Goal-driven modulation of oculomotor capture.
In a recent study, Ludwig and Gilchrist (2002) showed that stimulus-driven oculomotor capture by abrupt onset distractors was modulated by distractor-target similarity: Participants were more likely to fixate an irrelevant onset when it shared the target color. Here we test whether this pattern of performance is the result of (1) inhibition of all items in the distractor color, (2) a response bias to local color discontinuities, or (3) the integration of stimulus-driven abrupt onset signals with goal-driven information about the target features. The results of two experiments clearly support the third explanation. We conclude that oculomotor capture is modulated by, but not contingent upon, top-down control, and our findings argue for an integrative view of the saccadic system.
Ludwig
Casimir J H
CJ
Department of Experimental Psychology, University of Bristol, Bristol, England. c.ludwig@bristol.ac.uk
Gilchrist
Iain D
ID
D000293:Adolescent; D000328:Adult; D001288:Attention; D003118:Color Perception; D004193:Discrimination Learning; D005260:Female; D005364:Field Dependence-Independence; D006040:Goals; D006801:Humans; D008297:Male; D009949:Orientation; D010364:Pattern Recognition, Visual; D011601:Psychophysics; D012438:Saccades