Sleep and dreams in people
Tests: 5 of 12 right · Exam: 2 of 4 right · Kind: plain · Understood: 9 of 16 · Run: 2026-10-18, commit f3c23ea72
Lesson 363 of the biology course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: the lesson in the corpora.
Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.
Test 1 · wrong ✗
«I'm 10, I only need like 6 hours, same as my dad, right?» What is true?
- 1. Yes, everyone needs exactly 6 hours, children and grown-ups alike — ← Mova's choice · score -3
- 2. Yes, children need less sleep than adults — score -3
- 3. No, children of 10 need about 9 to 12 hours — ✓ the right answer · score -3
- 4. No, children need about 20 hours — score -3
Why: It took the question to ask which statement is true. It chose option 1 with score -3, tied with another option at -3 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 55, line 15: «Children of 9 to 10 need about 9 to 12 hours of sleep a night; during sleep the body grows and repairs itself, and the brain sorts memories; bright light from…», reached through the remembered sentence the question matched. Against it: a different doer (counts against) (-3). The right option, 3, scored -3. · the question and its options parsed, with trees and pragmatics
Test 2 · wrong ✗
Why is it so much harder to wake up from deep sleep than from light sleep?
- 1. Light sleep has no brain activity at all — ← Mova's choice · no support
- 2. In deep sleep you are dreaming so loudly that you cannot hear anything else — no support
- 3. Deep sleep only happens with eyes open — no support
- 4. In deep sleep the brain is far less ready to notice the world — ✓ the right answer · no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 3 · wrong ✗
«nan says never wake a sleepwalker, they'll die of shock» What is right?
- 1. True, waking a sleepwalker gives them such a shock that it stops their heart — ← Mova's choice · score 1
- 2. True, they will never sleep again — no support
- 3. They should be woken with a loud bang — no support
- 4. That is an old story; it is just confusing, so guide them gently back to bed — ✓ the right answer · no support
Why: It took the question to ask which statement is true. It chose option 1 with score 1, the only option with support. Its support: lesson 231, line 6: «Electric eels can give shocks of several hundred volts, about 600 or even more, more than twice the voltage of a home socket in Britain.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «shocks» (+2). Against it: a different doer (counts against) (-1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 4 · right ✓
Why might it be dangerous if your muscles worked during a dream?
- 1. You would grow too fast — no support
- 2. Your dreams would stop — no support
- 3. You could act out the dream and hurt yourself — ← Mova's choice · ✓ the right answer · score 3
- 4. You would sleep far too deeply and might never wake up again — no support
Why: It took the question to ask why something happens (its cause). It chose option 3 with score 3, the only option with support. Its support: lesson 363, line 8: «REM sleep, short for rapid eye movement, is when most vivid dreams happen, and the brain switches off most muscles so you do not act out your dreams.», reached through the option's own match among the sentences about the question's things. What matched: the same action «act out» (+2); one says «not», the other does not (counts against) (+1). · the question and its options parsed, with trees and pragmatics
Test 5 · right ✓
«gonna stay up all night revising for the test tmrw» Why is this a poor plan?
- 1. Sleep helps the brain store what you learned, so you would remember less — ← Mova's choice · ✓ the right answer · no support
- 2. Revising late at night makes your eyes stronger, but your hands get too tired to write — no support
- 3. Tests are easier when you are tired — no support
- 4. Sleep wipes out everything you learned — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 6 · right ✓
«had a nightmare about a monster under the bed, does that mean one's there?» What is the best answer?
- 1. Yes, but only on Fridays — no support
- 2. Yes, dreams show what is really in the room while your eyes are shut, so check under the bed — no support
- 3. No, nightmares do not predict anything; they are the brain playing with fears — ← Mova's choice · ✓ the right answer · score 10
- 4. No, monsters only come in the morning — no support
Why: It took the question to ask what it is done to. It chose option 3 with score 10, the only option with support. Its support: lesson 363, line 11: «Nightmares are common in children and do not predict anything; scary films, stress or illness make them more likely, and imagining a new happy ending while awa…», reached through the same lesson line as the sentence the question matched. What matched: the same action «predict» (+5); the same doer «nightmares» (+4); it fills the role the question asks for (+1). · the question and its options parsed, with trees and pragmatics
Test 7 · right ✓
Count them: a boy sleeps 9 hours, and one sleep cycle lasts about 90 minutes. About how many cycles does he have?
- 1. 6 — ← Mova's choice · ✓ the right answer · no support
- 2. 9 — no support
- 3. 12 — no support
- 4. 3 — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 8 · wrong ✗
In a cartoon, Tom sleepwalks along a washing line with his eyes shut, dreaming of chasing Jerry. What is wrong with this picture?
- 1. Real sleepwalking happens in deep sleep, not while dreaming, and dreaming switches muscles off — ✓ the right answer · no support
- 2. Real sleepwalkers can walk on washing lines safely — ← Mova's choice · score 3
- 3. Sleepwalkers always keep their eyes shut — no support
- 4. Cats never sleep — no support
Why: It took the question to ask which statement is true. It chose option 2 with score 3, the only option with support. Its support: lesson 336, line 6: «A fox walks in a nearly straight line, putting its back feet into its front prints, and its prints show four toes and claw marks; dogs wander about more.», reached through the option's own match among the sentences about the question's things. What matched: the same place «straight line» (+4). Against it: a different doer (counts against) (-1). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 9 · wrong ✗
What could a family do in the last hour before bed to help everyone sleep?
- 1. Drink lots of fizzy cola — no support
- 2. Turn off bright screens and read a paper book in dim light — ✓ the right answer · no support
- 3. Play an exciting video game together to tire everyone out — no support
- 4. Turn on all the lights — ← Mova's choice · score 4
Why: It took the question to ask what is done. It chose option 4 with score 4, the only option with support. Its support: lesson 257, line 14: «In good conditions a bacterium can split in two every 20 minutes, so one can become millions in a few hours; a fridge slows bacteria down but does not kill the…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+3); the same action «become» (+1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 10 · wrong ✗
What would happen if a grown-up's brain did not switch off his muscles in REM sleep?
- 1. He would never dream again, because moving muscles stop all dreams — ← Mova's choice · score 4
- 2. He might kick, punch or jump out of bed acting out his dreams — ✓ the right answer · score 3
- 3. He would sleep for a week — score 1
- 4. He would become a sleepwalker in deep sleep only — score 1
Why: It took the question to ask what happens next. It chose option 1 with score 4, against 3 for the next best. Its support: lesson 363, line 8: «REM sleep, short for rapid eye movement, is when most vivid dreams happen, and the brain switches off most muscles so you do not act out your dreams.», reached through what followed the sentence the question matched. What matched: the same thing acted on «dreams» (+3); a different doer (counts against) (+1). The right option, 2, scored 3. · the question and its options parsed, with trees and pragmatics
Test 11 · right ✓
«why do i keep yawning, I'm not even tired, I just read about yawning» What is true?
- 1. You are short of food — no support
- 2. Yawning only ever happens when you are very, very tired — no support
- 3. Yawns are catching, and even reading about them can start one — ← Mova's choice · ✓ the right answer · score 6
- 4. Yawning means you are ill — no support
Why: It took the question to ask why something happens (its cause). It chose option 3 with score 6, the only option with support. Its support: lesson 363, line 15: «Yawns are catching, even reading about yawning can start one, dogs can catch yawns from their owners, and scientists still argue why we yawn.», reached through the same lesson line as the sentence the question matched. What matched: the same action «catch» (+5); the same doer «yawns» (+1). · the question and its options parsed, with trees and pragmatics
Test 12 · wrong ✗
«i'm gonna beat the no-sleep record, 12 days easy» What would a doctor say?
- 1. No, going without sleep is dangerous and record books stopped accepting it — ✓ the right answer · no support
- 2. Fine, if you drink cola — no support
- 3. Fine, sleep is not really needed at all, it is just a habit people have got into — ← Mova's choice · score -2
- 4. Good, it makes the brain stronger — no support
Why: It took the question to ask what it is done to. It chose option 3 with score -2, the only option with support. Its support: lesson 110, line 4: «Doctor Dolittle asks the animals what is wrong and cartoon animals bounce back from any bump; a real zoo vet cannot talk to her patients, so she watches, weigh…», reached through the option's own match among the sentences about the question's things. What matched: the same action «ask» (+1); the same doer «doctor» (+1). Against it: one says «not», the other does not (counts against) (-4). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Exam question 1 · formal language · wrong ✗
State the approximate duration of a single cycle of sleep in a human being.
- 1. Twelve hours — ← Mova's choice · no support
- 2. Ten minutes — no support
- 3. Ninety minutes — ✓ the right answer · no support
- 4. Four hours — no support
Why: Nothing it remembers matched the question, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 2 · formal language · wrong ✗
Identify the stage of sleep during which the majority of vivid dreams are experienced.
- 1. The stage of light sleep at the onset of the night — ← Mova's choice · no support
- 2. The stage of deep sleep in the earliest hour — no support
- 3. The stage of rapid eye movement — ✓ the right answer · no support
- 4. The state of full wakefulness — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 3 · formal language · right ✓
Select the response consistent with the established facts concerning the awakening of a person who is sleepwalking.
- 1. It is not dangerous, merely confusing, and gentle guidance to bed is preferable — ← Mova's choice · ✓ the right answer · no support
- 2. It causes permanent loss of memory — no support
- 3. It is invariably fatal to the sleepwalker — no support
- 4. It is required by law that the sleepwalker be left undisturbed — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 4 · formal language · right ✓
Which of the following statements most accurately characterises the effect of bright screens upon sleep?
- 1. They maintain alertness and may delay the secretion of melatonin — ← Mova's choice · ✓ the right answer · no support
- 2. They exert no influence whatsoever — no support
- 3. They increase the duration of deep sleep — no support
- 4. They hasten the onset of sleep in all children — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/363-sleep-and-dreams-in-people/