Visual orienting in dynamic broadband (1/f) noise sequences.
Visual orienting has typically been characterized using simple displays--for example, displays with a static target placed on a homogeneous background. In the present study, visual orienting was investigated using a dynamic broadband (1/f) noise display that should mimic a more naturalistic setting and that should allow saccadic orienting experiments to be performed with fewer constraints. In Experiment 1, it was shown that the noise movie contains gaze-attracting features that are almost as distinct as the ones measured for (static) real-word scenes. The movie can therefore serve as a strong distractor. In Experiment 2, observers carried out a luminance target search that showed that saccadic amplitude errors were substantially higher (18%) than the ones measured in simple displays. That error is certainly one of the primary factors making gaze-fixation prediction in complex scenes difficult. Supplemental figures for this study may be downloaded from http://app.psychonomic-journals.org/content/supplemental.
Rasche
Christoph
C
Justus-Liebig-Universität, Giessen, Germany. rasche15@gmail.com
Gegenfurtner
Karl R
KR
D000328:Adult; D005260:Female; D005403:Fixation, Ocular; D006801:Humans; D008297:Male; D009622:Noise; D011930:Reaction Time; D014796:Visual Perception; D055815:Young Adult