title: Visual Search for Motion-Form Conjunctions: Selective Attention to Movement Direction.
abstract: In 2 experiments requiring visual search for conjunctions of motion and form, the authors reinvestigated whether motion-based filtering (e.g., P. McLeod, J. Driver, Z. Dienes, & J. Crisp, 1991) is direction selective and whether cuing of the target direction promotes efficient search performance. In both experiments, the authors varied the number of movement directions in the display and the predictability of the target direction. Search was less efficient when items moved in multiple (2, 3, and 4) directions as compared with just 1 direction. Furthermore, precuing of the target direction facilitated the search, even with "wrap-around" displays, relatively more when items moved in multiple directions. The authors proposed 2 principles to explain that pattern of effects: (a) interference on direction computation between items moving in different directions (e.g., N. Qian & R. A. Andersen, 1994) and (b) selective direction tuning of motion detectors involving a receptive-field contraction (cf. J. Moran & R. Desimone, 1985; S. Treue & J. H. R. Maunsell, 1996).
authors.affiliation: a Institut für Allgemeine Psychologie Universität Leipzig , Leipzig , Germany.
authors.forename: Adrian
authors.initials: A
authors.lastname: Von Mühlenen
authors.affiliation: a Institut für Allgemeine Psychologie Universität Leipzig , Leipzig , Germany.
authors.forename: Hermann J
authors.initials: HJ
authors.lastname: Müller