Pratica di Shadowing: The 15% Rule: How to Learn Faster | Andrew Huberman - Impara a parlare inglese con i video
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One of the biggest lies in public education about neuroscience is that every experience changes your brain.
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By the time I'm done saying this, your brain will be different.
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No, that's absolutely not true.
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That's a bunch of hooey.
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I studied neuroplasticity.
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I teach neuroplasticity.
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I'll tell you, you know what induces neuroplasticity?
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Being a baby who's trying to learn
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or being an adult who's forcing yourself to try and learn and you can't do the thing.
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The error is what stimulates the plasticity.
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And the appropriate level of difficulty, say the computational modeling is somewhere around 15 % on average.
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Now, what does that mean?
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You need to do a bout of work of 90 minutes to two hours.
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Like you got to strive and try and learn something.
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Do something hard every day mentally.
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This is critical for your ability to focus.
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And by the way, you asked about phones.
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Awesome study came out.
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They had people with their phone off, upside down on the table or in their bag,
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underneath their chair or in the opposite room, a separate room.
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And what they found is people can focus just fine in all three conditions.
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But if the phone is anywhere in the room, the amount of cognitive flexibility they have with the material they're focusing on is diminished.
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In other words, it requires more energy to focus, even if they're not getting calls and notifications.
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There's a subscript running in the brain, apparently, that's anticipating that this thing is going to reach for me.
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It's going to call me.
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So it's calling you even if it's not calling you, which is pretty cool.
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And so the way to increase focus and cognitive capacity is actually to just get the phone out of the room.
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That's a big part of it.
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Do some effortful learning bout, and it should feel like a fight.
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Keep in mind the friction you feel trying to learn something, that's adrenaline.
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Remember, how do we block learning?
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We block adrenaline, and it's downstream effects with propranolol.
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Being alert but calm or a little stressed and making errors through deliberate attempts to do something, not just throwaway errors.
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That's how you learn.
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Why?
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If I can reach out and grab this pen, my brain doesn't change.
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There's two kinds of practice.
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One is practicing doing things I already know how to do.
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There, you're aiming for 100 % performance, right?
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You're reinforcing what you already know how to do.
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Talk to a great dancer and they'll tell you they drill, drill, drill, drill the things they already know how to do.
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But when you're trying to learn the new language, the new emotional skill, the new physical skill, the new cognitive emotional skill.
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You need to make genuine attempts and you need to fail some of the time.
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And those failure signals are relayed to your cerebellum and your cerebellum propagates through networks that say change.
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So there's a set of conditions in the chapter on plasticity that say you need to be alert.
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So I talk about all the ways you can get alert, including pharmacology supplements and behavioral tools.
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Then you need to be focused.
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I talk about all the tools for focus, which you can devote to anything, not just learning.
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And then I talk about the conditions for plasticity.
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And you need to get this friction and these errors.
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And then you need to stop.
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You need to come back a day or two later, do it again.
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And then you need to make sure that you reinforce what you learned.
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Here's where AI is going to be a wonderful tool, already is a wonderful tool.
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The best way to learn is to not forget.
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Meaning if you test yourself mentally, or you could use any one of the LLMs, but I'll go into chat GPT and I'll just say,
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generate a short test of a graduate student at Stanford level, questions about neuroplasticity.
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And I go, oh, and I remember this, there's this one thing I don't remember.
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That's how you maintain and build knowledge over time.
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Self -testing, self -testing.
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People hear the word test, they think of external tester.
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You're the test taker, self -testing.
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That's a really interesting idea for this podcast episode, which we should definitely run.
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Should we generate a quiz?
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Yeah.
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So we can take the transcript and we can turn it into a test.
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Cool.
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Yeah.
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ChatGPT is great at doing this.
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You can change the difficulty and you can actually say, I'm a professor of neuroscience and I want a 15 % error rate on average.
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The study I love that really backs this up is
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that there've been a lot of studies of learning where they have students read the same passage one, two, three, or four times.
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And then they also have them highlight or take notes, or they just have them read it once and self -test.
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And they look six months and two years later.
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Reading it once, no notes, no highlighting and self -testing, you know, about a week later and looking up what you got,
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couldn't remember or got wrong led to much more stable learning over time.
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Awesome.
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Now this doesn't work so well for physical endeavors because there you have to like actually do the physical thing.
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You have to test yourself physically, but I love that set of experiments because it tells us everything we should be doing.
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Vocabolario e note di pronuncia per questa lezione
Questa lezione di conversazione si basa sul video “The 15% Rule: How to Learn Faster”. Le parole che ritornano più spesso: learn, test, error, learning, focus. Questo video contiene 79 frasi e 909 parole da ripetere con lo shadowing. Il parlato dura 4:40. Chi parla va veloce, circa 195 parole al minuto: aspettati suoni legati e ridotti. Il 85% delle parole rientra nelle 3.000 più comuni dell’inglese; conviene studiare le altre prima di iniziare.
Vocaboli chiave di questo video
15 parole del video che vale la pena imparare, con pronuncia e significato:
| Parola | Pronuncia | Significato |
|---|---|---|
| drill sostantivo | /dɹɪl/ | trapano, punta |
| skill sostantivo | /skɪl/ | abilità, capacità |
| alert aggettivo | /əˈlɝt/ | allerta, attento |
| cognitive aggettivo | /ˈkɑɡ.nɪ.tɪv/ | cognitivo |
| difficulty sostantivo | /ˈdɪfɪkəlti/ | difficoltà |
| generate verbo | /ˈd͡ʒɛn.ə.ɹeɪt/ | generare |
| highlight verbo | /ˈhaɪˌlaɪt/ | mettere in evidenza, enfatizzare |
| mentally avverbio | /ˈmɛntəli/ | mentalmente |
| bout sostantivo | /ˈbaʊt/ | attacco |
| friction sostantivo | /ˈfɹɪkʃən/ | attrito, frizione |
| reinforce verbo | /ˌɹiː.ɪnˈfɔːs/ | rinforzare |
| adrenaline sostantivo | /əˈdɹɛnəlɪn/ | adrenalina |
| stable sostantivo | /ˈsteɪ.bəl/ | stalla, scuderia |
| experiment sostantivo | /ɪkˈspɛɹ.ə.mənt/ | esperimento |
| genuine aggettivo | /ˈd͡ʒɛn.juˌɪn/ | genuino |
I phrasal verb che sentirai
| Parola | Significato |
|---|---|
| come back verbo | tornare |
| reach out verbo | protendersi |
Frasi da ripetere
Frasi brevi e complete del video che puoi riutilizzare nella conversazione di tutti i giorni:
- I'll tell you, you know what induces neuroplasticity?
- It's going to call me.
- Remember, how do we block learning?
- We block adrenaline, and it's downstream effects with propranolol.
- Should we generate a quiz?
Pronuncia a cui fare attenzione
Chi parla usa 18 contrazioni e forme ridotte, come you're, I'll, doesn't. Pronunciale nella forma breve, così come le senti.
- I suoni “sh” e “zh”: friction /ˈfɹɪkʃən/, notification /ˌnoʊtɪfɪˈkeɪʃn̩/, computational /ˌkɑmpjʊˈteɪʃənəl/, diminish /dɪˈmɪnɪʃ/
- Parole lunghe — attenzione all’accento: difficulty /ˈdɪfɪkəlti/, adrenaline /əˈdɹɛnəlɪn/, experiment /ɪkˈspɛɹ.ə.mənt/, flexibility /ˌflɛksɪˈbɪlɪti/, notification /ˌnoʊtɪfɪˈkeɪʃn̩/
I suoni difficili per chi parla italiano:
- /h/ — va soffiata, non è muta: highlight /ˈhaɪˌlaɪt/, behavioral /bɪˈheɪvjəɹəl/
- Consonante finale — senza aggiungere una vocale dopo: alert /əˈlɝt/, cognitive /ˈkɑɡ.nɪ.tɪv/, generate /ˈd͡ʒɛn.ə.ɹeɪt/, highlight /ˈhaɪˌlaɪt/, bout /ˈbaʊt/
- /æ/ — più aperta della “e”: passage /ˈpæsɪd͡ʒ/, podcast /ˈpɑdˌkæst/, dancer /ˈdænsəɹ/, anticipate /ænˈtɪs.ɪ.peɪt/, transcript /ˈtɹæn.skɹɪpt/
Come esercitarsi con questo video
- Ascolta tutto il video una volta senza parlare e annota le parole che non conosci.
- Inizia a velocità 0,75×, fai shadowing frase per frase e torna alla velocità normale quando diventa facile.
- Registrati e confronta con l’originale, facendo attenzione a parole come drill, skill, alert.
Cos'è la tecnica dello Shadowing?
Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.