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The Time Sequence of Face Spatial Frequency Differs During Working Memory Encoding and Retrieval Stages.

Anqing Wang1, Enguang Chen1, Hang Zhang1

  • 1School of Psychology, Shandong Normal University, Jinan, China.

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|June 7, 2022
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Summary
This summary is machine-generated.

Working memory load impacts how we process faces. During encoding, processing is less fine-grained, but during retrieval, it shifts to a coarse-to-fine sequence influenced by working memory (WM) load.

Keywords:
coarse-to-fine sequenceconfigural processingfacespatial frequencyworking memory

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Area of Science:

  • Cognitive Neuroscience
  • Human Face Perception
  • Working Memory Research

Background:

  • Previous research suggests face processing follows a coarse-to-fine sequence, with P1 and P2 components sensitive to configural and featural processing, respectively, under sufficient attention.
  • The influence of working memory (WM) load on the temporal dynamics of configural and featural face processing, particularly during encoding versus retrieval, remains unclear.

Purpose of the Study:

  • To investigate the role of working memory (WM) load in modulating the time course of configural and featural face processing.
  • To examine how WM load affects face processing at different stages (encoding and retrieval) and across varying spatial frequencies (SF).

Main Methods:

  • Utilized a delayed recognition task involving faces with varying spatial frequencies (SF) and different working memory (WM) loads.
  • Recorded behavioral data and event-related potentials (ERPs) to analyze neural responses during face encoding and retrieval.

Main Results:

  • Working memory (WM) load significantly modulated face spatial frequency (SF) processing.
  • During encoding, P1 and P2 were sensitive to broadband SF (BSF) faces, while N170 responded to low SF (LSF) and BSF faces.
  • During retrieval, P1 (right hemisphere) showed sensitivity to BSF faces, N170 to LSF faces (especially under low load), and P2 to high SF (HSF) faces (especially under high load).

Conclusions:

  • Face perception is less fine-grained during the encoding stage.
  • Face perception follows a coarse-to-fine sequence during the retrieval stage, with processing influenced by working memory (WM) load.
  • Low WM load emphasizes coarse information processing, while high WM load emphasizes fine information processing during face retrieval.