シャドーイング練習: Want to learn faster? Reduce cognitive load - 動画で英語スピーキングを学ぶ
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Hi, today I'm going to talk about cognitive load theory or cognitive overload,
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which is a new theory on learning about how the sort of intrinsic
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or even extraneous difficulty of a learning task impacts our ability to learn, to remember, to retrieve information and so forth.
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And I want to give you my perspective on this
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because I think it's quite interesting and it kind of touches on something that I've talked about before.
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In its essence, I feel that cognitive load theory is about how do you make the task easier, essentially.
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And the way you make a learning task easier as it applies to languages is to activate prior knowledge.
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In other words, if you can learn something that you kind of in a way already know, it's going to be easier to learn that.
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And if it's easier, you're going to be happier and more satisfied with the learning process, and you'll probably stay with the task.
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I've often said that language learning is a sort of a reiterative or an iterative process.
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You learn it once, you forget, you go back again.
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I've used the metaphor of my lawnmower, where if the grass of my lawn is very high, I will actually set the blaze a little higher, an inch or so higher,
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so that my first pass through the grass will be easier, and then my second pass will also be easier, and I'll have the same grass,
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but i'll have walked through the lawn twice with a little effort as opposed to pushing against
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much more resistance another example i used is cross -country skiing
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if it's snowing and you're going through tracks
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that have already been made by a skier ahead of you even
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if more snow has fallen on these tracks you're now gliding more easily it's more comfortable you're moving faster
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and so you're also taking advantage of in a way prior work
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or prior knowledge again i think a lot of these education experts have a tendency to overcomplicate things
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so they talk about the effect of cognitive overload on your short -term memory
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or working memory and retrieving and those are a lot of details
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that i don't fully understand but i can use my brain without knowing these things
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if i have a learning system and process
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that works i don't need to know in great detail how
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that all functions in my brain i don't need to know how my car works in order to drive my car.
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So one of the things that I have found is that prior knowledge, in other words, my previous exposure to a language, however imperfectly I remember that,
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however many gaps there are, it's all good.
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So if I, for example, I'm listening to a podcast in Persian and there's lots there that I don't understand,
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and I'm really only picking up certain chunks of words and phrases that I'm quite comfortable,
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that almost naturally understand, but I can't tie them all together to really understand the whole podcast, that is still good exposure.
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So that creates a sort of prior knowledge.
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Then when I go to link and I start clicking on these words to see what they mean, then I already have that first pass through,
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that first pass with a lawnmower that makes the second pass easier.
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It still doesn't guarantee that the next time I listen to it, I'm going to understand it all.
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It's all a gradual buildup through this iterative and reiterative and going back again process,
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which I think is the way to reduce the cognitive burden.
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Another sort of extraneous factor in cognitive overload is how enjoyable the task is.
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So if I am listening to something that's too difficult, that's not enjoyable.
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But on the other hand, if I'm listening to something that is of no interest to me, that's also not enjoyable.
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So as I've said before, if I'm dealing with content that is intrinsically interesting to me
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that lessens the extraneous burden of fighting to try to learn the language,
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deliberately try to learn the language from content that's of no interest or a voice that I don't like or a screechy, scratchy audio recording.
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In other words, everything that makes the task more enjoyable reduces the extraneous cognitive burden.
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Now, along the same lines we all have different tastes in
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what we like to do i'm not a fan of uh
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sort of deliberate retrieval exercises drills flashcards you name it that's not to say
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that people who like doing those things aren't going to benefit
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from them it's a matter of what people enjoy doing
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if you enjoy doing it then the extraneous sort of cognitive burden is is lessened
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so in my own case i like listening and reading
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and there is ample evidence that reading is in fact a form of retrieval exercise. In fact, it is retrieving words and phrases
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or in the case of listening sounds from a meaningful context which according to some research is more effective than
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trying to retrieve things in isolation.
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So where I'm coming from in this discussion of cognitive load is
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that it still comes down to the basic issue of trying to keep things simple and enjoyable.
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How do we encourage the learner to stay on task?
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How do we increase the likelihood that the learner will enjoy the process, the learning process?
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And in that sense, the emphasis should be the perspective of the learner rather than how teachers
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or educators can structure activities in the classroom or design textbooks or things of that nature, which introduce a level of complexity,
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which may, in fact, not contribute to lessening the cognitive load.
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Cognitive load will be lessened if the task is simpler, more straightforward, and more enjoyable.
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So as a layman, That's my reaction to this whole issue of the cognitive burden.
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Thank you for listening.
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この動画は誰におすすめ？
英語学習を効率化したい中級者から上級者、特に英語スピーキング練習やIELTS スピーキング対策を考えている人にぴったりです。「なぜ同じ努力でも成果が違うの？」と悩んでいる方に、学習効率を上げる鍵となる「認知負荷の軽減」を分かりやすく説明しています。
覚えておきたいフレーズ
- cognitive load：認知負荷（頭が働く際の負担）
- iterative process：反復的なプロセス（繰り返し行うことで徐々に習得する方法）
- extraneous factor：外因的要因（学習内容以外の影響する要素）
これらのフレーズは、学習法を議論する際に役立つだけでなく、shadow speech（シャドーイング）の際のリスニング素材としても使えます。
発音のポイント：ネイティブのリズムを捉える
動画のスピーカーは自然なアメリカ英語を話しています。shadowspeak（シャドーイング）の際は、特に「uh」「you know」などのフィラーワードの使い方と、文の途中でのポーズを注意深く聞き取りましょう。これらが自然なスピーキングのリズムを作り出しています。また、「cognitive」のような長い単語は、「コグニティブ」ではなく「コグニティヴ」と発音するのがポイントです。shadowing siteで同じテーマの動画を探し、繰り返し練習することで、発音とリズムを同時に磨けます。
興味のある内容を使うことで認知負荷が軽減されるという動画のメッセージは、シャドーイングにも応用できます。好きなトピックの素材を選べば、楽しみながら効率的にスピーキング力が上がります。
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 | I've talked · I've often said · have walked |
| 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 | been made · is lessened · will be lessened |
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。