Dual N-Back Working Memory Training in Healthy Adults: A Randomized Comparison to Processing Speed Training

Area of Science:

• Cognitive Neuroscience
• Adult Development

Background:

• Cognitive enhancement is sought by middle-aged adults to maintain function and prevent age-related decline.
• Computerized working memory training is a studied cognitive enhancement method, but its impact on middle-aged adults is less understood.

Purpose of the Study:

• To investigate the effects of dual n-back working memory training on cognitive functions in healthy middle-aged adults.
• To assess improvements in working memory, processing speed, and fluid intelligence after a 5-week training program.

Main Methods:

• Fifty-seven healthy adults aged 30-60 participated.
• Participants underwent a 5-week web-based dual n-back or active control (processing speed) training program.
• Cognitive measures for working memory, processing speed, and fluid intelligence were administered pre- and post-training.

Main Results:

• No significant improvements were found across working memory, processing speed, and fluid intelligence composites after training.
• Bayesian analyses supported null findings, indicating no training effects on individual cognitive composites.
• Dual n-back training did not appear to benefit working memory or fluid intelligence in this healthy adult population.

Conclusions:

• Dual n-back working memory training may not enhance cognitive functions in healthy middle-aged adults.
• Further research is required to determine if other working memory training approaches benefit this demographic.
• Investigating factors influencing training outcomes is necessary for future cognitive enhancement studies.