TY - JOUR
T1 - The Posture of Putting One’s Palms Together Modulates Visual Motion Event Perception
AU - Saito, Godai
AU - Gyoba, Jiro
N1 - Funding Information:
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was supported by a Grant-in-Aid for JSPS Research Fellow (No. 17J06218).
Publisher Copyright:
© The Author(s) 2017.
PY - 2018/2/1
Y1 - 2018/2/1
N2 - We investigated the effect of an observer’s hand postures on visual motion perception using the stream/bounce display. When two identical visual objects move across collinear horizontal trajectories toward each other in a two-dimensional display, observers perceive them as either streaming or bouncing. In our previous study, we found that when observers put their palms together just below the coincidence point of the two objects, the percentage of bouncing responses increased, mainly depending on the proprioceptive information from their own hands. However, it remains unclear if the tactile or haptic (force) information produced by the postures mostly influences the stream/bounce perception. We solved this problem by changing the tactile and haptic information on the palms of the hands. Experiment 1 showed that the promotion of bouncing perception was observed only when the posture of directly putting one’s palms together was used, while there was no effect when a brick was sandwiched between the participant’s palms. Experiment 2 demonstrated that the strength of force used when putting the palms together had no effect on increasing bounce perception. Our findings indicate that the hands-induced bounce effect derives from the tactile information produced by the direct contact between both palms.
AB - We investigated the effect of an observer’s hand postures on visual motion perception using the stream/bounce display. When two identical visual objects move across collinear horizontal trajectories toward each other in a two-dimensional display, observers perceive them as either streaming or bouncing. In our previous study, we found that when observers put their palms together just below the coincidence point of the two objects, the percentage of bouncing responses increased, mainly depending on the proprioceptive information from their own hands. However, it remains unclear if the tactile or haptic (force) information produced by the postures mostly influences the stream/bounce perception. We solved this problem by changing the tactile and haptic information on the palms of the hands. Experiment 1 showed that the promotion of bouncing perception was observed only when the posture of directly putting one’s palms together was used, while there was no effect when a brick was sandwiched between the participant’s palms. Experiment 2 demonstrated that the strength of force used when putting the palms together had no effect on increasing bounce perception. Our findings indicate that the hands-induced bounce effect derives from the tactile information produced by the direct contact between both palms.
KW - force
KW - multisensory
KW - proprioception
KW - stream/bounce perception
KW - touch
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U2 - 10.1177/0301006617745783
DO - 10.1177/0301006617745783
M3 - Article
C2 - 29207910
AN - SCOPUS:85040738496
VL - 47
SP - 225
EP - 231
JO - Perception
JF - Perception
SN - 0301-0066
IS - 2
ER -