(英) |
In this study, we investigated the relationship between the observer's subjective impression and the pupillary light reflex using emotion-evoking images. In the experiment, 67 images from an emotion-evoking image database were used to measure changes in pupil diameter when presented for 3 seconds each. In addition, the observer's image impression was rated on a 9-point scale on a two-dimensional scale of pleasant-unpleasant and alertness. The rating tendency for the image was consistent with the image content, but there was a large difference between individuals. Therefore, we applied the item reaction theory to the rating values to normalize the emotional sensitivity of the two-dimensional rating values for each individual. When the change in pupil diameter was compared between the two groups on the pleasant-discomfort scale, the pupil diameter was significantly larger in the image that the observer rated as unpleasant, and there was a significant difference between 0.75 seconds and 3.0 seconds in the time-series change. It was observed. In addition, the normalized pleasant-discomfort rating value was examined for pupil changes by multi-step classification such as group 3 and group 4. In the 3 groups as well, it was confirmed that the pupil diameter was the largest in the unpleasant image group and the smallest in the pleasant image group from 1.1 seconds to 1.5 seconds, and the pupil diameter changed significantly depending on the pleasant-unpleasant rating value. From these results, it was clarified that the change in pupil diameter with respect to emotion depends on the impression of comfort-discomfort, and the order relationship of pupil diameter by the scale value. |