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Cardiac vagal tone: Stability and relation to difficultness in infants and 3‐year‐Olds
Author(s) -
Porges Stephen W.,
DoussardRoosevelt Jane A.,
Lourdes Portales A.,
Suess Patricia E.
Publication year - 1994
Publication title -
developmental psychobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 93
eISSN - 1098-2302
pISSN - 0012-1630
DOI - 10.1002/dev.420270504
Subject(s) - vagal tone , heart rate , autonomic nervous system , reactivity (psychology) , temperament , psychology , cardiology , tone (literature) , anesthesia , audiology , medicine , blood pressure , personality , social psychology , art , alternative medicine , literature , pathology
Psychophysiological studies of infants have found a relation between behavioral reactivity and indices of autonomic state. The relation between behavioral reactivity, assessed via maternal report, and autonomic state, assessed via cardiac vagal tone in 9‐month‐old infants was examined. Cardiac vagal tone was quantified by measuring the amplitude of respiratory sinus arrhythmia. High cardiac vagal tone was associated with greater behavioral reactivity, resulting in maternal reports of more difficult temperament. Stability of the two measures, cardiac vagal tone and difficult temperament, from 9 months to 3 years of age was demonstrated. In addition, 9‐month cardiac vagtal tone, independent of 9‐months temperament, was related to 3‐year difficultness with higher 9‐month cardiac vagal tone being related to less‐difficult 3‐year behavior. © 1994 John Wiley & Sons, Inc.