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Estimating time‐varying RSA to examine psychophysiological linkage of marital dyads
Authors:Kathleen M. Gates  Lisa M. Gatzke‐Kopp  Maria Sandsten  Alysia Y. Blandon
Affiliation:1. Psychology Department, University of North Carolina, Chapel Hill, North Carolina, USA;2. Department of Human Development and Family Studies, The Pennsylvania State University, State College, Pennsylvania, USA;3. Department of Mathematical Statistics, Lund University, Lund, Sweden;4. Psychology Department, The Pennsylvania State University, State College, Pennsylvania, USA
Abstract:One of the primary tenets of polyvagal theory dictates that parasympathetic influence on heart rate, often estimated by respiratory sinus arrhythmia (RSA), shifts rapidly in response to changing environmental demands. The current standard analytic approach of aggregating RSA estimates across time to arrive at one value fails to capture this dynamic property within individuals. By utilizing recent methodological developments that enable precise RSA estimates at smaller time intervals, we demonstrate the utility of computing time‐varying RSA for assessing psychophysiological linkage (or synchrony) in husband‐wife dyads using time‐locked data collected in a naturalistic setting.
Keywords:Respiratory sinus arrhythmia  Time‐varying RSA estimates  RSA linkage  Psychophysiological linkage
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