?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Self-motion+and+the+perception+of+stationary+objects&rft.creator=Wexler%2C+Mark&rft.creator=Panerai%2C+Francesco&rft.creator=Lamouret%2C+Ivan&rft.creator=Droulez%2C+Jacques&rft.subject=Behavioral+Neuroscience&rft.subject=Perceptual+Cognitive+Psychology&rft.subject=Psychophysics&rft.description=One+of+the+ways+we+perceive+shape+is+through+seeing+motion.+Visual+motion+may+be+actively+generated+(for+example%2C+in+locomotion)%2C+or+passively+observed.+In+the+study+of+how+we+perceive+3D+structure+from+motion+(SfM)%2C+the+non-moving%2C+passive+observer+in+an+environment+of+moving+rigid+objects+has+been+used+as+a+substitute+for+an+active+observer+moving+in+an+environment+of+stationary+objects%3B+the+'rigidity+hypothesis'+has+played+a+central+role+in+computational+and+experimental+studies+of+SfM.+Here+we+demonstrate+that+this+substitution+is+not+fully+adequate%2C+because+active+observers+perceive+3D+structure+differently+from+passive+observers%2C+despite+experiencing+the+same+visual+stimulus%3A+active+observers'+perception+of+3D+structure+depends+on+extra-visual+self-motion+information.+Moreover%2C+the+visual+system%2C+making+use+of+the+self-motion+information+treats+objects+that+are+stationary+(in+an+allocentric%2C+earth-fixed+reference+frame)+differently+from+objects+that+are+merely+rigid.+These+results+show+that+action+plays+a+central+role+in+depth+perception%2C+and+argue+for+a+revision+of+the+rigidity+hypothesis+to+incorporate+the+special+case+of+stationary+objects.%0A&rft.date=2000-07&rft.type=Preprint&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F950%2F3%2Frevised.pdf&rft.identifier=++Wexler%2C+Mark+and+Panerai%2C+Francesco+and+Lamouret%2C+Ivan+and+Droulez%2C+Jacques++(2000)+Self-motion+and+the+perception+of+stationary+objects.++%5BPreprint%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F950%2F