This worksheet covers the purpose of sleep, the sleep–wake cycle, sleep deprivation, and the He et al. (2020) study.
Part A — Purpose and the sleep–wake cycle
Q1. Provide a psychological definition for the term 'sleep'. (1 mark)
Q2. State one purpose of sleep according to each perspective:
(i) Evolutionary:
(ii) Restorative:
(2 marks)
Q3. Identify the stage of the sleep–wake cycle responsible for the majority of dreaming and state four characteristics of that stage. (5 marks)
Part B — Sleep deprivation
Q4. Define 'sleep deprivation' and distinguish between partial and chronic sleep deprivation. (4 marks)
Q5. Identify and explain two causes of sleep deprivation for a person who has just started shift work in a noisy apartment. (6 marks)
Part C — Sleep hygiene and research
Q6. State the aim, sample and key finding of the study by He et al. (2020). (5 marks)