Over the last decade, researchers have explored the influence of visual working-memory (WM) load on selective attention in general, by focusing on the modulation of visual WM load on distractor processing in perception. However, there were three distinct hypotheses (perceptual-load hypothesis, resolution hypothesis, and domain-specific hypothesis) with different predictions. While the perceptual-load hypothesis suggests that visual WM capacity load serves as a type of perceptual load, the latter two hypotheses consider visual WM capacity load acting as a type of central executive load, with a constraint that the domain-specific hypothesis claimed that only a content overlap existed between WM load and the perceptual task. By adding a flanker task into the maintenance phase of visual WM, here we attempted to understand the influence of visual WM load on distractor processing. We systematically manipulated the parameters of the task setting between WM and flanker tasks (Experiments 1–4), the perceptual load of flanker task (Experiment 5), the settings of the flanker stimuli and the WM load (Experiment 6), and the content overlap between WM task and flanker task and the exposure time of flanker task (Experiments 7, 8, and 9). However, in 11 out of 12 sub-experiments we consistently found that the visual WM load did not modulate the distractor processing. The implications of these findings are discussed.
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Here we did not use the color pink as in Konstantinou et al. (2014), to improve color distinctions.
Zhang and Luck (2015) used a low load of memorizing two colors. To have a direct comparison with Experiment 1 and manipulating the load more effectively, we used a low memory load of memorizing one color in Experiment 2.
It is worth noting that the letters in Konstantinou et al. (2014) were “X” and “Z”; to be in line with Experiment 1, we used “X” and “N.”
Konstantinou et al. (2014) used a duration of 150 ms, with a question mark of 1,850 ms. The current setting was due to a programming bug. Yet we argue these slight differences should not affect the result pattern.
We thanked an anonymous reviewer for pointing out this possibility.
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This research was supported by National Key R&D Program of China(2019YFB1600504)
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Yao, N., Guo, Y., Liu, Y. et al. Visual working-memory capacity load does not modulate distractor processing. Atten Percept Psychophys (2020). https://doi.org/10.3758/s13414-020-01991-7
- Visual working memory
- Selective attention
- Distractor processing