Contralateral delay activity tracks object identity information in visual short term memory

Gao, Zaifeng; Xu, Xiaotian; Chen, Zhibo; Yin, Jun; Shen, Mowei; Shui, Rende

doi:10.1016/j.brainres.2011.06.049

Cited by 35 publications

(49 citation statements)

References 55 publications

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“…4b. Similar to CDA, LPC amplitude increased significantly from set size two to set size four, F(1,15)¼ 5.64, p¼0.03, replicating previous findings (e.g., Gao et al, 2011). However, unlike CDA, there was a significant interaction between discrimination precision and set size, F(1,15)¼9.23, p¼0.007, resulting from significantly larger LPC for high-precision discrimination than lowprecision condition at set size two, t(15)¼2.93, p¼ 0.009, but not at set size four, t(15)¼ 0.46, p¼0.65.…”

Section: Behavioral Resultssupporting

confidence: 87%

“…Different levels of working memory loads are often coupled with different levels of demands for internal attentional controls from the prefrontal cortex (PFC). Consistent with the critical roles of the PFC in exerting top-down control for working memory storage within posterior regions (McNab and Klingberg, 2008;Roggeman et al, 2013;Voytek and Knight, 2010), the late positive component (LPC) over the PFC appears to be related to the maintenance of working memory (Gao et al, 2011;Kusak et al, 2000;Li et al, 2006). Specifically, Gao et al (2011) observed that the LPC amplitude increased with the number of items retained in working memory.…”

Section: Introductionmentioning

confidence: 59%

“…Because the frontal LPC is related to top-down control of working memory representations (Gao et al, 2011;Li et al, 2006), these results suggest that, when the number of to-be-encoded items is lower than the capacity, higher precision requirements induce more top-down control over working memory. However, as resources for top-down control are exhausted by retaining four items, no further resources can be invested into achieving highprecision discrimination at set size four.…”

Section: Discussionmentioning

confidence: 93%

“…Furthermore, the PFC, especially the dorsolateral prefrontal cortex (DLPFC), is found to play a role of attentional control over working memory maintenance to boost working memory capacity (Curtis and D'Esposito, 2003;McNab and Klingberg, 2008;Roggeman et al, 2013;Voytek and Knight, 2010). However, little research has focused on the correlation between the LPC around the PFC and the pure retention of VWM (Gao et al, 2011). According to the current results, the amplitude of LPC around the PFC during the delay period of working memory, as an ERP indicator of activity in PFC, is not only sensitive to memory load but also sensitive to precision requirements.…”

Section: Discussionmentioning

confidence: 98%

See 3 more Smart Citations

Precision requirements do not affect the allocation of visual working memory capacity

Zhang

et al. 2015

Brain Research

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Section: Behavioral Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 98%

See 2 more Smart Citations

Precision requirements do not affect the allocation of visual working memory capacity

Zhang

et al. 2015

Brain Research

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“…Indeed, the VWM literature contains reports of improved VWM performance when grouping cues are available ( strong collinearity : Anderson, Vogel, & Awh, 2013; similarity : Gao et al, 2011; Lin & Luck, 2009; Morey, Cong, Zheng, Price, & Morey, 2015; Quinlan & Cohen, 2012; similarity and proximity : Brady & Tenenbaum, 2013; Peterson & Berryhill, 2013; Shen, Yu, Xu, & Gao, 2013; amodal completion : Walker & Davies, 2003; connectedness and proximity : Woodman, Vecera, & Luck, 2003; Xu, 2006; common region : Xu & Chun, 2007; depth cues: Kristjánsson, 2006; and contextual grouping : Jiang, Chun & Olson, 2004). Grouping may also add noise to estimates of VWM capacity because some paradigms introduce incidental grouping cues (e.g., similarity, proximity) by choosing stimuli with replacement (e.g., Luck & Vogel, 1997).…”

Section: Introductionmentioning

confidence: 99%

Contralateral delay activity tracks the influence of Gestalt grouping principles on active visual working memory representations

Peterson

Gözenman

Arciniega

et al. 2015

Atten Percept Psychophys

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Recent studies have demonstrated that factors influencing perception, such as Gestalt grouping cues, can influence the storage of information in visual working memory (VWM). In some cases, stationary cues such as stimulus similarity lead to superior VWM performance. However, the neural correlates underlying these benefits to VWM performance remain unclear. One neural index, the contralateral delay activity (CDA) is an event-related potential that shows increased amplitude according to the number of items held in VWM and asymptotes at an individual’s VWM capacity limit. Here, we applied the CDA to determine whether previously reported behavioral benefits supplied by similarity, proximity and uniform connectedness were reflected as a neural savings such that the CDA amplitude was reduced when these cues were present. We implemented VWM change detection tasks with arrays including similarity and proximity (Experiment 1); uniform connectedness (Experiments 2a and 2b); similarity/proximity and uniform connectedness (Experiment 3). The results indicated that when there was a behavioral benefit to VWM, this was echoed by a reduction in CDA amplitude, which suggests more efficient processing. However, not all perceptual grouping cues provided a VWM benefit in the same measure (e.g., accuracy) or of the same magnitude. We also found unexpected interactions between cues. We observed a mixed bag of effects, suggesting that these powerful perceptual grouping benefits are not as predictable in VWM. The current findings indicate that, when grouping cues produce behavioral benefits, there is a parallel reduction in the neural resources required to maintain grouped items within VWM.

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Gestalt grouping cues can improve filtering performance in visual working memory

Allon

Vixman

Luria

2018

Psychological Research

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As part of filtering irrelevant information from entering visual working memory (VWM) and selecting only the relevant information for further processing the system should first tag the pieces of information as relevant or irrelevant. We manipulated difficulty of tagging items as relevant or irrelevant by applying perceptual grouping cues to investigate if it can improve filtering performance in VWM. Participants performed a change-detection task with three targets, six targets, or three targets and three distractors (filtering condition) in the memory display, and were asked to remember the colors (Experiments 1-2) or the orientations (Experiments 3-5) of the targets and ignore the distractors. In the filtering conditions, either the targets (Experiments 1, 3, and 4) or the distractors (Experiments 2 and 5) formed an illusory object (a Kanizsa triangle), appeared in a triangle-like configuration (grouping by proximity), or appeared at random positions (non-grouping). Grouping the targets improved filtering performance relative to non-grouping. Moreover, the illusory object cue further improved filtering performance beyond a proximity cue, but only when the cue was compatible with the task. When the distractors were grouped, the proximity cue improved filtering performance, and the illusory object cue, despite being a potent grouping cue, failed to improve filtering performance when it was compatible with the task. We suggest that the grouping cues advanced tagging of the grouped items. Yet, when the grouping cue strongly enhanced processing of the distractors, the tagging failed, such that the preliminary process of estimating incoming items led to full processing of the grouped items.

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Contralateral delay activity tracks object identity information in visual short term memory

Cited by 35 publications

References 55 publications

Precision requirements do not affect the allocation of visual working memory capacity

Precision requirements do not affect the allocation of visual working memory capacity

Contralateral delay activity tracks the influence of Gestalt grouping principles on active visual working memory representations

Gestalt grouping cues can improve filtering performance in visual working memory

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