Abstract
When two identical objects on a screen move toward each other, coincide at the center of the screen, and then continue to move along their original trajectories to the opposite starting points, observers perceive these visual stimuli as showing one of the two possible scenarios: streaming through or bouncing off each other (stream/bounce perception). Previous research has shown that when a high-arousal face is presented along with the two moving objects, the bouncing percept was predominant, as compared with when a middle- or low-arousal face is presented. In this study, however, such a modulatory effect of the emotional face was eliminated when participants did not judge stream or bounce and the terms “bouncing/streaming” were not used in the experiments. These results suggest that the modulatory effect of emotional stimuli on the stream/bounce judgment cannot be explained solely by the emotional processing per se but, rather, can be modulated by language-based processing.
Highlights
When two identical objects on a screen move toward each other, coincide at the center of the screen, and continue to move along their original trajectories to the opposite starting points, observers perceive these visual stimuli as showing one of the two possible scenarios: streaming through or bouncing off each other
It is noteworthy that the bouncing response was overall predominant under all conditions, compared with the typical stream/bounce situations (e.g., Grassi & Casco, 2012; Watanabe & Shimojo, 1998, 2001), which includes 10% to 20% reports of bouncing
This study aimed to investigate how language processing contributes to the stream/bounce judgment
Summary
When two identical objects on a screen move toward each other, coincide at the center of the screen, and continue to move along their original trajectories to the opposite starting points, observers perceive these visual stimuli as showing one of the two possible scenarios: streaming through or bouncing off each other (stream/bounce perception). When two identical objects on a screen move toward each other, coincide at the center of the screen, and continue to move along their original trajectories to the starting positions of the other object, observers perceive these visual stimuli as one of the two situations: (a) streaming through or (b) bouncing off each other (stream/bounce perception, Metzger, 1934) Focusing on this stream/bounce bistable perception, previous research has investigated how the visual system establishes perceptual representations for ambiguous motion. When a high-arousal emoticon (e.g., ‘(L)’) was added to the motion display, participants predominantly reported the bouncing percepts for two moving objects compared with when a middle- (e.g., ‘(‘x’)’) or low-arousal (e.g., ‘(_-_)’) emoticon was added Their results suggest that higher order emotional processing influences the bistable perception of two interactive objects
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