シャドーイング練習: 1 6 What Illusions Teach Us - 動画で英語スピーキングを学ぶ
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51 文
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Neuroscience has largely worked out the basic information processing steps that lead to the construction of our conscious experience of the world.
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Light reflects off of surfaces in the world.
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This reflected light passes through the cornea, pupil and lens before being detected by photoreceptors in the retina.
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Let's call the moment that light is detected by cells in the retina time zero.
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Our conscious experience of events in the world does not happen at time zero, but rather a quarter to a third of a second later.
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During that quarter to one third of a second, a tremendous amount of very complex unconscious
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and pre-conscious processing takes the two-dimensional pattern of pixel-like activations at
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the retina to a highly constructed three-dimensional conscious experience of objects and events occurring in the world.
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Some of the work in my lab has focused on the operations
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that happen in this quarter to one third of a second
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before we become conscious of what is apparently happening in the world.
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I have been especially interested in visual illusions
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because they are mistakes made by the constructive processes that go into the creation of our conscious visual experience.
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They are mistakes that can tell us useful information about the processes that go into the construction of our conscious experience.
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In the case of a visual illusion, we might see something that we know is not really there.
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It looks like something is there or is happening that we know cannot really be happening.
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Take this example of what is called apparent motion.
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In one frame, I show two dots, and in the next frame, I show two other dots.
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Even though there is no motion in this image sequence, your visual system creates a motion sequence.
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But this motion sequence is ambiguous.
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Some of you probably see vertical motion, and others see horizontal motion.
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Whatever you see, you can now force your visual system to construct the opposite motion.
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Let's say you're seeing horizontal motion now.
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To force your brain to see vertical motion, cover the right two jumping dots with your hand.
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Now, you'll see the remaining two dots go vertically.
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Now, when you take your hand away, you will continue to see the motion jump back and forth vertically.
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Likewise, if you want to force your visual system to see horizontal motion, cover the bottom two dots with your hand.
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Now the top two will jump back and forth, and when you remove your hand, the horizontal motion will continue.
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This apparent motion is, well, only apparent.
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It's not real.
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There's no net horizontal or vertical motion in the image, and none of the dots are actually moving at all.
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We are experiencing a motion consciously that does not exist.
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It is a construction of those processes that create our conscious experience.
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Apparent motion is a case where we see something that we know is not really out there in the world.
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There are other cases where we fail to see something that we know is, in fact, happening in the world.
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A beautiful example of this occurs in a phenomenon called motion-induced blindness.
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You can see that there are three yellow dots and a blinking fixation point.
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In addition, there's a rotating array of crosses.
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What you'll notice, if you carefully look at the blinking dot in the middle is
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that one or two or all three of the yellow dots will vanish from your consciousness.
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But if you make a sudden eye movement, poof, all three yellow dots appear again.
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So we have cases where we consciously experience something that we know is not really happening in reality,
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as when we see horizontal or vertical apparent motion in a sequence of static dots,
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And we also have cases where we fail to see something that we know is happening in reality.
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So what are we to take from all this?
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While it's safe to assume that there is a reality in itself, it might turn out to function in a radically different way
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than it seems to function to us given what we can glean from our flawed sensory constructions.
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Yet all we have are our senses
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and the constructions of our conscious experience to go on in deciphering what is happening in reality.
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Beyond these limitations, we can only try to do the best
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that we can in our efforts to figure out the nature of reality as it really is, beyond how it may seem to us.
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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C1レベルのスピーキングレッスンは、動画「1 6 What Illusions Teach Us」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：motion, dot, conscious, experience, happening。 この動画には、シャドーイング用の文が51文、単語が754語あります。 音声の長さは4:17です。 話す速さは1分あたり約176語で、日常会話に近い自然なペースです。 単語の82%は英語の頻出3,000語に含まれます。残りは練習の前に確認しておきましょう。
この動画の重要語彙
動画の中で特に難しい単語15語を、発音と意味つきで紹介します。
| 単語 | 発音 | 意味 |
|---|---|---|
| horizontal 形容詞 | /ˌhoɹəˈzɑn.təl/ | 水平な, 横の |
| retina 名詞 | /ˈɹɛt.ə.nə/ | 網膜 |
| blink 動詞 | /ˈblɪŋk/ | まばたきする, 瞬く |
| illusion 名詞 | /ɪˈl(j)uːʒ(ə)n/ | 幻想 |
| construct 動詞 | /ˈkɑn.stɹʌkt/ | 建設する, 建てる |
| dimensional 形容詞 | /daɪˈmɛn.ʃə.nəl/ | -次元の |
| detect 動詞 | /dɪˈtɛkt/ | 検出する, 見付ける |
| blindness 名詞 | /ˈblaɪndnəs/ | 盲目, 盲 |
| cornea 名詞 | /ˈkɔː(ɹ)ni.ə/ | 角膜 |
| decipher 動詞 | /dɪˈsaɪfə(ɹ)/ | 解読する |
| fixation 名詞 | /fɪksˈeɪʃən/ | 固定 |
| neuroscience 名詞 | 神経科学 | |
| vanish 動詞 | /ˈvænɪʃ/ | 消える |
| radically 副詞 | /ˈɹædɪkli/ | そもそも, 根本から |
| ambiguous 形容詞 | /æmˈbɪɡ.ju.əs/ | 曖昧な |
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 |
|---|---|
| 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 | has largely worked · has focused · have been |
| 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 | being detected · is detected · is called |
注意したい発音
話し手はyou'll, you're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。
- 「sh」と「zh」の音: illusion /ɪˈl(j)uːʒ(ə)n/, dimensional /daɪˈmɛn.ʃə.nəl/, fixation /fɪksˈeɪʃən/, vanish /ˈvænɪʃ/, limitation /lɪmɪˈteɪʃən/
- 長い単語（アクセントの位置に注意）: horizontal /ˌhoɹəˈzɑn.təl/, vertically /ˈvɝ.tɪ.kəli/, dimensional /daɪˈmɛn.ʃə.nəl/, ambiguous /æmˈbɪɡ.ju.əs/, limitation /lɪmɪˈteɪʃən/
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: horizontal /ˌhoɹəˈzɑn.təl/, radically /ˈɹædɪkli/
- /v/ — /b/ にならないように、上の歯を下唇に当てる: vertically /ˈvɝ.tɪ.kəli/, vanish /ˈvænɪʃ/, constructive /kənˈstɹʌktɪv/, activation /ˌæktəˈveɪʃən/
- /f/ — 「フ」ではなく、上の歯と下唇で出す: decipher /dɪˈsaɪfə(ɹ)/, fixation /fɪksˈeɪʃən/, flawed /flɔːd/
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。
- まず0.75倍速で一文ずつシャドーイングし、慣れてきたら通常の速度に戻します。
- 自分の声を録音して元の音声と比べます。horizontal, retina, blink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。