Book excerpt: Written by a senior examiner, Jean-Marc Lawton, this AQA(A) A2 Psychology Student Unit Guide is the essential study companion for Unit 4: Psychopathology.This full-colour book includes all you need to know to prepare for your unit exam: clear guidance on the content of the unit, with topic summaries, knowledge check questions and a quick-reference index examiner's advice throughout, so you will know what to expect in the exam and will be able to demonstrate the skills required exam-style questions, with graded student responses, so you can see clearly what is required to get a better grademeets 2012 specification changes