シャドーイング練習: Core Knowledge (Stanford Psych 60) - 動画で英語スピーキングを学ぶ
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Hi, my name is Kara Wiseman.
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I'm a PhD student in developmental psychology at Stanford.
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I study social cognitive development, focusing on how young children and adults think about concepts like consciousness, sentience, and personhood.
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Today, I'm going to be talking to you about a very influential idea in developmental psychology, that babies are born with what researchers call core knowledge.
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Some researchers think that infants mostly rely on all -purpose mechanisms for learning about the world.
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These mechanisms are domain general, meaning that they can be applied to everything from learning about the physical world,
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to understanding numbers, to figuring out social relationships.
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Other researchers think that infants are born with more domain -specific ways of making sense of their experiences.
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They think that infants are born with a handful of distinct cognitive systems for reasoning about different parts of the world.
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This perspective is called the theory of core knowledge.
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On this theory, the human mind contains a few, maybe five or six, core knowledge systems,
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and each one is responsible for dealing with just a small chunk of the world.
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Here's one well -studied example of a core knowledge system, the core object system.
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The core object system supports reasoning about objects, like rocks or strawberries or basketballs, and the laws of physics that govern them.
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This system, like other core knowledge systems, is characterized by a handful of key principles, specific pieces of knowledge that guide reasoning in this domain.
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In the core object system, one of these key principles is the principle of cohesion.
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Objects should hold together across time and space, rather than disintegrating.
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Objects should also obey the principle of continuity, that is, they should move along continuous paths through time and space,
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rather than appearing and disappearing at random.
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Finally, there's the principle of contact.
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Objects should only start to move when something else touches them, and not without being touched.
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The reason these three key principles, cohesion, continuity, and contact,
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are said to characterize the core object system is
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because studies have shown that infants expect objects to behave according to these principles and are surprised when objects violate them.
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Another important part of the core object system and other core knowledge systems is that it is characterized by signature limits,
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situations in which the system falls apart.
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Studies with both young infants and adults have demonstrated
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that the core object system can keep track of about three to four of these objects at a time, but not more.
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And it doesn't do well with things like piles of sand, liquids, or other substances, which violate the key principle of cohesion.
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This can lead to some pretty funny experimental findings, like young infants seeming not to notice when a single pile of sand goes behind a curtain,
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and then have somehow turned into two separate piles of sand when the curtain is raised.
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So far, research indicates that there are about five or six of these core knowledge systems,
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each of which has its own set of key principles and signature limits.
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The core object system is one of the best studied, but there is also extensive research on a core number system,
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supporting reasoning about quantity and keeping track of how many things there are in some context.
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A core agent system, supporting reasoning about creatures that act autonomously to pursue their goals,
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a core place system, supporting navigation around an environment, and a core system for shape or form, supporting representation of the shapes of objects.
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Recently, some researchers have also speculated about a core knowledge system for social partners, supporting reasoning about social interactions and relationships.
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This is still an active area of research.
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Core knowledge theorists argue that these core systems are innate, present at birth rather than learned over time,
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and that the systems are shared across many species, rather than being unique to humans.
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Researchers have converged on these conclusions from a few different angles.
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Many researchers conduct studies with humans of different ages, including research with newborn infants, with older infants as they gain more experience and skills,
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with toddlers as they become fluent speakers of their language.
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with school children, as they are explicitly instructed in arithmetic, geometry, manners, and other subjects, and with adults.
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Another research approach has been to compare performance across species, including not only humans, but also non -human primates,
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newly hatched chicks, zebrafish, and even ants.
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Finally, researchers sometimes compare performance across different cultural contexts that vary in the languages people use, the everyday environments that people experience,
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and the values and beliefs that people hold.
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For example, lots of research has compared people living in highly industrialized urban centers like
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San Francisco or Beijing to people living in isolated indigenous communities in rural Papua New Guinea or the Amazonian rainforest.
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Across many of these studies, participants of different ages, species,
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and cultural contexts have all shown similar sensitivities to the key principles and signature limits of each of the core knowledge systems,
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leading some researchers to argue that these systems are likely to be innate and species general.
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Other researchers disagree.
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It's important to note that the theory of core knowledge does not claim to explain all of human cognition.
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Core knowledge theorists would not claim
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that there are an infinite number of core knowledge systems for all the different chunks of the world
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we might reason about or interact with, or that there are core knowledge systems for things like computers or astrophysics,
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which have no plausible role in evolutionary history.
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Instead, researchers in this tradition view the small handful of core knowledge systems as fundamental building blocks that, over the course of learning and development,
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combine to help us reason about more and more complex concepts like computers, astrophysics, and minds.
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For more on the topic of core knowledge, check out these papers.
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Thank you.
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このレッスンの語彙とスピーキングのポイント
このスピーキングレッスンは、動画「Core Knowledge」を教材にしています。 繰り返し出てくる語は次のとおりです：core, knowledge, object, principle, researchers。 この動画には、シャドーイング用の文が35文、単語が982語あります。 音声の長さは7:02です。 話す速さは1分あたり約140語で安定しており、シャドーイングしやすいペースです。 英語の頻出3,000語に含まれる単語は79%だけなので、語彙は難しめです。
この動画の重要語彙
動画に出てくる覚えておきたい単語15語を、発音と意味つきで紹介します。
| 単語 | 発音 | 意味 |
|---|---|---|
| principle 名詞 | /ˈpɹɪn.sɪ.pəl/ | 原理, 原則 |
| researcher 名詞 | /ˈɹiˌsɝ.t͡ʃɚ/ | 研究員, 研究者 |
| compare 動詞 | /kəmˈpɛɚ/ | 比べる, 比較する |
| sand 名詞 | /sænd/ | 砂 |
| signature 名詞 | /ˈsɪɡ.nə.t͡ʃə/ | 署名, サイン |
| pile 名詞 | /paɪl/ | 積み重ね, 山 |
| handful 名詞 | /ˈhæn(d)fʊl/ | 少数 |
| argue 動詞 | /ˈɑɹ.ɡju/ | 議論する, 論ずる |
| psychology 名詞 | /saɪˈkɑ.lə.d͡ʒi/ | 心理学, サイコロジー |
| mechanism 名詞 | /ˈmɛk.ə.nɪ.zəm/ | 仕組み, 機構 |
| curtain 名詞 | /ˈkɜɹt(ə)n/ | カーテン |
| violate 動詞 | /ˈvaɪəˌleɪt/ | 破る, 違う |
| chunk 名詞 | /t͡ʃʌŋk/ | 塊 |
| topic 名詞 | /ˈtɑpɪk/ | 話題, テーマ |
| belief 名詞 | /bɪˈliːf/ | 確信 |
動画に出てくる句動詞
| 単語 | 意味 |
|---|---|
| check out 動詞 | 試験する, 検査する |
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 born · can be applied · is called |
| 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 | have shown · have demonstrated · have also speculated |
注意したい発音
話し手はI'm, doesn'tなど、短縮形や弱形を3回使っています。聞こえたとおりの短い形で発音しましょう。
- 「th」の音: theorist /ˈθiːəɹəst/, arithmetic /æɹɪθˈmɛtɪk/
- 「sh」と「zh」の音: conclusion /kənˈkluːʒən/, representation /ˌɹɛp.ɹə.zɛnˈteɪ.ʃən/, interaction /ˌɪn.təˈɹæk.ʃən/, consciousness /ˈkɑnʃəsnəs/, influential /ɪnflʊˈɛnʃəl/
- 長い単語（アクセントの位置に注意）: psychology /saɪˈkɑ.lə.d͡ʒi/, mechanism /ˈmɛk.ə.nɪ.zəm/, developmental /dɪˌvɛləpˈmɛntəl/, continuity /ˌkɑn.tɪˈn(j)u.ə.ti/, representation /ˌɹɛp.ɹə.zɛnˈteɪ.ʃən/
日本語話者が苦手な音：
- /r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: principle /ˈpɹɪn.sɪ.pəl/, rely /ɹɪˈlaɪ/, experimental /ɪkspɛɹəˈmɛntəl/, evolutionary /ˌiː.vəˈluː.ʃən.ɛɹ.i/, industrialize /ɪnˈdʌstɹiəlaɪz/
- /v/ — /b/ にならないように、上の歯を下唇に当てる: cognitive /ˈkɑɡ.nɪ.tɪv/, developmental /dɪˌvɛləpˈmɛntəl/, violate /ˈvaɪəˌleɪt/, everyday /ˈɛvɹiˌdeɪ/, vary /ˈvɛəɹi/
- /f/ — 「フ」ではなく、上の歯と下唇で出す: handful /ˈhæn(d)fʊl/, belief /bɪˈliːf/, physics /ˈfɪz.ɪks/, fundamental /ˌfʌn.dəˈmɛn.təl/, infinite /ˈɪnfɪnɪt/
この動画での練習方法
- まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
- 通常の速度で一文ずつシャドーイングし、話し手のリズムに合うまで繰り返します。
- 自分の声を録音して元の音声と比べます。principle, researcher, compareなどの単語に特に注意しましょう。
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。