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

Area of Science:

• Cognitive Psychology
• Developmental Psychology
• Neuroscience

Background:

• Adults can prioritize specific items in visual working memory (WM), boosting performance for selected items at the expense of others.
• This prioritization ability is linked to executive control, but the recency effect (enhanced recall of the last item) may be automatic and perceptually driven.

Purpose of the Study:

• To investigate the ability of 7- to 10-year-old children to prioritize items in visual working memory.
• To explore the relationship between individual differences in WM and performance on a sequential visual task in children.
• To determine if children possess the executive resources for strategic item prioritization in WM.

Main Methods:

• Three experiments were conducted with 208 children aged 7-10 years.
• A sequential visual task was used to assess working memory prioritization.
• Individual differences in working memory were measured and correlated with task performance.

Main Results:

• Children were unable to prioritize the first or final item in a 3-item sequence.
• Consistent and significant recency effects were observed, with children recalling the final item more accurately.
• Baseline WM measures predicted performance for earlier serial positions but not the final position, supporting the automaticity of the recency effect.

Conclusions:

• Children aged 7-10 appear to lack the executive resources to prioritize specific items within a visual sequence in working memory.
• Children demonstrate automatic memory benefits for the most recently presented stimulus (recency effect).
• The recency effect in visual working memory seems to operate independently of executive control in this age group.