Respiratory sinus arrhythmia and ambient temperature at 5 months
Infants were tested in a clinical environment that did not control ambient temperature and assigned, post-hoc, into < 80°F and > 80°F groups. Respiratory sinus arrhythmia was suppressed in response to the elevated temperature. The findings suggest that temperature should be controlled during psychophysiological research with infants.
Riniolo, T. C., Bazhenova, O. V., & Porges, S. (1997). Respiratory sinus arrhythmia and ambient temperature at 5 months. Infant Behavior & Development, 20(3), 417-420. DOI: 10.1016/S0163-6383(97)90012-6