シャドーイング練習: How Habits Can Change Your Life (and Your Brain) - 動画で英語スピーキングを学ぶ
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Hey smart people, Joe here.
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What if I told you that the reason you had minty-fresh breath this morning was because 100 years ago an advertiser named Claude C. Hopkins was having trouble selling a brand of toothpaste?
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He needed to convince people that brushing their teeth should be a daily routine, and back then, it wasn’t for most people.
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In the end he was able to get half the American public to pick up a new behavior and repeat it every single day, and pay money for his toothpaste.
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How did he do it?
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By tapping into neuroscience and decoding the awesome power of habits.
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Habits.
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We’ve all got ‘em.
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You can probably think of a few of your own.
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I always seem to tap my feet when I’m trying to sit still.
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And I find myself biting my nails whenever I’m focused on reading or watching a movie.
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I don’t consciously think about doing these things.
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That’s because I’ve done them so often that they’ve become a habit.
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We know habits as things we do automatically; tasks we do subconsciously, like walking or high fiving.
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And there’s a ton of things that technically count as habits, and they can be good or bad.
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So why do we form habits?
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And how do we learn new ones, or un-learn old ones?
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If you've ever taken the same path to school or work, then you likely have that pathway burned into your brain.
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You can probably walk it without really paying attention.
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Habits are built in a similar way.
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New neural pathways are formed when you repeat a behavior.
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And the more a brain circuit fires, the easier it becomes for our brain to do whatever that circuit controls, without conscious thought.
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Think back to how you learned to ride a bike.
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At first, riding a bike is tough.
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You’ve got to learn how to pedal and balance and turn all at the same time.
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You have to consciously think about each action.
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This happens in an area of your brain called the prefrontal cortex, the part associated with complex thought.
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But eventually, after you ride enough, you no longer have to consciously think about each individual action.
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Riding a bike has become a habit, and now it’s controlled by different parts of your brain.
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One area involved in habitual behavior is the striatum, which actually releases chemicals that inhibit the complex thinking part of your brain for that task.
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This is your brain being efficient.
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By turning down your brain’s thinking requirements for bike riding, it’s free to think other things, like ‘how exactly do igloos keep you warm?” Let’s go back to Claude Hopkins and his toothpaste scheme.
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Claude realized habits have three key ingredients.
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A cue, a behavior, and a reward.
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A cue is something that triggers a behavior, like how the alarm clock triggers you punching the snooze button, and this is followed by the reward - 9 sweet extra minutes of sleeping in.
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Claude got people thinking about that slimy film on your teeth in the morning, thanks to bacteria that colonize your mouth overnight.
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The sticky film is the cue that triggers brushing behavior.
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What was the reward?
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Claude convinced people this film would make their smile look ugly and a prettier smile was the reward for brushing.
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Claude understood that with the right cue and the right reward, you could entice people to do just about whatever behavior you wanted.
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But what he didn’t know was that rewarding a behavior can actually create a craving, and this is what makes habits so strong.
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Scientists now know that special neurons in the brain can fire and give us chemical rewards.
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But what’s weird is that once a habit and a reward are tied together in our brain, those reward neurons start firing even before you do the behavior.
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This is what causes craving, and it’s why you want popcorn when you go to the movies, why you pick up your bad habits when you see other people doing them, and why habits are so hard to break.
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Claude knew a prettier smile would be a reward that would make people brush, but he didn’t anticipate that over time people would subconsciously start craving the minty tingle that Pepsodent left in their mouths.
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People’s brains actually started to crave toothbrushing.
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So how can you train yourself to pick up a new habit, like eating an apple a day.
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And if you’ve got a bad habit, can you break it, or are you stuck with it forever?
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Scientists used to think that our brains didn’t change all that much once we reached adulthood, like concrete once it’s solidified.
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But it turns out your brain is much more like clay - it’s a super flexible organ.
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The chemistry of your brain is constantly changing as you go about your day, in response to everything from learning to moving to hunger.
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These chemical releases are short lived, but over time, if the same behaviors are repeated, the physical structure of the brain is actually changed.
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You create new neural pathways.
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And because the neural network has changed, so does the way the information flows.
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When a behavior is repeated often enough, a habit is formed.
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There’s a famous idea that a new skill is learned by putting in 10,000 hours of work, but it’s not that simple.
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The amount of time differs hugely between tasks and between people.
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What’s for sure is that when it comes to making a habit, whether it’s learning guitar or meditation, there’s simply no substitute for repetition.
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The reason bad habits are so hard to break is because you have literally woven new neural networks into your brain.
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That doesn’t go away overnight.
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So give yourself a break.
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And if you’re trying to change a habit, know that it’s usually best to try and replace bad behavior with a new behavior instead of just trying to erase the pattern altogether.
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The good thing is that now you know you have the power to change your brain.
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It’s as easy as brushing your teeth.
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And if you haven’t already made it a habit – Stay Curious.
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文脈と背景
この動画では、ジョーが私たちの習慣がいかに私たちの生活や脳に影響を与えるかについて話しています。彼は、100年前に広告業者クラウド・C・ホプキンズが、歯磨きが日常的なルーチンであるべきだと人々を説得するためにどのように行動したかを例に挙げています。習慣が形成される仕組みや、どのように新しい習慣を学び、古い習慣を忘れることができるのかに焦点を当てています。このような内容は、習慣を理解し、自分も英語の習慣を形成する助けになります。
日常的なコミュニケーションのための5つのフレーズ
- 「習慣は自動的に行うことです。」 - 英語での思考を促進します。
- 「脳内の経路が形成されます。」 - 学習プロセスを理解する手助けになります。
- 「新しい習慣を形成するためには、刺激、行動、報酬が必要です。」 - 効果的な強化を理解する助けになります。
- 「習慣を変えることは難しいですが、可能です。」 - 前向きな考え方を促します。
- 「繰り返しが鍵です。」 - 英語学習における反復の重要性を示しています。
段階的シャドーイングガイド
この動画の内容を理解し、英語力を向上させるために、以下のステップバイステップの方法でシャドースピーチ（shadow speech）を実践してみましょう。
- 初見の視聴: 動画を最初から最後まで視聴し、全体の内容を把握します。
- フレーズのリスニング: 上記の5つのフレーズを重点的に聞き取り、意味を確認します。
- 音声を真似る: フレーズごとに一時停止し、英語の発音やリズムを真似てみましょう。この際、英語シャドーイングのテクニックを活用してください。
- 反復練習: 何度も繰り返し発音し、自分の声を録音して聴き直すことで、改善点を見つけます。
- 具体的な文脈で使用: トピックに関連する会話やディスカッションで、学んだフレーズを使える状況を作り出します。自信を持って、他の人と英語で話すことを心がけましょう。
このプロセスを通じて、shadowspeakやYouTubeで英語学習のスキルを向上させることができ、自信を持って英語を話す力を養えます。
この動画の文法
話し手がよく使っている文型を、動画の実際の表現とともに紹介します。
| 文型 | 動画での表現 |
|---|---|
| 受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる | are built · are formed · is followed |
| 現在完了形 have/has + 過去分詞 — 過去の出来事が今も関係している | I've done · you've ever taken · has become |
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。