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Multiple-object tracking and visually guided touch
Attention, Perception, & Psychophysics ( IF 1.7 ) Pub Date : 2021-03-30 , DOI: 10.3758/s13414-021-02291-4
Mallory E Terry 1 , Lana M Trick 1
Affiliation  

Multiple-object tracking (MOT) involves keeping track of the positions of multiple independent target items as they move among distractors. According to Pylyshyn (Cognition, 80, 127–158, 2001), the item individuation mechanism used in MOT is also used in visually guided touch. To test this, we compared single-task MOT (MOT alone) with dual-task MOT (MOT while touching items that changed colour), looking for interference: cases where single-task performance was worse than dual-task. Touching items that changed colour interfered with MOT, but effects varied depending on whether the item touched was a target or distractor in MOT. Touching distractors always reduced MOT performance more than touching targets. Touching targets during MOT did not interfere when there was only a single target to track but interfered more once there were two or more targets. We also measured interference based on latencies to touch items that changed colour, comparing single and dual-task conditions (touch alone, touch + track). MOT interfered with touch, increasing RT to touch items that changed colour, with latencies significantly higher when those items were distractors rather than targets. Overall, there was general interference (differences between single and dual-task performance), as might be expected if coordinating the two tasks required a common limited resource such as general attention or working memory. However, there was also differential interference that varied based on whether the touched item was a target or distractor in MOT. This differential interference suggests the specific mechanisms used in MOT may also play a role in visually guided touch.



中文翻译:

多目标跟踪和视觉引导的触摸

多对象跟踪(MOT)涉及跟踪多个独立目标项目在分散器之间移动时的位置。根据Pylyshyn(Cognition,80,127–158,2001年),MOT中使用的商品个性化机制也用于视觉引导的触摸。为了测试这一点,我们比较了单任务MOT(仅MOT)和双任务MOT(触摸变色物品时的MOT),以查找干扰:单任务性能比双任务差的情况。触摸变色的物品会干扰MOT,但是效果会有所不同,具体取决于所触摸的物品是MOT中的目标还是干扰物。碰触干扰物总是比碰触目标降低MOT性能。当仅跟踪一个目标时,在MOT期间触摸目标不会产生干扰,但在有两个或多个目标时会产生更多干扰。我们还根据触摸更改颜色的项目的延迟来测量干扰,比较了单任务和双任务条件(单独触摸,触摸+跟踪)。MOT会干扰触摸,从而增加RT来触摸变色的项目,而当这些项目是干扰因素而不是目标时,延迟会大大增加。总体而言,通用干扰(单任务和双任务性能之间的差异),如果协调两个任务需要共同的有限资源(如一般注意力或工作记忆),这可能是预期的。但是,根据被触摸的项目是MOT中的目标还是干扰因素差异干扰也会有所不同。这种不同的干扰表明,MOT中使用的特定机制也可能在视觉引导的触摸中起作用。

更新日期:2021-03-30
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