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The limits of visual working memory in children: Exploring prioritization and recency effects with sequential presentation.

Authors
  • Berry, Ed D J1
  • Waterman, Amanda H1
  • Baddeley, Alan D2
  • Hitch, Graham J2
  • Allen, Richard J1
  • 1 School of Psychology, University of Leeds.
  • 2 Department of Psychology, University of York.
Type
Published Article
Journal
Developmental psychology
Publication Date
Feb 01, 2018
Volume
54
Issue
2
Pages
240–253
Identifiers
DOI: 10.1037/dev0000427
PMID: 29154649
Source
Medline
License
Unknown

Abstract

Recent research has demonstrated that, when instructed to prioritize a serial position in visual working memory (WM), adults are able to boost performance for this selected item, at a cost to nonprioritized items (e.g., Hu, Hitch, Baddeley, Zhang, & Allen, 2014). While executive control appears to play an important role in this ability, the increased likelihood of recalling the most recently presented item (i.e., the recency effect) is relatively automatic, possibly driven by perceptual mechanisms. In 3 Experiments 7 to 10 year-old's ability to prioritize items in WM was investigated using a sequential visual task (total N = 208). The relationship between individual differences in WM and performance on the experimental task was also explored. Participants were unable to prioritize the first (Experiments 1 and 2) or final (Experiment 3) item in a 3-item sequence, while large recency effects for the final item were consistently observed across all experiments. The absence of a priority boost across 3 experiments indicates that children may not have the necessary executive resources to prioritize an item within a visual sequence, when directed to do so. In contrast, the consistent recency boosts for the final item indicate that children show automatic memory benefits for the most recently encountered stimulus. Finally, for the baseline condition in which children were instructed to remember all 3 items equally, additional WM measures predicted performance at the first and second but not the third serial position, further supporting the proposed automaticity of the recency effect in visual WM. (PsycINFO Database Record

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