Abstract: A method and system for assisting a professional person to advise a client comprises a computer system 101, which presents a questionnaire to a client on a screen 104. The questionnaire includes a number of questions from which one or more answers can be selected. Each possible answer has an associated numerical value, and, by adding up the value for the selected answers, the computer system is able to provide indications regarding the client's position can be determined. This has particular application in the diagnosis of psychiatric disorders, and allows for a more complete diagnosis, which can be achieved more quickly.