Shadowing Practice: IELTS Listening Part 4: A Lecture on Sleep and Memory - Learn English Speaking with Video
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Part Four. You will hear a lecture about sleep and memory.
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You have some time to look at questions thirty-one to forty.
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Now listen carefully and answer questions thirty-one to forty.
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Good morning. Today, I want to challenge a habit many of you share: the all-nighter.
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Yes, I can see some guilty faces already!
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We tend to think of sleep as wasted time, a pause in our productivity.
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In fact, it's one of the busiest periods for the brain.
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During deep sleep, a region called the hippocampus replays what we learned that day.
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Those memories are then gradually moved to the cortex for long-term storage.
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Think of it as moving files from a cluttered desktop into a well-organised archive.
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The evidence is striking.
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In one study, students who missed a night's sleep were around forty percent worse at forming new memories!
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In other words, cramming all night can undermine the very learning you're trying to do.
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Later in the night, during dreaming or REM sleep, something rather different happens.
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The brain links new information with old, which seems to boost creativity.
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Legend has it that Mendeleev saw the periodic table in a dream, though historians are sceptical!
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So, what does this mean in practice?
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First, review difficult material shortly before you go to bed.
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Second, a short nap of around twenty minutes can sharpen your focus.
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And above all, protect seven to nine hours a night, especially before exams.
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Next week, we'll look at what happens to memory as we get older.
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Until then, get some sleep. Thank you!
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That is the end of Part Four.
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Vocabulary and speaking notes for this lesson
This C1 speaking lesson is built on the video “IELTS Listening Part 4: A Lecture on Sleep and Memory”. This video has 23 sentences and 271 words to shadow. The speech runs for 1:49. The speaker talks at a steady 149 words per minute, a comfortable pace for shadowing. Only 81% of the words are among the 3,000 most common in English, so the vocabulary is demanding.
Key vocabulary in this video
The 14 most advanced words in the video, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| clutter noun | /ˈklʌtɚ/ | A confused disordered jumble of things. |
| hippocampus noun | /ˌhɪpə(ʊ)ˈkæm.pəs/ | A mythological creature with the front head and forelimbs of a horse and the rear of a fish. |
| nighter noun | Someone or something who does something for a certain number of nights | |
| sceptical adjective | Commonwealth standard spelling of skeptical. | |
| sharpen verb | /ˈʃɑɹpən/ | To make sharp. |
| cortex noun | /ˈkɔɹtɛks/ | The outer layer of an internal organ or body structure, such as the kidney or the brain. |
| periodic adjective | /ˌpɪɹiˈɑdɪk/ | Relative to a period or periods. |
| undermine verb | /ˌʌn.dɚˈmaɪn/ | To dig underneath (something), to make a passage for destructive or military purposes; to sap. |
| replay noun | /ˈɹiːpleɪ/ | An act or instance of replaying (of playing something, such as a game, again); a replaying of (something). |
| historian noun | /hɪˈstɔɹi.ən/ | A writer of history. |
| desktop noun | /ˈdɛsktɒp/ | The top surface of a desk. |
| archive noun | /ˈɑɹˌkaɪv/ | A repository or other place for storing material (such as documents and records) no longer in current use, and usually having historical value. |
| pause noun | /pɔːz/ | A temporary stop or rest; an intermission of action; interruption; suspension; cessation. |
| creativity noun | /kri.eɪˈtɪv.ᵻ.ti/ | The ability to use imagination to produce a novel idea or product. |
Pronunciation to watch
- Long words — get the stress right: hippocampus /ˌhɪpə(ʊ)ˈkæm.pəs/, periodic /ˌpɪɹiˈɑdɪk/, historian /hɪˈstɔɹi.ən/, creativity /kri.eɪˈtɪv.ᵻ.ti/
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 clutter, hippocampus, nighter.
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.