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# How to boost your brain power - Insights from cognitive neuroscience.

Forget hyped smart drugs and brain-training apps. Cognitive neuroscience reveals that deliberate monotasking and intentional rest are the true scientific secrets to optimizing your working memory.

- **Speakers:** Roland Grabner
- **Event:** World Congress 2023
- **Published:** August 11, 2023
- **Duration:** 29:55
- **URL:** https://www.wearedevelopers.com/videos/629-how-to-boost-your-brain-power-insights-from-cognitive-neuroscience

## Summary

The human working memory acts as a vital mental workplace but is strictly limited to holding four to five items of information simultaneously. Because working memory forms the foundation of human intelligence, many attempt to expand its capacity using hyped methods like brain-training applications, smart drugs, or transcranial electrical stimulation. However, cognitive neuroscience reveals that these techniques yield negligible to small effect sizes in healthy adults. Brain training fails to generalize beyond the specific practiced tasks, smart drugs carry health risks without significant working memory benefits, and electrical stimulation only provides meaningful improvements when correcting abnormal brain activity rather than enhancing healthy function.

Instead of artificially expanding capacity, true cognitive enhancement comes from optimizing existing resources through strategic learning. Actively connecting new information to an established long-term knowledge base frees up working memory, allowing individuals to recognize patterns automatically—the exact mechanism that separates world-class experts from novices. Furthermore, deliberate monotasking is essential; multitasking fragments limited attention, significantly decreasing performance by a large 0.7 effect size and leaving individuals more susceptible to persuasion due to impaired critical reflection.

Finally, periods of deliberate disengagement are critical for memory consolidation. Providing the brain with brief, input-free downtime immediately after complex learning strengthens synaptic connections, similar to how eight hours of sleep processes daily information. This intentional disconnection prevents cognitive overload and creates space for creative problem-solving, proving that optimal brain power relies equally on highly focused attention and unstructured rest.

**Keywords:** cognitive neuroscience, working memory capacity, memory consolidation strategies, brain training generalization, smart drugs limitations, transcranial electrical stimulation, deliberate monotasking, multitasking cognitive detriments, long-term memory integration, knowledge base connections, ADHD cognitive enhancers, unstructured cognitive rest, expert problem solving strategies, effect size in psychology, attentional capacity limits

## Chapters

1. **Testing the limited capacity of human working memory** (02:18) — A simple memorization exercise reveals that human working memory can only process four to five pieces of information simultaneously.
1. **Measuring cognitive enhancement methods using effect sizes** (05:41) — Understanding statistical effect sizes helps evaluate whether popular cognitive enhancement methods actually provide meaningful intelligence improvements.
1. **Evaluating the actual effectiveness of regular brain training** (07:48) — While regular brain training improves performance on specific practiced tasks, it fails to significantly increase overall working memory or general intelligence.
1. **Analyzing the impact of smart drugs on healthy adults** (11:43) — Pharmacological cognitive enhancers yield negligible working memory improvements in healthy people while posing short and long-term health risks.
1. **Assessing the results of electrical brain stimulation devices** (13:58) — Transcranial electrical stimulation offers minimal benefits for healthy individuals and requires abnormally low baseline brain activity to be truly effective.
1. **Boosting working memory through long-term knowledge connections** (16:51) — Connecting new information to an established long-term knowledge base efficiently frees up working memory capacity for complex problem-solving.
1. **Forcing the brain to actively map new connections** (21:07) — Deliberately mapping new concepts to existing knowledge through mechanisms like mind maps drastically improves information retention and cognitive performance.
1. **Improving cognitive performance through deliberate monotasking habits** (22:37) — Focusing on single tasks prevents working memory fragmentation and protects the brain against the uncritical acceptance of incoming information.
1. **Strengthening mental connections through deliberate unstructured free time** (24:07) — Removing cognitive stimulation allows the brain to naturally consolidate memory connections and generate creative ideas without requiring active effort.
1. **Conclusion and audience questions on cognitive enhancement practices** (26:01) — Maintaining healthy sleep patterns and balanced nutrition provides more reliable overall cognitive support than seeking artificial brain enhancements.

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