Fig 3 - available via license: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
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Pupillary responses to background luminance. Note. Characterising the effect of background luminance on absolute pupil size, averaging over all sound valence levels. The time 0 s indicates the start of the fixation phase at which background luminance was adjusted according to the respective condition. The vertical dashed line at 1 s indicates sound onset. As expected, there are large differences in pupil size at each luminance level. (Coloured shades around the pupil trace, although very narrow, represent 95% CI.) (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
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...