【摘 要】
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Dear Editor,rnIt is well-known that pupil size,albeit intrinsically sensi-tive to ambient luminance changes,can be modulated by many cognitive processes,especially those associated with physiological arousal[1].Compatible with this view,when observers are
【机 构】
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State Key Laboratory of Brain and Cognitive Science,CAS Center for Excellence in Brain Science and I
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Dear Editor,rnIt is well-known that pupil size,albeit intrinsically sensi-tive to ambient luminance changes,can be modulated by many cognitive processes,especially those associated with physiological arousal[1].Compatible with this view,when observers are watching or even anticipating reward stimuli that satisfy their needs(e.g.,a monetary reward[2]or smoking-related pictures for smokers[3]),their pupils dilate due to a heightened state of arousal.On the other hand,according to social motivation theory,healthy human individuals are ingrained with social motivation to orient towards biosocial signals,to seek out pleasure in social interactions,and to maintain social affiliations[4].Bioso-cial signals(e.g.,face and biological motion)that drive social motivation,are therefore granted attentional priority[5]and have a rewarding function[6].In line with previous findings that reward-related processing dilates pupils[2,3],our innate preference for biosocial signals can be reflected by pupil size as well[5,7].In essence,such preference for biosocial signals ought to rely on communicative intentions heavily embedded in social interactions.Although social motivation theory proposes that people want and like to engage in social interactions[4],to our knowledge,no study has yet provided empirical evidence that our intrinsic preference for social interaction is simply manifested in pupil size.
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