End in view: Joint end-state comfort depends on gaze and extraversion |
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| Affiliation: | 1. Cognitive Neuroscience of Perception and Action, Faculty of Psychology, Philipps University Marburg, Marburg, Germany;2. Neuromotor Behavior Laboratory, Department of Psychology and Sport Science, Justus-Liebig-University Giessen, Giessen, Germany;3. Department of Psychology and Sports Sciences, Goethe-University Frankfurt/Main, Germany;1. Escola de Educação Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil;2. Dept. Physical Therapy, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel;3. Faculty of Health and Medical Sciences, University of Copenhagen, Denmark;4. Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel;1. School of Biological and Health Systems Engineering, Arizona State University, United States of America;2. Division of Biokinesiology and Physical Therapy, Herman Ostrow School of Dentistry, and Department of Neurology, Keck School of Medicine, University of Southern California, United States of America;1. Department of Physical Therapy, Takasaki University of Health and Welfare, Gunma 501 Nakaorui-machi, Takasaki 370-0033, Japan;2. Tsutsumi Orthopaedic Clinic, Akita 3-8-24 Terauchidonosawa, Akita 011-0901, Japan;3. Department of Rehabilitation, Iwamuro Rehabilitation Hospital, Niigata 772-1 Iwamuronsen, Nishikan-ku, Niigata 953-0104, Japan;4. Department of Rehabilitation, Tsunoda Hospital, Gunma 675-4 Kamishinden, Tamamura-machi, Sawagun 370-1133, Japan;5. Department of Rehabilitation, Hanna Sawarabi Ryoikuen, Gunma 28-30 Harunasan-machi, Takasaki 370-3341, Japan;6. Department of Rehabilitation, Sannocho Hospital, Niigata 5-2-30 Hon-cho, Sanjo 955-0071, Japan;7. Suzuki Otolaryngology Clinic, Niigata 6-5-37 Meike, Chuo-ku, Niigata 950-0941, Japan;8. Department of Rehabilitation, Takeda General Hospital, Fukushima 3-27 Yamaga-machi, Aizuwakamatsu 965-8585, Japan;9. Department of Physical Therapy, Niigata University of Health and Welfare, Niigata 1398 Shimami-cho, Kita-ku, Niigata 950-3198, Japan;10. Department of Welfare for the Elderly, Shibata City, Niigata 3-3-3 Chuo-cho, Shibata 957-8686, Japan;11. Iwakura Community General Support Center, Kyoto 1255 Iwakuranagatani-cho, Sakyo-ku, Kyoto 606-0026, Japan |
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| Abstract: | This study investigated how humans adapt to a partner's movement in a joint pick-and-place task and examined the role of gaze behavior and personality traits in adapting to a partner. Two participants sitting side-by-side transported a cup from one end of a table to the other. The participant sitting on the left (the agent) moved the cup to an intermediate position from where the participant sitting on the right (the partner) transported it to a goal position with varying orientations. Hand, finger, cup movements and gaze behavior were recorded synchronously via motion tracking and portable eye tracking devices. Results showed interindividual differences in the extent of the agents' motor adaptation to the joint action goal, which were accompanied by differences in gaze patterns. The longer agents directed their gaze to a cue indicating the goal orientation, the more they adapted the rotation of the cup's handle when placing it at the intermediate position. Personality trait assessment showed that higher extraverted tendencies to strive for social potency went along with more adaptation to the joint goal. These results indicate that agents who consider their partner's end-state comfort use their gaze to gather more information about the joint action goal compared to agents who do not. Moreover, the disposition to enjoy leadership and make decisions in interpersonal situations seems to play a role in determining who adapts to a partner's task in joint action. |
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