Prof. Dr. Árni Kristjánsson, 1) School of Health Sciences, University of Iceland; 2) National Research University Higher School of Econom-ics, Moscow, Russian Federation „Single-target visual search tasks provide only a snap-shot of attentional orienting: New insights from visual foraging tasks”
05. Juni 2019 16:00 – 05. Juni 2019 18:00
R 00019 (Dekanatssaal), Fachbereichsgebäude, Gutenbergstr. 18, Erdgeschoss
Prof. Dr. Árni Kristjánsson, 1) School of Health Sciences, University of Iceland; 2) National Research University Higher School of Economics, Moscow, Russian Federation
„Single-target visual search tasks provide only a snap-shot of attentional orienting: New insights from visual foraging tasks”
Visual attention has in past decades mainly been investigated with single-target visual searches. But our goals from one moment to the next are unlikely to involve only a single target, and more recently, paradigms involving visual foraging for multiple targets have been developed. Results from these new tasks call for different interpretations of various phenomena in the attention literature. For example, set-size effects in single-target visual search tasks partly form the foundation of many theories of visual search. Target selection times during foraging revealed a far more intricate pattern than single-target searches: 1) a ‘cruise phase’ where observers select targets very rapidly, far more quickly than typical response times in visual search. 2) During conjunction foraging there were distinct mid-peaks that reflect switches from one target-type to the other 3) Finally there were end-peaks in selection times during both feature and conjunction foraging reflecting slowed responses when observers tap the last target. Strikingly, these end peaks replicate well-known set-size patterns seen during single-target visual search tasks, showing how single-target tasks may only scratch the surface of attentional function, and that typical single-target search patterns are only seen for a limited part of the foraging pattern. Our results show how single-target visual search tasks vastly undersample the operation of visual attention, providing only a snap-shot of attentional function and this limited information is bound to be reflected in theoretical accounts based on such tasks.
Prof. Dr. Christopher Cohrs
FB 04 Psychologie