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Full-Text Articles in Life Sciences
Stereoscopic Discrimination Of The Layout Of Ground Surfaces, Robert S. Allison, Barbara J. Gillam, Stephen A. Palmisano
Stereoscopic Discrimination Of The Layout Of Ground Surfaces, Robert S. Allison, Barbara J. Gillam, Stephen A. Palmisano
Faculty of Health and Behavioural Sciences - Papers (Archive)
Safe and effective locomotion depends critically on judgements of the surface properties of the ground to be traversed. Little is known about the role of binocular vision in surface perception at distances relevant to visually guided locomotion in humans. Programmable arrays of illuminated targets were used to present sparsely textured surfaces with real depth at distances of 4.5 and 9.0 m. Psychophysical measurements of discrimination thresholds demonstrated a clear superiority for stereoscopic over monocular judgments of relative and absolute surface slant. Judgements of surface roughness in particular demonstrated a substantial binocular advantage. Binocular vision is thus shown to directly contribute …
Infants' Discrimination Of Faces By Using Biological Motion Cues, Janine Spencer, Justin O'Brien, Alan Johnston, Harold C. Hill
Infants' Discrimination Of Faces By Using Biological Motion Cues, Janine Spencer, Justin O'Brien, Alan Johnston, Harold C. Hill
Faculty of Health and Behavioural Sciences - Papers (Archive)
We report two experiments in which we used animated averaged faces to examine infants' ability to perceive and discriminate facial motion. The faces were generated by using the motion recorded from the faces of volunteers while they spoke. We tested infants aged 4 ^ 8 months to assess their ability to discriminate facial motion sequences (condition 1) and discrim- inate the faces of individuals (condition 2). Infants were habituated to one sequence with the motion of one actor speaking one phrase. Following habituation, infants were presented with the same sequence together with motion from a different actor (condition 1), or …