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Trials effects in the evoked cardiac response under processing load


, : Trials effects in the evoked cardiac response under processing load. Physiological Psychology 12(4): 315-318

Recent studies of the phasic evoked cardiac response in the OR [orienting response] context have identified the deceleratory heart rate component with primary bradycardia. Cardiac deceleration thus appears to reflect stimulus registration, a preliminary process in OR elicitation. Situational factors may lead to an additional acceleratory component, probably reflecting cognitive processing demand. Trials effects in these 2 components of a complex cardiac response, reflecting both stimulus and situational factors, were investigated in humans. The deceleratory component failed to show a simple trials effect, a finding compatible with the concept of stimulus registration. The acceleratory component increased over trials, compatible with its hypothesized reflection of cognitive processing.

Accession: 006840602

DOI: 10.3758/BF03327206

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Related references

Barry R.J., 1984: The evoked cardiac response under processing load. Previous work has suggested that HR [heart rate] deceleration, commonly obtained in OR [orienting response] studies, reflected a preliminary process of stimulus registration rather than the OR itself. Research by the Laceys indicated that such a p...

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