Vection can be induced without explicit motion signal using backscroll illusion

We demonstrated that vection is induced by a motion stimuli that does not have an explicit, bottom‐up motion component. The stimulus motion used in this experiment was animation movie clips of walking people, with no positional changes within the stimulus field. There were no low‐level motion signals in the direction of gait. The results indicate that strong vection was observed under optimal stimuli conditions, that is, large visual field and multiple walkers. These results suggest that vection can be elicited solely by motion signals extracted at relatively higher levels within the visual system. This is the first report that a pure high‐level motion related to “implied motion” induces vection.     

Collective action and subordinate group identity in a simulated society game

Abstract: This research examined the effects of upward mobility and resource disparity on subordinates’ collective action and group identity in a context of intergroup negotiation by using a simulated society (SIMSOC) game. According to the social identity theory, it was hypothesized that when individual mobility opportunities for a subordinate group increase, the members of the subordinate group are less likely to participate in collective actions and to appreciate the merits of their own group identity. Four hundred and fifty‐four undergraduates participated in 12 separate SIMSOC games. For each game, approximately 40 undergraduates were divided into dominant and subordinate groups. Each of the four combinations of high/low levels of upward mobility and large/small resource disparity was played out three times. Subordinates in the low‐mobility condition acted collectively more frequently and evaluated their own group more positively than those in the high‐mobility condition. A signifificant positive correlation between the frequency of subordinates’ collective action and in‐group favoritism was found.