Sleep: Biological Processes
Explain the role of the brain, biological timing, sleep stages and dreaming within the mandatory Sleep and Dreams topic.
How to study Higher Psychology
Build each answer from accurate psychological knowledge, named evidence, application to behaviour, analysis and justified evaluation.
Core concepts
Concept 1
role of the brain in sleep
Exam cue: Connect biological processes to observable sleep behaviour.
Concept 2
circadian rhythms and environmental cues
Exam cue: Distinguish an endogenous rhythm from an external synchronising cue.
Concept 3
non-REM sleep
Exam cue: Compare non-REM and REM using several features.
Concept 4
REM sleep and dreaming
Risk pitfalls and guardrails
Treating every dream as occurring only in REM.
Guardrail: Avoid deterministic claims, unsupported causation and generic evaluation disconnected from the named evidence.
Confusing a circadian rhythm with a single night’s routine.
Guardrail: Avoid deterministic claims, unsupported causation and generic evaluation disconnected from the named evidence.
Listing sleep stages without explaining their behavioural significance.
Guardrail: Avoid deterministic claims, unsupported causation and generic evaluation disconnected from the named evidence.
Memory anchors
Circadian rhythm
An approximately 24-hour biological cycle, including the sleep–wake cycle.
Zeitgeber
An external cue, such as light, that helps synchronise a biological rhythm.
Non-REM
Sleep characterised by stages of progressively deeper sleep and generally slower brain activity.
REM
A sleep phase associated with rapid eye movements, vivid dreaming and high brain activity.
Brain and sleep
Brain systems regulate arousal, sleep stages and the timing of the sleep–wake cycle.
Compare stages
Use physiology, brain activity, eye movement and reported dreaming rather than one feature alone.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
A student becomes sleepy at roughly the same time each evening even during a quiet weekend. Which process best explains this pattern?
Morning daylight repeatedly resets a teenager's sleep–wake timing. In this example, daylight acts as what?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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