{"id":6772,"date":"2017-03-23T10:34:34","date_gmt":"2017-03-23T17:34:34","guid":{"rendered":"https:\/\/www.scotthyoung.com\/blog\/?p=6772"},"modified":"2019-04-28T07:11:04","modified_gmt":"2019-04-28T15:11:04","slug":"neurosci-of-expertise","status":"publish","type":"post","link":"https:\/\/www.scotthyoung.com\/blog\/2017\/03\/23\/neurosci-of-expertise\/","title":{"rendered":"How the Brain Changes with Expertise"},"content":{"rendered":"

How does the brain rewire itself as you learn things? Recently, I came across some interesting research<\/a> that used fMRI to visualize how the brain changes as you learn something new.<\/p>\n

The first interesting tidbit is that brain activation goes down as you learn. The better a subject got at a skill, the less of their brain was being used actively.<\/p>\n

\"\"<\/p>\n

At first this might sound surprising. Think of the old myth is that human beings are only using 10% of our brains. Even if you didn’t believe that, you might still be inclined to think that using more brain is better. Instead the opposite seems to be true\u2014those better at a skill are actually using less!<\/p>\n

Thinking a bit more, however, and this decrease in brain activity should make sense. As you learn something, your brain wires more specialized circuitry for solving the problem with less effort. Using less of your brain is an advantage, since that is more efficient.<\/p>\n

This also explains why focus is so important in learning. When the subjects started learning the frontal and parietal cortices, believed to be involved in the control of attention and planning, are considerably more active. After reaching proficiency in the skill, however, this additional activation goes down considerably.<\/p>\n

Learning Changes Mental Strategies<\/h2>\n

The second piece of information from this research I found interesting was that learning often involves changing mental strategies to solve the problem at hand. In other words, what you\u2019re actually doing when performing a skill as a novice and as an expert are often radically different.<\/p>\n

The example studied in the research involved teaching subjects mirror reading:<\/p>\n

\u201cearly practice involves mental rotation of the letters, and late performance involves recognition of the rotated word and recall of the meaning without slow algorithmic rotation\u201d<\/p><\/blockquote>\n

Novice mirror readers\u2019 visual cortices would light up as they mentally rotated the image of the word they were reading in order to recognize it with their normal reading pattern recognition. As they got better, pattern recognition learned to just recognize the mirrored words without flipping them in the mind’s eye first.<\/p>\n

Language learners often experience a similar phenomenon. When they start learning a language they \u201cthink in translation\u201d coming up with the word in their native language first, and only after searching for the correct translation of the word to use.<\/p>\n

Now we have confirmation that these types of strategy shifts actually do occur in the brain.<\/p>\n

Early and Late-Stage Learning Strategies<\/h2>\n

Researchers call this shift in neural activation due to changes in mental strategy functional reorganization<\/em>.<\/p>\n

Functional reorganization is a useful concept for making sense of many learning situations.<\/p>\n

Consider language learning again. When learning new words, in the beginning, I often found it valuable to use specialized tools such as spaced repetition systems or the keyword mnemonic. These make sense as being beginner mental strategies to the problem of new vocabulary.<\/p>\n

I hypothesize that my visual cortex would also light up as I used the keyword mnemonic to decode the translation of a word because of more-easily-remembered visual images. However, as I became more fluent using that word, I\u2019d stop using the mnemonic, the association would just be between the English word and it\u2019s translation. As I used it even more, that association would also be unnecessary, I would simply retrieve the foreign word directly when I need to use it.<\/p>\n

This suggests that the mental strategies to speak the language changed at least twice in my learning of the word. First using the mnemonic. Then using a remembered translation pair. Finally using the word directly. Each, probably involving less brain activation as more specialized circuits developed.<\/p>\n

Is Effective Learning Finding the Right Cascade of Strategies?<\/h2>\n

Could it be that effective learning is mostly about finding the right cascade of these mental strategies? Short-term, effortful strategies that can be employed quickly, slowly being replaced by less effortful but more slowly developed long-term strategies.<\/p>\n

Efficient learning would then try to find out where a gap persists\u2014i.e. when there isn\u2019t a good novice or intermediate mental strategy to get the right answer before the expert strategy can develop?<\/p>\n

This is all speculative, but I\u2019m sure thinking about learning strategies in terms of novice-to-expert functional reorganization will have a lot of influence on looking at ways to improve my learning strategies for future projects.<\/p>\n","protected":false},"excerpt":{"rendered":"

How does the brain rewire itself as you learn things? Recently, I came across some interesting research that used fMRI to visualize how the brain changes as you learn something new. The first interesting tidbit is that brain activation goes down as you learn. The better a subject got at a skill, the less of […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[682],"tags":[],"class_list":{"0":"post-6772","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-nc-learning","7":"entry"},"acf":[],"yoast_head":"\nHow the Brain Changes with Expertise - Scott H Young<\/title>\n<meta name=\"description\" content=\"Is learning mostly about finding the right mental strategies? 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