Presentation Schedule
Emotional Processing Stabilizes when Stimulus Presentation Aligns with Natural Cardiac Phase Ratios (101677)
Tuesday, 24 March 2026 16:00
Session: Poster Session 3
Room: Orion Hall (5F)
Presentation Type: Poster Presentation
Previous research has reported that interoceptive signals synchronized with the cardiac cycle influence emotional processing. These studies typically present emotional stimuli in equal proportions during systole and diastole (1:1), yet this approach may lack ecological validity. To address this, we compared emotional responses under two timing conditions: conventional equal ratio (1:1) versus a more naturalistic ratio (3:7, systole:diastole). Participants rated fearful and neutral faces presented during each cardiac phase. Consistent with prior findings, fearful faces elicited higher intensity ratings during systole under both conditions. Importantly, variability in ratings (i.e., standard deviation of ratings) was lower in the partial-ratio condition during systole, and less variable in systole than diastole. These results suggest that emotional evaluation is modulated not only by interoceptive signals but also by their context, that is, the presentation ratio aligned to natural cardiac cycles. This novel perspective underscores the need to consider the timing context of interoceptive signals when examining emotional and cognitive processes.
Authors:
Tsukasa Kimura, The University of Osaka, Japan
About the Presenter(s)
Dr. Tsukasa Kimura is a Lecturer in Graduate School of Human Sciences, The University of Osaka, JAPAN.
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