Key Points
We represent observers' gaze distributions during impression evaluation as conditional probabilities for individual body parts. We investigate how the impression word being evaluated and the body part affect the distribution of attention.

Abstract
When we form an impression of someone in a photograph, which parts of the body do we look at? We ask observers to assess how well a word describing an impression applies to a pictured person, and record their gaze during the task. Our aim is not only to locate their gaze, but also to describe it numerically so that different viewing patterns can be compared.
We represent the measured gaze positions using probabilities, organized according to the body part being considered. This is a conditional probability: a probability described under a specified condition. The representation lets us compare how gaze patterns differ when the impression word or the body part changes.
In the experiments, changing either the impression word or the body part produced larger differences between the probability distributions of gaze. The results indicate that people do not look at every body part in the same way when judging impressions; their viewing patterns depend on what they are evaluating.
Publications
- 木下 顕, 井上 路子, 西山 正志, 岩井 儀雄,
身体への印象単語を判別する際に計測された視線位置分布の確率表現,
精密工学会誌, vol. 86, no. 12, pp. 989 - 996, December 2020. - Ken Kinoshita, Michiko Inoue, Masashi Nishiyama, Yoshio Iwai,
Body-part Attention Probability for Measuring Gaze During Impression Word Evaluation, Proceedings of 23rd International Conference on Human-Computer Interaction (HCII), CCIS 1420, pp. 105 - 112, July 2021. [Short movie]