A sleep researcher records that a participant's eyes are moving rapidly and their brain activity looks similar to when they are awake, but their body muscles are very relaxed. When woken, the participant reports a vivid dream.
Explain why the researcher concludes that the participant was in REM sleep.
48 exam-style questions on Edexcel GCSE Psychology 9.1 Sleep and dreaming, covering 9.1.1 Functions, features and benefits of sleep, 9.1.2 Internal and external influences on sleep, 9.1.3 Sleep disorders, 9.1.4 Freudian theory of dreaming (Freud, 1900), and 9.1.5 Activation Synthesis Theory (Hobson and McCarley, 1977). Each one has a worked solution and a mark scheme showing where the marks go.