Coarse-to-Fine Construction for High-Resolution Representation in Visual Working Memory

Gao, Zaifeng; Ding, Xiaowei; Yang, Tianfeng; Liang, Junying; Shui, Rende

doi:10.1371/journal.pone.0057913

Cited by 33 publications

(43 citation statements)

References 59 publications

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“…The authors concluded that for complex objects, the CDA might reflect information load in VSTM that is determined by both number and resolution of the objects. It has further been shown that the resolution of VSTM representations increases with the duration of the memory array (Gao et al, 2013). For short processing times, like that used in the current study and in most similar studies, the CDA reflects maintenance of coarse representations.…”

Section: Discussionmentioning

confidence: 99%

The lasting memory enhancements of retrospective attention

et al. 2016

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Behavioral research has shown that spatial cues that orient attention toward task relevant items being maintained in visual short-term memory (VSTM) enhance item memory accuracy. However, it is unknown if these retrospective attentional cues (“retro-cues”) enhance memory beyond typical short-term memory delays. It is also unknown whether retro-cues affect the spatial information associated with VSTM representations. Emerging evidence suggests that processes that affect short-term memory maintenance may also affect long-term memory (LTM) but little work has investigated the role of attention in LTM. In the current event-related potential (ERP) study, we investigated the duration of retrospective attention effects and the impact of retrospective attention manipulations on VSTM representations. Results revealed that retro-cueing improved both VSTM and LTM memory accuracy and that posterior maximal ERPs observed during VSTM maintenance predicted subsequent LTM performance. N2pc ERPs associated with attentional selection were attenuated by retro-cueing suggesting that retrospective attention may disrupt maintenance of spatial configural information in VSTM. Collectively, these findings suggest that retrospective attention can alter the structure of memory representations, which impacts memory performance beyond short-term memory delays.

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Section: Discussionmentioning

confidence: 99%

The lasting memory enhancements of retrospective attention

et al. 2016

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“…This prediction seems to have been supported by a recent ERP study. Gao, Ding, Yang, Liang, and Shui (2013) used the CDA component as a neural marker and asked participants to remember two and four complex shapes in different exposure duration conditions (100 ms vs. 500 ms). They observed that CDA was higher for four complex shapes than two complex shapes at 100 ms exposure duration, yet this difference vanishes at 500 ms exposure duration.…”

Section: Methodsmentioning

confidence: 99%

A two-phase model of resource allocation in visual working memory.

C¹,

Hu²,

Li³

et al. 2017

Journal of Experimental Psychology: Learning, Memory, and Cogni

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Two broad theories of visual working memory (VWM) storage have emerged from current research, a discrete slot-based theory and a continuous resource theory. However, neither the discrete slot-based theory or continuous resource theory clearly stipulates how the mental commodity for VWM (discrete slot or continuous resource) is allocated. Allocation may be based on the number of items via stimulus-driven factors, or it may be based on task demands via voluntary control. Previous studies have obtained conflicting results regarding the automaticity vs. controllability of such allocation. In the current study, we propose a two-phase allocation model, in which the mental commodity could be allocated only by stimulus-driven factors in the early consolidation phase. However, when there is sufficient time to complete the early phase, allocation can enter the late consolidation phase, where it can be flexibly and voluntarily controlled according to task demands. In an orientation recall task, we instructed participants to store either fewer items at high-precision or more items at low-precision. In three experiments, we systematically manipulated memory set size and exposure duration. We did not find an effect of task demands when the set size was high and exposure duration was short. However, when we either decreased the set size or increased the exposure duration, we found a trade-off between the number and precision of VWM representations. These results can be explained by a two-phase model, which can also account for previous conflicting findings in the literature.

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“…Several studies reported that manipulating the stimulus contrast in the change detection paradigm, while resulting in an impaired behavioral performance, did not have any effect on the CDA (Gao et al, 2013; Ikkai et al, 2010; Luria et al, 2010; Ye et al, 2014). This result is significant because it reveals a dissociation between the low accuracy performance (usually taken as a marker of VWM capacity) and the intact CDA amplitude, and serves as additional evidence that the CDA does not simply reflect the task difficulty.…”

Section: The Cda As An Index Of Vwm Capacitymentioning

confidence: 99%

The contralateral delay activity as a neural measure of visual working memory

Luria

Balaban

Awh

et al. 2016

Neuroscience & Biobehavioral Reviews

277

245

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The contralateral delay activity (CDA) is a negative slow wave sensitive to the number of objects maintained in visual working memory (VWM). In recent years, a growing number of labs started to use the CDA in order to investigate VWM, leading to many fascinating discoveries. Here, we discuss the recent developments and contribution of the CDA in various research fields. Importantly, we report two meta-analyses that unequivocally validate the relationship between the set-size increase in the CDA amplitude and the individual VWM capacity, and between the CDA and filtering efficiency. We further discuss how the CDA was used to study the role of VWM in visual search, multiple object tracking, grouping, binding, and whether VWM capacity allocation is determined by the items’ resolution or instead by the number of objects regardless of their complexity. In addition, we report how the CDA has been used to characterize specific VWM deficits in special populations.

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Coarse-to-Fine Construction for High-Resolution Representation in Visual Working Memory

Cited by 33 publications

References 59 publications

The lasting memory enhancements of retrospective attention

The lasting memory enhancements of retrospective attention

A two-phase model of resource allocation in visual working memory.

The contralateral delay activity as a neural measure of visual working memory

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