Differences in stress reactivity of laboratory macaques measured by heart period and respiratory sinus arrhythmia (1998)

Bowers, C. L., Crockett, C. M., Bowden, D. M.

Abstract

Exposure to an unfamiliar technician with capture gloves stimulated cardiac reactivity more strongly than an intense sound. ... Behavior responses to the glove indicated that all subjects consistently perceived this 'ecologically relevant' stimulus as threatening.