?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Detecting+binocular+3-D+motion+in+static+3-D+noise%3A+No+effect+of+viewing+distance.&rft.creator=Harris%2C+Julie+M.&rft.creator=Sumnall%2C+Jane+H.&rft.subject=Psychophysics&rft.description=Relative+binocular+disparity+cannot+tell+us+the+absolute+3-D+shape+of+an+object%2C+nor+its+3-D+trajectory+if+it+is+moving%2C+unless+the+visual+system+has+independent+access+to+how+far+away+the+object+is+at+any+moment.+Indeed%2C+as+the+viewing+distance+is+changed%2C+the+same+disparate+retinal+motions+will+correspond+to+very+different+real+3-D+trajectories.+In+this+paper+we+were+interested+in+whether+binocular+3-D+motion+detection+is+affected+by+viewing+distance.+We+used+a+visual+search+task+in+which+the+observer+is+asked+to+detect+a+target+dot%2C+moving+in+3-D%2C+amidst+3-D+stationary+distractor+dots.+We+found+that+distance+does+not+affect+detection+performance.+Motion-in-depth+is+consistently+harder+to+detect+than+the+equivalent+lateral+motion%2C+for+all+viewing+distances.+For+a+constant+retinal+motion+with+both+lateral+and+motion-in-depth+components%2C+detection+performance+is+constant+despite+variations+in+viewing+distance+that+produce+large+changes+in+the+direction+of+the+3-D+trajectory.+We+conclude+that+binocular+3-D+motion+detection+relies+on+retinal%2C+not+absolute+visual+signals.&rft.date=2000&rft.type=Preprint&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F849%2F3%2Farch.17dec99.pdf&rft.identifier=++Harris%2C+Julie+M.+and+Sumnall%2C+Jane+H.++(2000)+Detecting+binocular+3-D+motion+in+static+3-D+noise%3A+No+effect+of+viewing+distance.++%5BPreprint%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F849%2F<script src='//archive-bar.soton.ac.uk/archive-bar.js'></script>