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Studying how people evaluate option characteristics in the option assessment stage would provide important knowledge on human decision making. Using the event\u2010related potential (ERP) method, the present study investigated the neural mechanism of evaluating two types of option characteristics (i.e., reward magnitude and degree of uncertainty) in the temporal dimension. Thirty\u2010five volunteers participated in a monetary gambling task, where they either accepted or rejected gambles. The ERP results showed a double dissociation pattern, with the early P1 component being sensitive to magnitude but insensitive to degree of uncertainty, while both the N2 and P3 components showed the opposite pattern. The results suggest that these two fundamental option features are assessed rapidly and separately in the human brain. Specifically, small magnitude elicited a larger P1 than did large magnitude, indicating that the perceptual and attentional processing of options is modulated by magnitude. Both the N2 and P3 amplitudes evoked by the risky context were larger than those evoked by the ambiguous one, reflecting that more cognitive conflicts and resources are involved in the former condition. Furthermore, the P1, but not the N2 or P3, amplitude was sensitive to decisions, suggesting that early attentional processes may contribute to human decision making. These findings may provide insight into the temporal mechanisms of option characteristic processing.<\/jats:p>","DOI":"10.1111\/psyp.13403","type":"journal-article","created":{"date-parts":[[2019,5,28]],"date-time":"2019-05-28T00:59:41Z","timestamp":1559005181000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Electrophysiological indexes of option characteristic processing"],"prefix":"10.1111","volume":"56","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8825-2760","authenticated-orcid":false,"given":"Yongling","family":"Lin","sequence":"first","affiliation":[{"name":"Center for Brain Disorder and Cognitive Science Shenzhen University Shenzhen China"},{"name":"Shenzhen Key Laboratory of Affective and Social Cognitive Science Shenzhen University Shenzhen China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lian","family":"Duan","sequence":"additional","affiliation":[{"name":"Center for Brain 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