Abstract
Observers are faster to find and discriminate a target pair of adjacent, same-shaped objects that are within the same perceptual group (within group) versus within adjacent perceptual groups. Manipulating the probability of a within-group pair modulated this grouping effect such that it increased as the percentage of within-group trials (25%, 50%, or 75%) increased. This probability effect was stronger for extrinsic grouping factors (common region and connectedness) than for intrinsic factors (proximity and color similarity). Further experiments, however, suggested that this extrinsic-intrinsic difference was due to differences in overall speed with which the target pair was found. The results are interpreted as indicating that grouping is sensitive to top-down influences as long as there is sufficient time for feedback to operate.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1071-1084 |
| Number of pages | 14 |
| Journal | Journal of Experimental Psychology: Human Perception and Performance |
| Volume | 28 |
| Issue number | 5 |
| DOIs | |
| State | Published - Oct 2002 |
| Externally published | Yes |
ASJC Scopus subject areas
- Experimental and Cognitive Psychology
- Arts and Humanities (miscellaneous)
- Behavioral Neuroscience