Morphometric approach to congruent facial expressions in face-to-face interactions

タイメン バメン ニオケル ヒョウジョウ ノ ドウチョウテキ ヒョウシュツ ニカンスル ケイタイ ソクテイガクテキ ケントウ

コモリ, マサシ

Komori, Masashi

福井, 正昇

フクイ, マサノリ

Fukui, Masanori

長岡, 千賀

ナガオカ, チカ

Nagaoka, Chika

オオサカ ダイガク ダイガクイン ニンゲン カガク ケンキュウカ タイジン シャカイ シンリガク ケンキュウシツ

英語

モーションキャプチャ

幾何学的形態測定学

congruent facial expression

motion capture

geometric morphometrics

Congruence of facial expressions in face-to-face interactions was quantitatively investigated. Three-dimensional facial sequences of 13 participating dyads performing a shiritori (cap verses) task under face-to-face and non-face-to-face conditions were recorded using a stereo-camera system. Prior to each recording, the positions of 22 landmarks were specified on each face. Three-dimensional coordinates of the landmarks were obtained for each participant and for each frame, through landmark tracking and triangulation. Then, based on the landmarks, generalized Procrustes analysis (GPA) was performed separately for each dyad. Using GPA, changes in each facial expression at each moment was represented as a multi-dimensional vector. Similarity of facial expressions between the two members of each dyad in each condition, which was representative of the degree of facial congruence in each dyad, was calculated based on cosine similarities of the vectors. The results indicated that the mean similarity of facial expressions was higher in the face to face, in comparison to the non- face-to-face condition.

福井, 正昇

長岡, 千賀

英語