Shadowing Practice: CET-6 Listening Practice: How Sleep Protects Memory - Learn English Speaking with Video
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1
Good morning, everyone, and welcome to today's talk on sleep and memory.
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Most of us assume that forgetting simply happens with the passage of time.
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The longer ago we learned something, the more of it fades away.
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But is time really the main cause of forgetting?
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More than a hundred years ago, two American psychologists decided to put this idea to the test.
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In nineteen twenty-four, John Jenkins and Karl Dallenbach conducted a simple but clever experiment.
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They wanted to know whether sleep affects how quickly we forget new information.
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Two university students took part, and they were asked to learn short lists of nonsense syllables.
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These were meaningless combinations of letters, so the students could not rely on what they already knew.
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They were then tested after one, two, four or eight hours.
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Sometimes they spent that interval asleep, and sometimes they went about their normal daily activities.
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The results turned out to be remarkably clear!
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After eight hours of sleep, the students could still recall about half of the syllables.
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After eight hours awake, however, they remembered only around one syllable in ten!
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In other words, staying awake led to far more forgetting than sleeping did.
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The researchers concluded that forgetting is not simply a matter of time passing.
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Instead, new experiences during the day seem to interfere with what we have just learned.
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However, we should be careful not to draw strong conclusions from a single study.
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Only two people took part, which is an extremely small sample.
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Moreover, memorizing nonsense syllables in a laboratory is very different from studying real subjects.
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Fortunately, many later studies with far larger groups have produced similar results.
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Many scientists now believe that the sleeping brain actively strengthens new memories.
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This suggests that sleep is not wasted time, but an essential part of learning.
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So if you want to retain what you study, review it and then sleep on it.
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Staying up all night before an exam may well do more harm than good.
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Next time you are tempted to give up sleep for extra study, remember these two students.
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Thank you for listening, and sleep well tonight.
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Vocabulary and speaking notes for this lesson
This C1 speaking lesson is built on the video “CET-6 Listening Practice: How Sleep Protects Memory”. The speaker keeps coming back to these words: sleep, syllable, forgetting, students, eight. This video has 27 sentences and 358 words to shadow. The speech runs for 2:25. The speaker talks at a steady 148 words per minute, a comfortable pace for shadowing. 85% of the words are among the 3,000 most common in English; the rest is worth studying before you start.
Key vocabulary in this video
The 13 most advanced words in the video, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| syllable noun | /ˈsɪl.ə.bəl/ | A unit of human speech which often forms words corresponding to one opening of the mouth; a vowel and its surrounding consonants. |
| memorize verb | /ˈmɛm.əˌɹaɪ̯z/ | To fully learn so as to have entirely available to the memory; to learn by heart, commit to memory. |
| meaningless adjective | /ˈmiː.nɪŋ.ləs/ | Lacking meaning. |
| remarkably adverb | /ɹɪˈmɑɹkəbli/ | In a remarkable manner. |
| interval noun | /ˈɪntɚvəl/ | A distance in space. |
| psychologist noun | /ˌsaɪˈkɑl.ə.d͡ʒɪst/ | An expert in the field of psychology. |
| combinations noun | /kɑmbɪˈneɪʃənz/ | A one-piece form of underwear, being a combination of a vest or chemise and underpants. |
| fade verb | /feɪd/ | To hit the ball with the shot called a fade. |
| interfere verb | /ˌɪn.tɚˈfɪɚ/ | To get involved or involve oneself, causing disturbance. |
| conclude verb | /kənˈkluːd/ | To end; to come to an end. |
| researcher noun | /ˈɹiˌsɝ.t͡ʃɚ/ | One who researches. |
| fortunately adverb | /ˈfɔɹ.t͡ʃə.nɪt.li/ | In a fortunate manner. |
| strengthen verb | /ˈstɹɛŋ(k)θən/ | To make strong or stronger; to add strength to; to increase the strength of; to fortify. |
Phrasal verbs you will hear
| Word | Meaning |
|---|---|
| give up verb | To surrender (someone or something); to inform on (someone). |
| stay up verb | To remain awake; to not go to bed. |
Grammar in this video
The structures the speaker uses most, with the exact words from the video:
| Structure | In the video |
|---|---|
| Passive voice be + past participle — the focus is on what happens, not who does it | were asked · were then tested · is not wasted |
| Present perfect have/has + past participle — a past action that still matters now | have just learned · have produced |
Pronunciation to watch
- Long words — get the stress right: remarkably /ɹɪˈmɑɹkəbli/, psychologist /ˌsaɪˈkɑl.ə.d͡ʒɪst/, combinations /kɑmbɪˈneɪʃənz/, fortunately /ˈfɔɹ.t͡ʃə.nɪt.li/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
- Record yourself and compare with the original, paying attention to words like syllable, memorize, meaningless.
What is the Shadowing Technique?
Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.