Abstract
The purpose of this study was to differentiate the heart rate changes during the anticipatory period of shock to come into some time-sequential patterns by the method of principal component analysis, and to identify these time-sequential factors to the emotional states which induced by the experimental conditions varied in predictability, controllability and selectability. The correlation matrix among Z-scores of heart rate in 260 subjects showed a simplex structure, and three time-sequential factors obtained by O-technique were arranged in the law of continuation and order observed in a set of behavioral and physiological changes coordinated in time. Therefore, the manifestation of experimentally induced emotional states could be considered as combinations of the unitary factor dimension which seemed to be a particular response pattern over time. The results were satisfactory enough to conclude the heart rate changes during the anticipatory period to be a physiological manifestation with particular mixtures of unitary emotional state.
