Functional specialization for feature-based and symmetry-based groupings in multiple object tracking

Distinguishing the neural mechanism of attentional control and working memory in feature‐based attentive tracking

“…In our fMRI study, we used Contrast 1 (i.e., T4/D4 > T1/D4) and Contrast 2 (i.e., T1/D4 > T1/D1) to manipulate the color complexity of the targets and the distractors, after which we explored the neural mechanisms involved in intragroup feature complexity during attentive tracking. Neuroimaging evidence showed that as the feature complexity within targets increased, the VWM load increased and significantly activated the frontoparietal cortical circuits, which overlapped with those of load‐dependent regions that have been reported in previous fMRI MOT studies (Culham et al., 2001; Howe et al., 2009; Jovicich et al., 2001; Nummenmaa et al., 2017; Wang et al., 2018). It is thus likely that the number of target colors has a similar effect as that of the number of targets.…”

“…The whole fMRI experiment was split into three consecutive scans, which consisted of four conditions per scan. In the three functional scans, the four conditions were presented in three randomized sequences, [B D A C D B C A], [D A B C A D C B], and [C B A D A C B D], and each sequence randomly corresponded to a functional scan (Howe et al., 2009; Wang et al., 2018). Each condition in the sequence was repeated until five trials had occurred and each scan consisted of 40 trials in total.…”

“…, and each sequence randomly corresponded to a functional scan (Howe et al, 2009;Wang et al, 2018). Each condition in the sequence was repeated until five trials had occurred and each scan consisted of 40 trials in total.…”

“…These studies have also found the attentional load increases in order to inhibit the target‐similar distractors (Feria, 2012; Howe & Holcombe, 2012; Makovski & Jiang, 2009; Wang et al., 2019). Thus, we hypothesized that target‐distractor similarity would involve brain areas related to stimulus‐driven attentional capture and goal‐directed attentional control (Asplund et al., 2010; Corbetta & Shulman, 2002; Wang et al., 2018).…”

Multiple-target tracking in human and machine vision

“…Also, tracking accuracy was affected by the chromatic difference between targets and distractors, which may be attributed to the effect of perceptual grouping [55]. Further, in a separate study, fMRI data showed that the putamen and temporoparietal junction (TPJ) may be involved in this color-based grouping [56]. In [57], authors investigated to what extent target-distractor differences in terms of color, contrast polarity, orientation, size, shape, depth, and combination of shape, color, and size influences tracking accuracy.…”