No Evidence That Articulatory Rehearsal Improves Complex Span Performance

Area of Science:

• Cognitive Psychology
• Neuroscience

Background:

• Articulatory rehearsal is commonly believed to enhance verbal working memory capacity.
• Complex span tasks are standard for assessing working memory, but rehearsal mechanisms remain unclear.

Purpose of the Study:

• To investigate rehearsal patterns in complex span tasks.
• To determine if cumulative rehearsal benefits working memory performance.

Main Methods:

• Experiment 1: Compared overt rehearsal in complex vs. simple span tasks.
• Experiment 2: Trained participants in cumulative rehearsal to assess its causal effect.

Main Results:

• Cumulative rehearsal correlated with accuracy but was less frequent in complex span.
• Training cumulative rehearsal increased its prevalence but not recall accuracy.

Conclusions:

• Rehearsal strategies, including cumulative rehearsal, do not appear to benefit working memory performance in complex span tasks.