Tom has just started working night shifts in a brightly lit hospital ward. He drives home in daylight at 8am and tries to sleep, but he lies awake for hours and feels wide awake at midday.
Explain Tom's difficulty sleeping using the ideas of endogenous pacemakers and exogenous zeitgebers.
53 exam-style questions on OCR GCSE Psychology 6.1 Key Concepts, covering 6.1.1 Functions, features and benefits of sleep, 6.1.2 Causes of sleep disorders, and 6.1.3 Endogenous pacemakers and exogenous zeitgebers. Each one has a worked solution and a mark scheme showing where the marks go.