シャドーイング練習: The power of the placebo effect - Emma Bryce - YouTubeで英語スピーキングを学ぶ
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In 1996, 56 volunteers took part in a study to test a new painkiller called Trivaricaine.
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In 1996, 56 volunteers took part in a study to test a new painkiller called Trivaricaine.
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On each subject, one index finger was covered in the new painkiller while the other remained untouched.
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Then, both were squeezed in painful clamps.
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The subjects reported that the treated finger hurt less than the untreated one.
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This shouldn't be surprising, except Trivaricaine wasn't actually a painkiller, just a fake concotion with no pain-easing properties at all.
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What made the students so sure this dummy drug had worked?
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The answer lies in the placebo effect, an unexplained phenomenon wherein drugs, treatments, and therapies that aren't supposed to have an effect, and are often fake, miraculously make people feel better.
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Doctors have used the term placebo since the 1700s when they realized the power of fake drugs to improve people's symptoms.
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These were administered when proper drugs weren't available, or if someone imagined they were ill.
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In fact, the word placebo means "I shall please" in Latin, hinting at a history of placating troubled patients.
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Placebos had to mimic the real treatments in order to be convincing, so they took the form of sugar pills, water-filled injections, and even sham surgeries.
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Soon, doctors realized that duping people in this way had another use: in clinical trials.
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By the 1950s, researchers were using placebos as a standard tool to test new treatments.
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To evaluate a new drug, for instance, half the patients in a trial might receive the real pill.
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The other half would get a placebo that looked the same.
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Since patients wouldn't know whether they'd received the real thing or a dud, the results wouldn't be biased, researchers believed.
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Then, if the new drug showed a significant benefit compared to the placebo, it was proved effective.
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Nowadays, it's less common to use placebos this way because of ethical concerns.
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If it's possible to compare a new drug against an older version, or another existing drug, that's preferable to simply giving someone no treatment at all, especially if they have a serious ailment.
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In these cases, placebos are often used as a control to fine-tune the trial so that the effects of the new versus the old or alternative drug can be precisely compared.
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But of course, we know the placebos exert their own influence, too.
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Thanks to the placebo effect, patients have experienced relief from a range of ailments, including heart problems, asthma, and severe pain, even though all they'd received was a fake drug or sham surgery.
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We're still trying to understand how.
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Some believe that instead of being real, the placebo effect is merely confused with other factors, like patients trying to please doctors by falsely reporting improvements.
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On the other hand, researchers think that if a person believes a fake treatment is real, their expectations of recovery actually do trigger physiological factors that improve their symptoms.
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Placebos seem to be capable of causing measurable change in blood pressure, heart rate, and the release of pain-reducing chemicals, like endorphins.
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That explains why subjects in pain studies often say placebos ease their discomfort.
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Placebos may even reduce levels of stress hormones, like adrenaline, which can slow the harmful effects of an ailment.
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So shouldn't we celebrate the placebo's bizarre benefits?
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Not necessarily.
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If somebody believes a fake treatment has cured them, they may miss out on drugs or therapies that are proven to work.
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Plus, the positive effects may fade over time, and often do.
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Placebos also cloud clinical results, making scientists even more motivated to discover how they wield such power over us.
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Despite everything we know about the human body, there are still some strange and enduring mysteries, like the placebo effect.
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So what other undiscovered marvels might we contain?
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It's easy to investigate the world around us and forget that one of its most fascinating subjects lies right behind our eyes.
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このレッスンについて
このレッスンでは、プラセボ効果に関する興味深い話を通じて、英語スピーキング能力を向上させる練習を行います。具体的には、プラセボがどのように機能するのか、その歴史や医学的な影響について学びながら、リスニングと発音のスキルを強化します。英語の発音に慣れるための効果的なシャドーイングの実践を通して、より自然に英語を話す力を養いましょう。
重要な語彙とフレーズ
- プラセボ効果 - 効果がないはずの治療法が、実際に患者の症状を改善する現象。
- 偽薬 - 実際の効果がない治療薬。
- 臨床試験 - 新しい治療法の効果を評価するための実験。
- 生理的要因 - 体内で起こる生理的な変化。
- 期待感 - 何かがうまくいくと思う心の状態。
- 疼痛緩和 - 痛みを和らげること。
- 心拍数 - 心臓が一定の時間内に打つ回数。
- ストレスホルモン - ストレスによって分泌されるホルモン。
練習のコツ
YouTubeで英語学習を行う際、シャドーイングは非常に効果的です。このビデオのスピードとトーンに合わせて、shadowspeakを実践してみましょう。動画を再生しながら、話者の後に続いて声を出すことで、発音とリズムに慣れていきます。
特に、このビデオでは感情や強調された言葉が多く使われていますので、声の抑揚にも注意を払いましょう。shadow speechのテクニックを活用して、話者のトーンを模倣することで、より自然に英語を話すことができるようになります。まずはゆっくりと再生し、徐々に速度を上げながら練習しましょう。また、気になるフレーズは繰り返し練習することで、より深く理解できるようになります。
このようにして、英語のスピーキング能力を向上させることができると同時に、プラセボ効果についての知識も深められます！さあ、あなたも今日から実践してみましょう！
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。