Journal
BIOLOGICAL PSYCHOLOGY
Volume 89, Issue 2, Pages 349-364Publisher
ELSEVIER
DOI: 10.1016/j.biopsycho.2011.11.009
Keywords
Heart rate variability; Respiratory sinus arrhythmia; Heart rate; Respiration; Autonomic nervous system
Funding
- Eunice Kennedy Shriver National Institute of Child Health & Human Development [R01HD053570]
- National Institute of Mental Health [T32 MH067631, T32 MH18882]
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Three frequently used RSA metrics are investigated to document violations of assumptions for parametric analyses, moderation by respiration, influences of nonstationarity, and sensitivity to vagal blockade. Although all metrics are highly correlated, new findings illustrate that the metrics are noticeably different on the above dimensions. Only one method conforms to the assumptions for parametric analyses, is not moderated by respiration, is not influenced by nonstationarity, and reliably generates stronger effect sizes. Moreover, this method is also the most sensitive to vagal blockade. Specific features of this method may provide insights into improving the statistical characteristics of other commonly used RSA metrics. These data provide the evidence to question, based on statistical grounds, published reports using particular metrics of RSA. (C) 2011 Elsevier B.V. All rights reserved.
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