During a conversation in the daytime, Theo suddenly falls asleep, even though he is trying to stay awake and slept well the night before. His friend says, "Theo has insomnia because he is tired."
Explain why Theo's friend is wrong.
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.