視覚探索課題における3次元文脈の効果

抄録

This study examined how a three-dimensional (3D) background depicted by pictorial cues serves as a context in a visual search task. The task was to search for a target cube differentiated from distractor cubes by a perceptual slant. The reaction time for detecting the target was measured. When the search items were shaded cubes with clear 3D interpretations (Experiment 1), a background with the same perceptual slant as the distractors facilitated the search performance in target-present trials. However, when the search items were linedrawings of cubes without shading which had ambiguous 3D interpretations (Experiment 2), the facilitation in target-present trials was eliminated. We suggest that the background is influential when the perceptual load on the processing of search items is low.