Preservation of Two Infant Temperaments into Adolescence by Nathan A. Fox
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Preservation of Two Infant Temperaments into Adolescence
By Nathan A. Fox

Preservation of Two Infant Temperaments into Adolescence

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Preservation of Two Infant Temperaments into Adolescence by Nathan A. Fox

Book Description

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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Book Details

ISBN: 9781405180115
ISBN-10: 1405180110
Format: Paperback
(230mm x 169mm x 6mm)
Pages: 132
Imprint: John Wiley & Sons Ltd
Publisher: John Wiley and Sons Ltd
Publish Date: 30-Oct-2007
Country of Publication: United Kingdom

Books By Author Nathan A. Fox

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Bringing together some of the leading thinkers on the development of positive affect, this book aims to create a different focus for affective neuroscience. The contributors present their research on the development of positive affect in child, nonhuman, and clinical population.

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Author Biography - Nathan A. Fox

Nathan A. Fox is Professor of Human Development at the University of Maryland College Park. His area of research interest is in social and emotional development of infants and young children. He has developed methods for assessing brain activity in infants and young children during tasks designed to elicit a range of emotions. His work is funded by the National Institutes of Health and includes a MERIT award. He currently serves on the Biobehavioral Sciences standing review panel for NICHD. Dr. Fox was awarded the Distinguished Scholar Teacher award from the University of Maryland in 2005. Laurence Steinberg (Ph.D., 1977, Cornell University) is the Distinguished University Professor and Laura H. Carnell Professor of Psychology at Temple University. His research focuses on biological and contextual influences on normative and atypical development during adolescence, most recently, on the connections between brain maturation and adolescent risk-taking. Jerome Kagan (Ph.D., Yale University) is professor of psychology emeritus at Harvard University, Cambridge, Massachusetts. He is the author of Galen's Prophecy (1984), Three Seductive Ideas (2002), An Argument for Mind (2006), and with Nancy Snidman of The Long Shadow of Temperament (2004). His interests include infant temperament, cognitive development and emotional processes. Nancy Snidman (Ph.D., University of California, Los Angeles) is the EEG Research Director of TRANSCEND (Treatment, Research And Neuro- SCience Evaluation of Neurodevelopmental Disorders) at Massachusetts General Hospital. She is author with Jerome Kagan of The Long Shadow of Temperament (2004). Her interests include biological correlates of temperament and individual differences, autism and cognitive development. Sara Towsley received her B.A. from Tufts University (2005) in clinical psychology and her M.A. in psychology from Brandeis University (2007). She is currently a research associate in the psychology department at Brandeis University. Vali Kahn received her B.A. from Bryn Mawr (1998) in psychology. She is currently a graduate student in clinical psychology at University of Massachusetts at Boston.

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