivelsesdato:
30-10-2007
Sprog:
Engelsk
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Temperament has been a central element of the on-going effort to describe the distinctiveness of persons at every stage of development. Many researchers have examined the relations of temperament to emotions, behavior, and adjustment generally. Fewer studies have focused primarily on the nature and structure of temperament, however, and even fewer have examined the developmental course of temperament. This Monograph reports a significant exception. The authors undertook theoretically relevant behavioral, biological, and self-report assessments of a sample of 14-to-17 year olds who had been classified into one of four temperamental groups at 4 months of age. Infant temperamental categories were based on observed behavior to a battery of unfamiliar stimuli. The infants classified as high reactive (20 percent of the sample) displayed vigorous motor activity and frequent crying. Those classified as low reactive (40 percent) displayed minimal motor activity and crying. About 25 percent of the infants, called distressed, showed minimal motor activity but cried frequently, and 10 percent, characterized by vigorous motoricity but little crying, were called aroused.Previous evaluations of these children at 14 and 21 months, and 4, 7, and 11 years had revealed that those children initially classified as high reactive were most likely to be avoidant of unfamiliar events at the early ages and emotionally subdued, cautious, and wary of new situations at the later ages. By contrast, initially low-reactive children had been the least avoidant of unfamiliarity in the second year and most emotionally spontaneous and sociable at the later ages. At age 11 years, assessments also had revealed that initially high-reactive children were more likely than the low-reactive participants to display right hemisphere activation in the EEG, a larger evoked potential from the inferior colliculus, larger event related waveforms to discrepant scenes, and greater sympathetic tone in the cardiovascular system.In the follow-up of these individuals reported here, adolescents (14-17 years of age) who had been classified as high reactive in infancy were more likely than initially low reactive participants to display sympathetic tone in the cardiovascular system, to combine a fast latency with a large magnitude of the evoked potential from the inferior colliculus, and to show shallower habituation of the event-related potential to discrepant visual events. Moreover, compared to their low-reactive agemates, initially high reactive adolescents more often reported being subdued in unfamiliar situations, experiencing a dour mood and anxiety over the future, and being religious. An important finding is that behavior and biology were more clearly dissociated in adolescence than at earlier ages. However, infant temperamental category at 4 months remained a powerful predictor of behavior in adolescence, suggesting that the features that characterize the two temperamental biases by initially high- and low-reactive are not completely malleable to the profound effects of brain growth and experience.

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Udgivelsesdato:
30-10-2007
ISBN13:
9781405180115
Vægt:
156 g
Dybde:
6 mm
Bredde:
169 mm
Højde:
230 mm
Format:
Paperback
Bibliotekernes beskrivelse Temperament has been a central element of the on-going effort to describe the distinctiveness of persons at every stage of development. Many researchers have examined the relations of temperament to emotions, behavior, and adjustment generally.

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