Title

The Onset of Puberty: Effects on the Psychophysiology of Defensive and Appetitive Motivation

Document Type

Article

Publication Date

1-15-2009

Publication Title

Development and Psychopathology

Volume

21

Issue

1

First page number:

27

Last page number:

45

Abstract

We examined puberty-specific effects on affect-related behavior and on the psychophysiology of defensive and appetitive motivation while controlling for age. Adolescents (N = 94, ages = 12 and 13 years) viewed 75 pictures (International Affective Picture System: pleasant, neutral, and aversive) while listening to auditory probes. Startle response and postauricular (PA) reflex were collected as measures of defensive and appetitive motivation, respectively. Pubertal status and measures of anxiety/stress reaction and sensation/thrill seeking were obtained. Mid-/late pubertal adolescents showed enhanced startle amplitude across all picture valences. A Puberty × Valence interaction revealed that mid-/late pubertal adolescents showed appetitive potentiation of the PA, whereas pre-/early pubertal adolescents showed no modulation of the PA reflex. Mid-/late pubertal adolescents also scored significantly higher on measures of sensation/thrill seeking than did their pre-/early pubertal peers and puberty moderated the association between psychophysiology and behavioral measures, suggesting that it plays a role in reorganizing defensive and appetitive motivational systems.

Keywords

Puberty effects; Affect-related behavior; Psychophysiology; Adolescents; International affective picture system; Startle response; Postauricular reflex; Motivational systems

Disciplines

Medicine and Health Sciences | Psychiatry and Psychology | Psychological Phenomena and Processes

Language

English

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