Attentional Capture In Three-dimensional Space And The Role Of The Fixation Point

Selective attention is when we receive a lot of information from the externalenvironment, we tend to select certain information which is processed with particularcharacteristics, while some other unrelated information ignored. Currently, most ofselective attention theories are based on research under conditions resultingtwo-dimensional. But in real life, we are in a three-dimensional world, so whether thedistribution theory of attention from two-dimensional condition can be extended tothree-dimensional field has been controversial. In this study, we use the additionalsingleton paradigm to discuss if attentional capture of the interference propertiesunder three-dimensional condition are different from those produced oftwo-dimensional condition. In our first experiment, we explore the attentional capturegenerated by different attributes of interference in experimental condition. The resultsshowed that the attentional capture is not significant, and the set of3-d condition didnot play a role. May be due to the fixation point presentation which leading to a notcomplete perception of3-d in a short time and impacting the size of the window ofattention. The second experiment with the overall background of deepening way toremind the subjects to pay attention on it, and the fixation is deleted. The results showthat when there is a green circle as a singular color stimuli, when subjects weresignificantly slowed reaction search target, indicating that the subjects appeared forthe first time to attentional capture. The three-dimensional effect is not significant inthe second experiment, indicating that although the role of deep space produced, butmay not be as big as previous researchers expected that due to the depth of theconditions set does not enough to affect the adding reaction time from the strongattentional capture which is bring by the singularity stimuli. Therefore, we can inferthat attention on the depth distribution is not "depth-blind" but may not be as strong aspredecessors expected.