Abstract
Some researches reported that attentional processing speed varies depending on the complexity of form. Here, we investigated whether attentional processing load could be different between visual features (color and orientation) when they were associated to the perception of form using Double Rapid Serial Visual Presentation tasks. In Experiment1, two target alphabets and number symbols were presented with various colors and orientations. Detection performance for the targets was degraded when they were successively presented and their orientations were incongruent. In Experiment2, two target alphabets with a specific color or orientation were presented among alphabets with various colors and orientations. Detection performance for the targets was degraded when they were defined by orientations. These results suggest that orientation would need more attentional processing load than color both when color and orientation are indirectly (Exp.1: form is to-be-detected) and directly (Exp.2: color and orientation are to-be-detected) related to task.
