Abstract
Time-to-contact (TTC) estimation is critical for daily activities, assessing when a moving object will reach a location. TTC tasks are used to study motion processing. In the TTC tasks, time structure (T) refers to the ratio of the durations of the motions in two phases: (a) one in which the stimulus is visible before it reaches occlusion point and (b) one in which it is invisible after it reaches occlusion point. The condition of T = 1.0, which indicates that the time spent moving is the same across the two segments, is called an equal time structure; otherwise, it is called an unequal time structure condition (T ≠ 1.0). The present study investigated the effect of cognitive load on TTC estimation across different time structures using a dual-task paradigm across two experiments. Experiment 1 showed that when visual velocity was available, high cognitive load enhanced participants performance in T ≠ 1.0, but had no effect on T = 1.0. Experiment 2, isolating visual velocity information, showed no significant differences in performance across different cognitive loads. These findings indicated that cognitive load could have a differential effect on TTC estimation in relation to visual velocity cues and time structure, offering insights into optimizing cognitive processes associated with time judgments.
Get full access to this article
View all access options for this article.
References
Supplementary Material
Please find the following supplemental material available below.
For Open Access articles published under a Creative Commons License, all supplemental material carries the same license as the article it is associated with.
For non-Open Access articles published, all supplemental material carries a non-exclusive license, and permission requests for re-use of supplemental material or any part of supplemental material shall be sent directly to the copyright owner as specified in the copyright notice associated with the article.
