The Impact Of Speed Of Movement, Number Of Objects And Tracking Duration On Multiple Object Visual Tracking Performance And Strategy

Multiple object tracking (MOT), a problem extremely common in daily life and anissue hot in psychological research, involves in cognitive processes such as theories ofvisual attention and working memory. As a kind of classic paradigm in study of visualattention while tracking moving objects, it is often used to study the behavior of responseto the change of object features when the participants are tracking those objectsrandomly moving within the field of view.This study investigated the impact of number of objects, duration of movement andspeed of movement on tracking performance and tracking strategy with the paradigm ofmultiple object tracking through three experiments, according to the eye movement dataaccurately recorded by EyeLink for each participator during tracking. The first experimentinvestigated the impact of number of objects, duration of movement and speed ofmovement on tracking performance and tracking strategy under the condition of fixedduration; the second one investigated the impact of number of objects, duration ofmovement and speed of movement on tracking performance and tracking strategy underthe condition of fixed speed and the third one surveyed the impact of number ofobjects, duration of movement, speed of movement, collisions among objects and betweentargets and edge on tracking performance and tracking strategy under the condition of fixednumber of objects.The results of the study were shown in the thesis:(1) Tracking performance is restricted by the resources of attention for it declines asthe resources shared by each object decrease with the increase of number of objects, speedof movement and duration of movement.(2) The participants prefer to target tracking strategy in the case of number of objects changes, while, they will use kinds of tracking strategy as speed of movement and durationof movement changes. Specially, when number of objects reach5, they will turn tochoose non-target tracking strategy.(3) Tracking performance declines with the increase of number of collisions amongthe objects and between the objects and edge.