Document Detail

Environmental control, social context, and individual differences in behavioral and cortisol responses to novelty in infant rhesus monkeys.
MedLine Citation:
PMID:  16460529     Owner:  NLM     Status:  MEDLINE    
The effects of appetitive controllability on behavioral and cortisol reactivity to novelty in 12 infant rhesus monkeys were studied. Surrogate-peer-reared infants had homecage access to food treats contingently via lever pressing ("master") or noncontingently ("yoked") for 12 weeks from postnatal month 2. Masters lever-pressed more, but did not differ in baseline cortisol. At month 5, infants were exposed to a novel environment in social groups and individually. Masters were significantly more active and exhibited significantly lower cortisol reactivity to the novel environment, but only in the individual context. Also, individual differences in operant behavior were positively correlated with behavioral activity and negatively correlated with cortisol reactivity to the novel environment. The results reveal context-specific benefits of contingent stimulation in infancy.
Peter G Roma; Maribeth Champoux; Stephen J Suomi
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Intramural    
Journal Detail:
Title:  Child development     Volume:  77     ISSN:  0009-3920     ISO Abbreviation:  Child Dev     Publication Date:    2006 Jan-Feb
Date Detail:
Created Date:  2006-02-07     Completed Date:  2006-07-18     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0372725     Medline TA:  Child Dev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  118-31     Citation Subset:  IM    
National Institute of Child Health and Human Development, USA.
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MeSH Terms
Age Factors
Animals, Newborn / psychology*
Appetitive Behavior / physiology*
Arousal / physiology*
Hydrocortisone / blood*
Hypothalamo-Hypophyseal System / physiology
Internal-External Control*
Macaca mulatta / psychology*
Maternal Deprivation
Pituitary-Adrenal System / physiology
Social Behavior*
Social Environment*
Statistics as Topic
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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