A method for measuring dynamic respiratory sinus arrhythmia (RSA) in infants and mothers

The measurement of respiratory sinus arrythmia (RSA) in infants, children and adults is critical to the study physiological regulation, more recently, interpersonal covariation, but it has been impeded by methods that limit its resolution 30 s or longer. Recent analytical developments have suggested for studying dynamic RSA adults, we extended this work infants mothers. In current paper, describe a new strategy estimating time series adults. Our method provides means synchrony infant-mother dyads offers some important advantages relative existing use inter-beat-intervals (e.g. Feldman, Magori-Cohen, Galili, Singer, & Louzoun, 2011). middle sections offer brief tutorial on calculating continuously with sliding window review empirical evidence determining optimal size. order confirm reliability our results, briefly discuss testing randomly shuffling control spurious correlations, also using bootstrapping technique confidence intervals cross-correlation function. One implication emerges from applying possible measure both positive negative these categorical measures are differentially predictive future outcomes.