Visual comparisons within and between object parts: evidence for a single-part superiority effect.
Subjects judged whether two marks placed at different positions along a curved contour were physically the same. When targets were separated by a concave curvature extremum--corresponding to a part-boundary--decision latencies were longer than when they straddled an equally curved convex extremum, demonstrating a "single-part superiority effect". This difference increased with both stimulus duration and the magnitude of contour curvature. However, it disappeared when the global configuration was not consistent with a part-boundary interpretation, suggesting a critical role of global organization in part decomposition.
Barenholtz
Elan
E
Department of Psychology, Center for Cognitive Science, Rutgers University, New Brunswick, NJ 08854-8020 USA. elanbz@ruccs.rutgers.edu
Feldman
Jacob
J
D005556:Form Perception / Q000502:physiology*; D006801:Humans; D011601:Psychophysics; D011930:Reaction Time