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The VA presents a situation of risky decision\u2010making, which typically implements value processing and a loss aversion mechanism. Neural outcome processing of VA bids are not known; this study explores this for the first time using EEG. Twenty\u2010eight healthy participants bid on household items against an anonymous, computerized opponent. Bid outcome event\u2010related potentials were predicted to differentiate between three conditions: outbid (no\u2010win), large margin win (bargain), and small margin win (snatch). Individual loss aversion values were evaluated in a separate behavioral experiment offering gains or losses of variable amounts but equal chances against an assured gain. Processing outcomes of VA bids were associated with a feedback\u2010related negativity (FRN) potential with a spatial maximum at the vertex (251\u2013271\u2009ms), where bargain win trials resulted in greater FRN amplitudes than snatch win trials. Additionally, a P300 potential was sensitive to win versus no\u2010win outcomes and to retail price. Individual loss aversion level did not correlate with the strength of FRN or P300. Results show that outcome processing in a VA is associated with FRN that differentiates between relatively advantageous and less advantageous gains, and a P300 that distinguishes between the more and less expensive auction items. Our findings pave the way to an objective exploration of economic decision\u2010making and purchasing behavior involving a widely popular auction.<\/jats:p>","DOI":"10.1111\/psyp.14125","type":"journal-article","created":{"date-parts":[[2022,6,17]],"date-time":"2022-06-17T05:24:25Z","timestamp":1655443465000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Bid outcome processing in Vickrey auctions: An <scp>ERP<\/scp> study"],"prefix":"10.1111","volume":"59","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3572-1516","authenticated-orcid":false,"given":"Alice","family":"Newton\u2010Fenner","sequence":"first","affiliation":[{"name":"Department of Psychology University of Liverpool  Liverpool UK"},{"name":"Institute of Risk and Uncertainty University of Liverpool  Liverpool 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