抄録
Recently, Kendrick reported a small population of cells in the temporal cortex of sheep that respond preferentially to visual images of animals and humans. In this study, the durations of visual attention to the photographic images and movies were measured as the period during which presented images were recorded on video tapes filmed through a small video camera on the head of cattle. The results in this study were quite similar to Kendrick's electrophysiological studies. Animals responded specially to familiar animals and humans, especially to approaching persons. In this study, however, frontal facial images with horns and photographs of a dog did not evoke increased responsiveness. These results suggest that the learning is most important in cognition. Measuring the duration of visual attention is quite effective to investi- gate cognition patterns of animals, which is an easy methodology.
