Why the study?
Limited research has investigated the relationships between pupil size and other well-known autonomic responses as indicators of autonomic arousal.
Comparison
Incongruent vs congruent conditions and positive vs negative valence during an emotional face-word Stroop task
Key result
During an emotional face-word Stroop task, larger pupil dilations correlated with higher heart rates, skin conductance, and respiration amplitudes on a trial-by-trial basis.
Authors
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Supports pupillometry for real-time autonomic monitoring in affective research; leaves open clinical translation.
Observational
Pupil size dynamics correlate with other autonomic responses on a trial-by-trial basis, highlighting it as an effective real-time index for autonomic arousal during emotional processing.
Chang et al. (2024) conducted an observational in Autonomic arousal during emotional conflict. Emotional face-word Stroop task (incongruent condition) vs. Congruent condition was evaluated on Correlation between pupil size and autonomic responses (heart rate, skin conductance, pulse wave amplitude, respiration). During an emotional face-word Stroop task, larger pupil dilations correlated with higher heart rates, skin conductance, and respiration amplitudes on a trial-by-trial basis.