ERIC Number: EJ940062
Record Type: Journal
Publication Date: 2007-Mar
Abstractor: As Provided
Reference Count: 0
Heart Rate Reactivity during Contingency Learning in 5- to 10-Month-Old at-Risk and Non-Risk Babies
Millar, W. S.; Weir, C. G.
British Journal of Developmental Psychology, v25 n1 p135-146 Mar 2007
The study investigated the dynamic relation between contingency learning and heart rate with risk and non-risk babies 5- to 10-months-old. Four groups were compared in a two contingency treatments (contingent, yoked) x two risk status design. Concurrent heart rate was monitored during three phases of a contingency learning task (baseline, contingency/stimulation, extinction) and analysis focused on phase transitions. Non-risk babies presented with contingent stimulation showed an immediate increase in cardiac rate associated with a subsequent response increase to the contingency. Risk infants presented with contingent stimulation showed delayed cardiac reactivity accompanied by a smaller response increase to the contingency. Yoked controls decreased responding in the contingent period with no significant changes in cardiac reactivity at phase transitions. The findings of the study are discussed in relation to individual differences in physiological regulation and to differential sensitization in a contingency learning task.
Descriptors: Metabolism, Stimulation, Infants, Physiology, At Risk Persons, Comparative Analysis, Measurement, Control Groups, Individual Differences, Learning Processes, Task Analysis
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A