シャドーイング練習: Dolphin Intelligence: IELTS LISTENING Vol 7 Test 1 Section 4 (IELTS Listening Recent Actual Test) - YouTubeで英語スピーキングを学ぶ
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Part 4 You will hear part of a biology lecture about dolphins and how views divide over their level of intelligence.
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Part 4 You will hear part of a biology lecture about dolphins and how views divide over their level of intelligence.
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First, you have some time to look at questions 31 to 40.
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Thank you.
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Now listen carefully and answer questions 31 to 40.
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In today's lecture, we'll dive into the topic of dolphin intelligence,
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discussing dolphin behavior and their physical structure,
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in an attempt to shed light on the question, how intelligent are dolphins?
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Well, concerning body size, dolphin brains are among the largest in the animal kingdom,
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more extensive than chimpanzees.
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And certain species, like bottlenose dolphins,
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have brains even bigger than humans.
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However, some current tests suggest that they do not possess the same cognitive abilities as humans,
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despite having a similar brain size.
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For instance, dolphins are often trapped in gill nets,
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originally intended for tuna fishing.
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These entanglement cases have led to unnecessary injury or deaths of dolphins,
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gradually depleting their numbers.
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Clearly, dolphins don't realize that they could just jump over these vertical barriers and swim to safety.
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People often mistakenly view dolphins' eternal smile as signs of intelligence and joy.
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Actually, this is not a facial expression at all,
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but a fixed design of their head.
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Unlike human beings with greater than 40 facial muscles,
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dolphins have no such powers with which to form an expression.
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On the other hand, small-brained animals are sometimes underrated for their level of intelligence.
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Pigeons and rats are typical examples of small-brained animals,
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which can perform tasks so complex that most humans would have trouble with them.
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Over the last few decades,
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scientists have conducted countless studies on the cognitive abilities of these overlooked animals,
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with quite surprising results.
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Pigeons are aware of their bodies when they see their reflections in the mirror.
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Pigeons are also trained under specific conditions and gradually form instinctive reactions.
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In an experiment in 2009,
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a group of 12 pigeons was given a reward,
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like food and water, every time they pecked a key on a lab table.
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All birds successfully performed the trick.
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These test results indicate that brain size is probably not the sole factor in determining intelligence.
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Another argument steers the attention,
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to the correlation between intelligence
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and the constituents of brains rather than their sheer sizes it's been found
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that dolphin brains are comprised chiefly of fatty cells
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which serve as a protective barrier between the systemic blood
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and the extracellular environment of the central nervous system they are also essential components of nerve cell membranes,
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affecting problem-solving skills performance.
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Now, the second mainstream view,
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is that dolphins are highly intelligent.
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Research into the behavior of dolphins in the wild,
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and in captivity, has yielded incredible data,
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on the intelligence of these marine mammals.
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Studies show that dolphins not only have the ability to learn as individuals,
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but those individuals can then pass their new knowledge on to others.
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Let's take a look at some typical examples.
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Among these are tested with Billy,
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a dolphin trapped in a sea lock and rescued.
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Billy spent three weeks in rehabilitation and was released back into the wild.
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There, researchers noticed that Billy had started tailwalking,
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a skill only mastered by captive dolphins who imitated the keepers.
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Billy had not been trained to tailwalk,
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but had learned the skill simply by observing other dolphins in the rehab center.
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Another study involves a female dolphin named Karen.
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Karen was given a test,
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in which she was rewarded with a fish,
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for every piece of litter she brought to researchers.
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To maximize its bounty, she quickly learned to take a newspaper,
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keep it at the bottom of a tank,
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and tear off smaller pieces to get more fish.
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Over the past hundred years,
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researchers have proven that dolphins are extremely social species,
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and have evolved to have highly developed brains.
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These factors are the most significant contributors to their intelligence,
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and become the means of survival for dolphins.
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In 2008, researchers tracked a group of around 400 dolphins.
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One female dolphin in the group was having a lot of trouble swimming,
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and kept flipping upside down,
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or sinking into the water.
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The other dolphins crowded around it.
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They paddled side by side with the injured female on their backs.
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By keeping the wounded female above water,
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they may have helped it to breathe, avoiding drowning.
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So how do they communicate with each other?
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Well, scientists have discovered, through observation and meticulous testing,
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that every dolphin has a different sound,
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resembling the whistle that other dolphins recognize as a particular individual.
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Dolphins can emit a wide variety of sounds.
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The frequency levels range ten times beyond what humans can hear.
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But of course, there are other means of communication for dolphins, besides sound.
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During mating season, male dolphins stroke females with flippers,
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after a fight to affirm social bonds.
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That is the end of part four.
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You now have one minute to check your answers to part four.
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Thank you.
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このレッスンについて
このレッスンでは、イルカの知性に関する生物学の講義を通じて、英語のリスニング力とスピーキング力を向上させます。特に、イルカの行動や脳の構造について学び、彼らの知性に関する様々な見解を探ります。このプロセスを通じて、聴き取った内容を自分の言葉で再現することで、英語スピーキング練習が効果的に行えます。
キーワードとフレーズ
- イルカの知性（Dolphin Intelligence）
- 脳のサイズ（Brain Size）
- 認知能力（Cognitive Abilities）
- 固定されたデザイン（Fixed Design）
- 複雑なタスク（Complex Tasks）
- 知識を伝える（Pass Knowledge）
- 自然界（Wild）
- 捕獲（Entanglement）
練習のコツ
このビデオのスピードとトーンに合わせて、shadowspeakを使用して効果的に練習しましょう。特に、講義の速度は自然であり、時折専門用語が含まれますので、最初はゆっくりとしたペースで進めることをおすすめします。以下のステップで練習を行ってください。
- 最初に聴き取る内容を何回か確認し、内容を理解します。
- 次に、音声を一時停止しながら、各フレーズや文を口に出して繰り返します。
- shadow speechの技術を活用し、ナレーターの音声に合わせて声を出すことで、発音やイントネーションを自然に身につけましょう。
- 特に、専門用語や動詞の使い方を意識し、言語の実際の使用に慣れるようにします。
- 最後に、録音機能を使って自分の声を録音し、ナレーターの発声と比較してみてください。
この練習方法を通じて、英語スピーキングがより自信のあるものになるとともに、shadowspeaksの技術を活用して、言語の流暢さを向上させることができます。
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。