In this article the Think-Aloud Method, a method used in problem solving research in Psychology, is used in legal research to gather data on how novices, expert beginners and experts read, structure and analyse legal decisions. In the Dutch legal system decisions by judges are a major source of law. So it is important that law students learn to read, structure and analyse legal decisions. However, reading and understanding a decision does not go without saying, it has to be learned. The data we gather using the Think-Aloud Method are used to improve instruction to support the effective and efficient learning of comprehending legal decisions. We describe the Think-Aloud Method, our experimental design and our approach for analysing the protocols.