乾杯動作における眼・手腕協調過程

<p>本研究では，乾杯動作における眼・手腕協調過程と自閉傾向（AQスコア）との関連を検討した．対人なし条件，対人あり・アイコンタクトなし条件，対人あり・アイコンタクトあり条件を設定し，対人なし条件では固定グラスに対して，対人ありの2条件ではパートナーが把持した固定グラスに対して乾杯動作の視線・手腕動作計測を行った．またアイコンタクトあり条件では，乾杯の際にパートナーとアイコンタクトをするように教示した．その結果，対人なし条件において，AQスコアが高い参加者ほど手首の最大速度が有意に小さかったが，対人ありのいずれの条件でもそのような傾向は認められなかった．このことから対人の有無による速度調整が自閉傾向により影響を受けることが示唆された．</p><p>The present study investigates whether and how autistic traits (i.e., autism-spectrum quotient score; AQ score) modulate eye-hand coordination when doing a toast, which is a social coordinated action. Each participant was required to hold a wooden wineglass and make a toast with a presented wooden wineglass which was located 35 cm away from the edge of the table in the participant’s sagittal plane. Three conditions were tested: (i) glass-without-person condition where only the glass was presented, (ii) partner-and-no-eye-contact condition where the glass was held by a partner and eye contact was not necessary when doing a toast, and (iii) partner-and-eye-contact condition where the glass was held by a partner and eye contact was required. We found that wrist peak velocity was significantly and negatively correlated with AQ score in the first condition while no correlation between wrist peak velocity and AQ score in the second and third conditions. </p>