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Coding of featural information in visual working memory in 2.5-year-old toddlers. | LitMetric

AI Article Synopsis

  • Infants' visual working memory (VWM) capacity grows significantly in the early years, but the mechanisms behind this storage capacity remain unclear.
  • In a study involving 2.5-year-olds, toddlers successfully remembered unique object-location pairs but struggled with pairs that shared features, indicating a potential limit in VWM when items are similar.
  • The results suggest that while similar items don't directly impair memory, they may lead to "catastrophic forgetting," where forgetting one item causes forgetting of others.

Article Abstract

The number of objects that infants can remember in visual working memory (VWM) increases rapidly during the first few years of life (Kaldy & Leslie, 2005; Ross-Sheehy, Oakes, & Luck, 2003). However, less is understood about the of VWM: whether storage is determined by fixed-precision memory slots, or the allocation of a limited continuous resource. In the current study, we adapted the Delayed Match Retrieval eye-tracking paradigm (Kaldy, Guillory, & Blaser, 2016), to test 2.5-year-old toddlers' ability to remember three object-location bindings when the to-be-remembered objects were all unique (Experiment 1) versus when they shared features such as color or shape (Experiment 2). 2.5-year-olds succeeded in Experiment 1, but only performed marginally better than chance in Experiment 2. Interestingly, when incorrect, participants in Experiment 2 were no more likely to select a decoy item that shared a feature with the target item. It seems that the increased similarity of to-be-remembered objects did not impair memory for the objects directly, but instead increased the likelihood of catastrophic forgetting.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8297794PMC
http://dx.doi.org/10.1016/j.cogdev.2020.100892DOI Listing

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