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Contingent Negative Variation and Cardiac Deceleration in a Long Preparatory Interval: A Developmental Study
Author(s) -
Klorman Rafael
Publication year - 1975
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.1975.tb00057.x
Subject(s) - habituation , psychology , heart rate , basal (medicine) , developmental psychology , contingent negative variation , audiology , electroencephalography , neuroscience , medicine , blood pressure , insulin
Ten‐, 14‐, and 19‐yr‐olds participated in a simple RT task with 5‐sec foreperiod. CNV waveforms contained an early and a late negative component, and comparable deceleratory limbs characterized the cardiac waveforms. The 19‐yr‐oldsapos; early cardiac deceleration underwent intersession habituation and the analogous CNV response intra‐session diminution; both processes were absent in younger subjects. Only young adults exhibited steady growth of late cardiac and CNV waves across both sessions. There were no developmental differences in basal body movement or anticipatory slowing of somatic activity or cardiac rate. However, 10‐yr‐olds had faster basal heart rates and larger acceleratory cardiac responses within the foreperiod than either older group. The results demonstrated partial dissociation of somatic and cardiac activity under the present experimental conditions. The overall results underscore the need for developmental psychophysiological research including childhood and adolescence.