Pupillary responses as a function of luminance and sound. Note. Baseline-corrected pupil dilations as a function of background luminance and sound valence. The analysis showed that there was no significance for the interactive effect on pupil dilations. (Coloured shades around the pupil trace, although very narrow, represent 95% CI. The vertical grey shaded area represents a baseline period.)

Pupillary responses as a function of luminance and sound. Note. Baseline-corrected pupil dilations as a function of background luminance and sound valence. The analysis showed that there was no significance for the interactive effect on pupil dilations. (Coloured shades around the pupil trace, although very narrow, represent 95% CI. The vertical grey shaded area represents a baseline period.)

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The present study investigated the effect of background luminance on the self-reported valence ratings of auditory stimuli, as suggested by some earlier work. A secondary aim was to better characterise the effect of auditory valence on pupillary responses, on which the literature is inconsistent. Participants were randomly presented with sounds of...