Sequential priming in hierarchically organized figures: Effects of target level and target resolution

Author(s): Ivry, R. B., Robertson, L. C.

Journal/Book: J Exp Psychol Hum Percep Perf. 1999; 25: 750 First St NE, Washington, DC 20002-4242, USA. Amer Psychological Assoc. 715-729.

Abstract: Three experiments are reported in which participants identified target letters that appeared at either the global or local level of hierarchically organized stimuli. It has been previously reported that response time is facilitated when targets on successive trials appear at the same level (L. M. Ward, 1982; L. C. Robertson, 1996). Experiments 1 and 2 showed that this sequential priming effect can be mediated by target-level information alone, independent of the resolution, or actual physical size, of targets. Target level and resolution were unconfounded by manipulating total stimulus size, such that global elements of the smaller stimuli subtended the same amount of visual angle as local elements of the larger stimuli. Experiment 3, however, showed that when level information is less useful than resolution in parsing targets from distracters, resolution does become critical in intertrial priming. These data are discussed as they relate to the role of attention in local vs. Global (part vs. Whole) processing.

Note: Article Kim N, Univ Calif Berkeley, Dept Psychol, 3210 Tolman Hall, Berkeley,CA 94720 USA

Keyword(s): SPATIAL-FREQUENCY CHANNELS; GLOBAL PRECEDENCE; SELECTIVE ATTENTION; VISUAL-SEARCH; PERCEPTION; FEATURES; INFORMATION; FOREST; PATTERNS; LESIONS

Zurück | Weiter