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Pupillary responses reflect image memorability
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This study examined whether pupil size changes as a function of the memorability of natural scene images. In Experiment 1, the participants memorized, recognized, and passively viewed high- and low-memorability images adopted from an existing dataset. Baseline-corrected pupil sizes were larger for high-memorability images only in old trials during the recognition phase. However, after stricter control of image luminance and arousal, pupil dilation for high-memorability images was observed in all memorization, recognition, and passive view phases (Experiments 2 and 3). This effect of image memorability was further validated through item-based analyses. The pupil old/new effect and the subsequent memory effect on the pupil were replicated. The results of this research suggest that pupils are sensitive to image memorability, independent of the behavioral task required.
Title: Pupillary responses reflect image memorability
Description:
This study examined whether pupil size changes as a function of the memorability of natural scene images.
In Experiment 1, the participants memorized, recognized, and passively viewed high- and low-memorability images adopted from an existing dataset.
Baseline-corrected pupil sizes were larger for high-memorability images only in old trials during the recognition phase.
However, after stricter control of image luminance and arousal, pupil dilation for high-memorability images was observed in all memorization, recognition, and passive view phases (Experiments 2 and 3).
This effect of image memorability was further validated through item-based analyses.
The pupil old/new effect and the subsequent memory effect on the pupil were replicated.
The results of this research suggest that pupils are sensitive to image memorability, independent of the behavioral task required.
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