反馈负波(feedback related negativity, FRN)是由代表行为错误或失去金钱等负性反馈刺激诱发的一种脑电波成分,出现在刺激呈现后250~300ms左右,偶极子源定位发现这一成分产生于前扣带回附近。对于FRN的功能意义的解释主要有强化学习理论和情绪动机假说,前者认为FRN反映的是神经系统对反馈刺激的认知加工过程,而后者认为FRN反映的是对情绪动机意义的评价过程。两种理论框架下还有一些目前研究仍待解决的问题,可能是未来研究的方向 相似文献
Although it is well known that women have relatively high rates of attrition from STEM occupations in the United States, there is limited empirical research on the views and experiences of female STEM degree-earners that may underlie their commitment to their chosen fields. Utilizing survey data from 229 women completing STEM degrees at two U.S. universities, the present study examines how perceptions of occupational affordances and interactions with others in the field predict their occupational STEM commitment. Additionally, the study employs an intersectional lens to consider whether the patterns of association are different for Asian women and White women. Multivariate regression analyses reveal that although communal goal affordances do not significantly predict women’s occupational STEM commitment, agentic goal affordances are a strong predictor of such commitment. Regarding experiences with others in the field, results reveal that classmate interactions are not associated with STEM commitment, whereas positive faculty interactions do significantly predict such commitment. However, further analyses reveal racial differences in these patterns because agentic goal affordances are much weaker predictors of occupational STEM commitment for Asian women than for White women, and results indicate that faculty interactions are significant predictors of STEM commitment only for White women. Thus, our results strongly suggest that the theoretical models of motivation and support that underlie much of the discussion around women in STEM do not similarly apply to women from all racial backgrounds and that more research is needed that considers how both gender and race simultaneously shape STEM engagement and persistence.