シャドーイング練習: The science of laughter - Sasha Winkler - YouTubeで英語スピーキングを学ぶ
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Isn't it odd that when something's funny,
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Isn't it odd that when something's funny,
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you might show your teeth,
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change your breathing, become weak and achy in some places,
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and maybe even cry?
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In other words, why do we do this bizarre thing that is laughter?
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When you laugh, your abdominal muscles contract rapidly.
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This alters your breathing patterns,
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increasing the pressure in your chest cavity and pushing air out,
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which might audibly emerge as a snort, wheeze, or vocalization.
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Because you're exerting your abdominal muscles much more than you usually would while talking,
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they may start to hurt.
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Laughter also inhibits your reflexes and muscle control,
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causing sensations like leg weakness.
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So where does this funny phenomenon come from?
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Because there's no archaeological record of laughter,
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it's impossible to say exactly how and why it evolved.
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But scientists have some theories.
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Importantly, humans are not the only animals today that do something like laughter.
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Using ultrasonic recorders, researchers in the late 90s realized that rats were basically giggling while being tickled.
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Scientists have since compiled evidence of at least 65 species,
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mostly mammals but also some birds,
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that vocalize during social play.
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Some, unsurprisingly, are our closest relatives.
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By recording and analyzing the sounds primates make while playing and being tickled,
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Researchers grew more convinced that the ancient ancestor of all great apes did something like laughter.
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And because other apes make laughter-like sounds during rough-and-tumble play,
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they think laughter may have originally developed to clearly signal friendly, non-aggressive intent.
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But of course, humans don't just laugh when we're wrestling,
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but also when we're amused and even surprised, confused, or nervous.
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Some scientists think laughter took on expanded functions after humans split from other great apes
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and developed large social groups and more complex language abilities.
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They hypothesized that laughter gradually became something we could use not just during play,
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but within speech to convey subtle meanings and a range of contexts to show our emotions.
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This is thought to be one of the reasons that laughter is contagious.
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It's like an invitation to share in someone's emotional state.
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Just hearing clips of laughter can activate key regions in your brain,
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triggering you to smile or laugh yourself.
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And when participants in one study watched a funny video,
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they laughed significantly longer and more often when another person was present,
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even though they reported feeling the same level of amusement.
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Human laughter is also generally louder than the play vocalizations of most animals.
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Some scientists speculate that this is because our laughter functions not only as a signal between individuals,
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but a broadcast to everyone around.
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Studies found that observers across the world and as young as five months old
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could reliably tell the difference between close friends and acquaintances just from brief clips of them laughing.
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Similarly, we can tell whether a laugh is real or fake based just on the sound.
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Fake or volitional laughter is produced in entirely different networks in the brain,
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relying on speech-like pathways.
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Meanwhile, spontaneous laughter arises from older networks that other animals also use for their vocalizations.
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And laughter's not just socially important.
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It's also thought to be good for us.
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When we laugh, our brains release feel-good neurotransmitters like endorphins and decrease levels of stress hormones like cortisol.
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Some research even suggests that people who laugh more can cope with stress more effectively and have better cardiovascular health.
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Laughter is a universal human behavior.
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Babies can laugh before they can speak.
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Whether it's the best medicine depends on your ailment.
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But as something that makes life more tolerable,
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strengthens bonds, and potentially improves aspects of your health,
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you can't go wrong with a good laugh.
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Unless you have a broken rib or something,
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then it's no laughing matter.
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Certainly nothing to crack up about.
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Laughter is an essential part of expressing ourselves.
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But what about more advanced means of communication?
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Students in over 130 countries are turning their ideas into TED-style talks with the TED-Ed Student Talks program.
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They're connecting with each other while honing their public speaking skills,
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and that's no laughing matter.
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Learn how to bring these free activities to a classroom or after-school program near you at ed.ted.com slash student talks.
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このレッスンについて
このレッスンでは、笑いの科学に関する魅力的な話題を通じて、英語のスピーキング能力を向上させます。特に、重要な単語やフレーズを学びながら、リスニングスキルと発音を鍛えることに焦点を当てます。このビデオを観ながら、ナレーターの言い回しやスピードに合わせて繰り返すことで、効果的にシャドーイング（shadowspeak）を実践できます。
キーワードとフレーズ
- laughter（笑い）
- abdominal muscles（腹筋）
- vocalize（声を出す）
- social play（社交的な遊び）
- contagious（伝染する）
- neurotransmitters（神経伝達物質）
- stress hormones（ストレスホルモン）
- acquaintances（知人）
練習のコツ
このビデオは、感情を込めたナレーションが特徴ですので、shadowspeakのテクニックを活用してリピート練習を行いましょう。まずはナレーションをじっくり聞き、全体の流れやリズムをつかんでください。その後、耳で聞いた内容を口に出して繰り返し、自分の声がナレーションと一致するように心掛けましょう。特に笑いに関連する部分では、ナレーションが自然に持つユーモアを意識して声のトーンや速度を調整すると良いです。
また、IELTS スピーキング対策として、実際の会話の中でどのように笑いを取り入れるのかを考えながら練習することも大切です。楽しみながら練習することで、自信を持って英語を話せるようになるでしょう。
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。