How to Write an A2 Psychology Essay Dear Mr Walsh I have a unit 4 AQA psychology exam next week and I find it difficult to write essays. I am not sure what to include and how to structure the answers. Pleeze can u help? Duncan Hi Duncan It really depends on the actual question you get. I will give you a basic guide to answering a question that asks you to discuss a theory. I hope it also gives you some ideas about answering other types of questions.