{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T00:56:44Z","timestamp":1792112204712,"version":"4.4.0"},"reference-count":31,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2008,1,1]],"date-time":"2008-01-01T00:00:00Z","timestamp":1199145600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Perception"],"published-print":{"date-parts":[[2008,5]]},"abstract":"<jats:p>When stationary observers view an optic-flow pattern, visually induced self-motion perception (vection) and a form of motion sickness known as simulator sickness (SS), can result. Previous results suggest that an expanding flow pattern leads to more SS than a contracting pattern. Sensory conflict, a possible cause of SS, may be more salient when an expanding optic-flow pattern is viewed. An experiment was conducted to test if a more salient sensory conflict accompanying expanding flow patterns might inhibit vection. Participants ( n = 15) viewed a pattern of blue squares, either steadily expanded or contracted, on a large rear-projection screen. Vection onset and magnitude were measured for 30 s with a computer-interfaced slide device. Vection onset was significantly faster, and vection magnitude stronger, when a contracting pattern was viewed. We propose that our extensive experience with forward self-motion may form a neural expectancy (exposure-history) about the sensory inputs which typically accompany expanding flow. However, since backward self-motion is less common, there may be a weaker exposure-history for contracting flow, and as a result these patterns generate less salient sensory conflict and subsequently less vection.<\/jats:p>","DOI":"10.1068\/p5781","type":"journal-article","created":{"date-parts":[[2008,5,15]],"date-time":"2008-05-15T06:57:20Z","timestamp":1210834640000},"page":"704-711","source":"Crossref","is-referenced-by-count":49,"title":["Expanding and Contracting Optic-Flow Patterns and Vection"],"prefix":"10.1177","volume":"37","author":[{"given":"Andrea","family":"Bubka","sequence":"first","affiliation":[{"name":"Department of Psychology, Saint Peter's College, 2641 Kennedy Boulevard, Jersey City, NJ 07306, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frederick","family":"Bonato","sequence":"additional","affiliation":[{"name":"Department of Psychology, Saint Peter's College, 2641 Kennedy Boulevard, Jersey City, NJ 07306, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen","family":"Palmisano","sequence":"additional","affiliation":[{"name":"School of Psychology, University of Wollongong, Northfields Avenue, Wollongong 2522, NSW, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2008,1,1]]},"reference":[{"key":"bibr1-p5781","doi-asserted-by":"publisher","DOI":"10.1007\/BF00234916"},{"key":"bibr2-p5781","doi-asserted-by":"publisher","DOI":"10.1068\/p5062"},{"key":"bibr3-p5781","doi-asserted-by":"publisher","DOI":"10.1093\/occmed\/40.3.105"},{"key":"bibr4-p5781","doi-asserted-by":"publisher","DOI":"10.1007\/BF00237897"},{"key":"bibr5-p5781","first-page":"383","volume":"78","author":"Bubka A","year":"2007","journal-title":"Aviation, Space, and Environmental Medicine"},{"key":"bibr6-p5781","first-page":"527","volume":"62","author":"Cheung B S K","year":"1991","journal-title":"Aviation, Space, and Environmental 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