シャドーイング練習: A Simple Way to Break a Bad Habit | Judson Brewer | TED - YouTubeで英語スピーキングを学ぶ
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When I was first learning to meditate, the instruction was to simply pay attention to my breath, and when my mind wandered, to bring it back.
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When I was first learning to meditate, the instruction was to simply pay attention to my breath, and when my mind wandered, to bring it back.
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Sounded simple enough.
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Yet I'd sit on these silent retreats, sweating through T-shirts in the middle of winter.
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I'd take naps every chance I got because it was really hard work.
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Actually, it was exhausting.
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The instruction was simple enough but I was missing something really important.
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So why is it so hard to pay attention?
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Well, studies show that even when we're really trying to pay attention to something -- like maybe this talk -- at some point, about half of us will drift off into a daydream, or have this urge to check our Twitter feed.
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So what's going on here?
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It turns out that we're fighting one of the most evolutionarily-conserved learning processes currently known in science, one that's conserved back to the most basic nervous systems known to man.
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This reward-based learning process is called positive and negative reinforcement, and basically goes like this.
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We see some food that looks good, our brain says, "Calories! ... Survival!" We eat the food, we taste it -- it tastes good.
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And especially with sugar, our bodies send a signal to our brain that says, "Remember what you're eating and where you found it." We lay down this context-dependent memory and learn to repeat the process next time.
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See food, eat food, feel good, repeat.
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Trigger, behavior, reward.
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Simple, right?
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Well, after a while, our creative brains say, "You know what?
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You can use this for more than just remembering where food is.
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You know, next time you feel bad, why don't you try eating something good so you'll feel better?" We thank our brains for the great idea, try this and quickly learn that if we eat chocolate or ice cream when we're mad or sad, we feel better.
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Same process, just a different trigger.
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Instead of this hunger signal coming from our stomach, this emotional signal -- feeling sad -- triggers that urge to eat.
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Maybe in our teenage years, we were a nerd at school, and we see those rebel kids outside smoking and we think, "Hey, I want to be cool." So we start smoking.
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The Marlboro Man wasn't a dork, and that was no accident.
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See cool, smoke to be cool, feel good. Repeat.
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Trigger, behavior, reward.
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And each time we do this, we learn to repeat the process and it becomes a habit.
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So later, feeling stressed out triggers that urge to smoke a cigarette or to eat something sweet.
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Now, with these same brain processes, we've gone from learning to survive to literally killing ourselves with these habits.
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Obesity and smoking are among the leading preventable causes of morbidity and mortality in the world.
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So back to my breath.
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What if instead of fighting our brains, or trying to force ourselves to pay attention, we instead tapped into this natural, reward-based learning process ...
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but added a twist?
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What if instead we just got really curious about what was happening in our momentary experience?
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I'll give you an example.
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In my lab, we studied whether mindfulness training could help people quit smoking.
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Now, just like trying to force myself to pay attention to my breath, they could try to force themselves to quit smoking.
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And the majority of them had tried this before and failed -- on average, six times.
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Now, with mindfulness training, we dropped the bit about forcing and instead focused on being curious.
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In fact, we even told them to smoke.
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What? Yeah, we said, "Go ahead and smoke, just be really curious about what it's like when you do." And what did they notice?
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Well here's an example from one of our smokers.
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She said, "Mindful smoking: smells like stinky cheese and tastes like chemicals, YUCK!" Now, she knew, cognitively that smoking was bad for her, that's why she joined our program.
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What she discovered just by being curiously aware when she smoked was that smoking tastes like shit.
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(Laughter) Now, she moved from knowledge to wisdom.
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She moved from knowing in her head that smoking was bad for her to knowing it in her bones, and the spell of smoking was broken.
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She started to become disenchanted with her behavior.
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Now, the prefrontal cortex, that youngest part of our brain from an evolutionary perspective, it understands on an intellectual level that we shouldn't smoke.
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And it tries its hardest to help us change our behavior, to help us stop smoking, to help us stop eating that second, that third, that fourth cookie.
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We call this cognitive control.
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We're using cognition to control our behavior.
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Unfortunately, this is also the first part of our brain that goes offline when we get stressed out, which isn't that helpful.
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Now, we can all relate to this in our own experience.
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We're much more likely to do things like yell at our spouse or kids when we're stressed out or tired, even though we know it's not going to be helpful.
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We just can't help ourselves.
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When the prefrontal cortex goes offline, we fall back into our old habits, which is why this disenchantment is so important.
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Seeing what we get from our habits helps us understand them at a deeper level -- to know it in our bones so we don't have to force ourselves to hold back or restrain ourselves from behavior.
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We're just less interested in doing it in the first place.
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And this is what mindfulness is all about: Seeing really clearly what we get when we get caught up in our behaviors, becoming disenchanted on a visceral level and from this disenchanted stance, naturally letting go.
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This isn't to say that, poof, magically we quit smoking.
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But over time, as we learn to see more and more clearly the results of our actions, we let go of old habits and form new ones.
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The paradox here is that mindfulness is just about being really interested in getting close and personal with what's actually happening in our bodies and minds from moment to moment.
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This willingness to turn toward our experience rather than trying to make unpleasant cravings go away as quickly as possible.
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And this willingness to turn toward our experience is supported by curiosity, which is naturally rewarding.
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What does curiosity feel like?
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It feels good.
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And what happens when we get curious?
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We start to notice that cravings are simply made up of body sensations -- oh, there's tightness, there's tension, there's restlessness -- and that these body sensations come and go.
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These are bite-size pieces of experiences that we can manage from moment to moment rather than getting clobbered by this huge, scary craving that we choke on.
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In other words, when we get curious, we step out of our old, fear-based, reactive habit patterns, and we step into being.
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We become this inner scientist where we're eagerly awaiting that next data point.
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Now, this might sound too simplistic to affect behavior.
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But in one study, we found that mindfulness training was twice as good as gold standard therapy at helping people quit smoking.
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So it actually works.
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And when we studied the brains of experienced meditators, we found that parts of a neural network of self-referential processing called the default mode network were at play.
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Now, one current hypothesis is that a region of this network, called the posterior cingulate cortex, is activated not necessarily by craving itself but when we get caught up in it, when we get sucked in, and it takes us for a ride.
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In contrast, when we let go -- step out of the process just by being curiously aware of what's happening -- this same brain region quiets down.
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Now we're testing app and online-based mindfulness training programs that target these core mechanisms and, ironically, use the same technology that's driving us to distraction to help us step out of our unhealthy habit patterns of smoking, of stress eating and other addictive behaviors.
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Now, remember that bit about context-dependent memory?
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We can deliver these tools to peoples' fingertips in the contexts that matter most.
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So we can help them tap into their inherent capacity to be curiously aware right when that urge to smoke or stress eat or whatever arises.
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So if you don't smoke or stress eat, maybe the next time you feel this urge to check your email when you're bored, or you're trying to distract yourself from work, or maybe to compulsively respond to that text message when you're driving, see if you can tap into this natural capacity, just be curiously aware of what's happening in your body and mind in that moment.
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It will just be another chance to perpetuate one of our endless and exhaustive habit loops ...
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or step out of it.
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Instead of see text message, compulsively text back, feel a little bit better -- notice the urge, get curious, feel the joy of letting go and repeat.
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Thank you. (Applause)
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このレッスンについて
このレッスンでは、TEDスピーカーのジャドソン・ブリューワー氏が、なぜ悪い習慣を断ち切るのが難しいのか、そしてそれを克服するためのシンプルかつ効果的な方法について解説します。人間が持つ「トリガー、行動、報酬」という報酬ベースの学習プロセスが、いかに喫煙や過食などの習慣を形成するかを具体例で学びます。さらに、脳と戦うのではなく、マインドフルネスと「好奇心」を通じて習慣の呪縛を解き放つ方法を、喫煙者への研究事例を交えて紹介します。この動画は、習慣形成のメカニズムを理解し、自己改善に応用するヒントを得ながら、以下のような語学学習を進めることができます:
- 語彙トピック: 習慣 (habit)、報酬 (reward)、トリガー (trigger)、マインドフルネス (mindfulness) など、心理学や脳科学に関連する専門用語。
- 文法パターン: 原因と結果を説明する表現、具体例を挙げる構成、提案やアドバイスを行う際の助動詞の活用。
- スピーキングの文脈: 科学的・抽象的なアイデアを論理的に説明する練習。TEDトークのようなプレゼンテーションで、自身の経験や考察を効果的に伝えるスキルを養えます。
重要な語彙とフレーズ
- to pay attention to ~ (～に注意を払う、集中する)
例: "The instruction was to simply pay attention to my breath." (指示は単に自分の呼吸に注意を払うことでした。)
- to drift off into a daydream (空想にふける、ぼんやりする)
例: "about half of us will drift off into a daydream" (私たちの約半数は空想にふけってしまいます。)
- evolutionarily-conserved learning process (進化的に保存された学習プロセス)
人間が共通して持つ、進化の過程で守られてきた学習の仕組み。
- trigger, behavior, reward (引き金、行動、報酬)
習慣形成の核となる３つの要素。引き金によって行動が誘発され、報酬が得られることでその行動が強化されます。
- to tap into ~ (～を活用する、～を利用する)
例: "we instead tapped into this natural, reward-based learning process" (私たちは代わりにこの自然な、報酬ベースの学習プロセスを利用しました。)
- to get curious about ~ (～について好奇心を持つ)
例: "we just got really curious about what was happening in our momentary experience?" (私たちはただ、その瞬間の経験で何が起こっているのかに本当に好奇心を持つだけでした。)
- to move from knowledge to wisdom (知識から知恵へと移行する)
単なる情報としての知識から、経験を通じて得られる深い洞察としての知恵に変わること。
この動画の練習のコツ
このTEDトークは、英語スピーキング練習と発音練習に非常に適しています。特に、複雑な概念を明確に説明するスキルを向上させたい方におすすめです。
- 話速とアクセント: スピーカーの話速は中程度で明瞭です。アメリカ英語の標準的なアクセントで話されているため、シャドーイングの練習に最適です。専門用語もはっきりと発音されており、正確な発音を学ぶ良い機会となります。
- トピックの難易度: 心理学や脳科学の学術的な内容ですが、スピーカーは分かりやすい言葉で解説しています。最初は内容理解に集中し、次に単語の発音や文のリズム、イントネーションを真似る練習を重ねましょう。
- IELTS対策にも: このような学術的・科学的なテーマは、IELTS対策のリーディングやリスニングセクションで頻出します。関連語彙や表現を習得することで、試験対策にも繋がります。また、複雑なアイデアを要約し、自分の意見を述べる英語の流暢さを高める実践的な練習にもなります。
- 効果的なシャドーイング:
- 内容を理解後、トランスクリプトを読みながら話者のポーズや強調を意識して音読。
- 次に、トランスクリプトを見ずに、話者の少し後を追うように声に出して真似します。
- 話者のイントネーション、リズム、感情の込め方まで真似ることで、より自然で表現豊かな英語スピーキング練習ができます。
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。
ShadowingEnglishでの効果的な学習方法
- 動画を選ぶ: 自然で明瞭な英語が使われているYouTube動画を選びましょう。TED Talks、BBC News、映画のシーン、ポッドキャスト、IELTS模範解答などが最適です。URLをコピーして検索バーに貼り付けてください。短い動画（5分以内）や、自分が本当に興味を持てるテーマから始めるのがコツです。
- まず聞いて内容を理解する: 最初は1倍速でただ聞くだけにしましょう。まだ繰り返す必要はありません。文の意味を理解し、話者がどのように単語を強調し、音を繋げ、間を取っているかに注目してください。内容を把握してからシャドーイングに入ると、はるかに効果的です。
- シャドーイングモードを設定する:
- Wait Mode（待機モード）:
+3sまたは+5sを選ぶと、動画が一文を読み終えた後に自動で一時停止し、繰り返す時間が生まれます。完全に手動でコントロールしたい場合はManualを選んでNextを自分で押しましょう。 - Sub Sync（字幕同期）: YouTubeの字幕と音声がずれることがあります。
±100msで調整して、正確なタイミングで追えるようにしてください。
- Wait Mode（待機モード）:
- 声に出してシャドーイングする（最重要）: ここが練習の本質です。文が流れると同時に——または一時停止中に——はっきりと自信を持って声に出して繰り返しましょう。ただ単語を読むだけでなく、話者のリズム、強調、高低、連音をそっくりそのまま真似することが大切です。「影」のように話者に重なるのが理想。Repeat機能を使って同じ文を何度も繰り返し、自然に出てくるまで定着させましょう。
- 徐々に難易度を上げて続ける: 一つのパッセージに慣れたら、さらに挑戦してみましょう。速度を <code>1.25x</code> や <code>1.5x</code> に上げれば、高速の言語反射を鍛えられます。Wait Modeを <code>Off</code> にして連続シャドーイングするのが最も上級で効果的なモードです。毎日15〜30分継続すれば、数週間で目に見える変化を実感できます。