Redundant coding assessed in a visual search task
Potential advantages for redundantly coded target elements were assessed using a latency visual search task. Search times for targets that differed from distractors in both color and orientation, color only, or orientation only were compared. The comparisons were performed at six levels of chromatic difference between the target and distractors and at two different levels of orientation discriminability. The results show redundant coding generally did not result in significantly faster search times compared to the other two conditions. Instead, response time for the redundant target was in large part determined by the most discriminable feature; orientation at low levels of chromatic difference and color at high levels of chromatic difference.
redundant coding visual search color reaction time