The think aloud method is a practical approach to modeling cognitive processes in problem-solving. This book provides a detailed description of the method, which involves asking individuals to verbalize their thoughts while solving a problem and analyzing the resulting verbal protocols. The method is used in psychological and educational research on cognitive processes and for knowledge acquisition in building knowledge-based computer systems. It is a unique source of information on cognitive processes and is used by psychologists and knowledge engineers to understand and model human problem-solving. The book is intended for two types of readers: social scientists interested in cognitive processes and knowledge engineers interested in knowledge acquisition. It includes introductory sections on topics relevant to both audiences, making it accessible to readers familiar with either of the two major application areas. The book discusses the aspects of computer models directly associated with the think aloud method but not programming techniques. The book is based on a long tradition at the University of Amsterdam, starting with Otto Selz in the 1930s and continuing through the 1940s and 1960s. It includes examples from studies on architectural design and physics problem-solving, illustrating how the think aloud method can provide insights into cognitive processes. The book also discusses the use of the method in building knowledge-based systems and provides examples of how protocols can be analyzed to model cognitive processes. The think aloud method is used to study cognitive processes in problem-solving, including the analysis of verbal reports, observation methods, and structured techniques. The book describes the method in detail, including practical procedures for collecting verbal protocols and analyzing them to build models of problem-solving. It also discusses the use of the method in building knowledge-based systems and provides examples of how protocols can be used to model cognitive processes. The book concludes with exercises and examples of the method's application in various contexts.The think aloud method is a practical approach to modeling cognitive processes in problem-solving. This book provides a detailed description of the method, which involves asking individuals to verbalize their thoughts while solving a problem and analyzing the resulting verbal protocols. The method is used in psychological and educational research on cognitive processes and for knowledge acquisition in building knowledge-based computer systems. It is a unique source of information on cognitive processes and is used by psychologists and knowledge engineers to understand and model human problem-solving. The book is intended for two types of readers: social scientists interested in cognitive processes and knowledge engineers interested in knowledge acquisition. It includes introductory sections on topics relevant to both audiences, making it accessible to readers familiar with either of the two major application areas. The book discusses the aspects of computer models directly associated with the think aloud method but not programming techniques. The book is based on a long tradition at the University of Amsterdam, starting with Otto Selz in the 1930s and continuing through the 1940s and 1960s. It includes examples from studies on architectural design and physics problem-solving, illustrating how the think aloud method can provide insights into cognitive processes. The book also discusses the use of the method in building knowledge-based systems and provides examples of how protocols can be analyzed to model cognitive processes. The think aloud method is used to study cognitive processes in problem-solving, including the analysis of verbal reports, observation methods, and structured techniques. The book describes the method in detail, including practical procedures for collecting verbal protocols and analyzing them to build models of problem-solving. It also discusses the use of the method in building knowledge-based systems and provides examples of how protocols can be used to model cognitive processes. The book concludes with exercises and examples of the method's application in various contexts.