 At present, most psychological measurement is conducted using nomothetic scales. These are based on questions chosen by professional experts and consisting of checklists of symptoms e.g., CORE-OM, PHQ-9. These questions are selected to be acceptable to large populations. However, given the diversity of problems presenting to mental health care services, a more personalised approach to psychological measurement might seem appropriate. Such an approach would shift the emphasis of measurement away from predefined, professionally-driven criteria, replacing it with a focus on those criteria given importance by the individual client. Individualised measures are questionnaires that include questions which can be generated by clients alone or in collaboration with the practitioner. This results in clients creating their own tailor-made questionnaire which only contains items that have meaning for them. Items are rated for intensity in a similar procedure to that of standardised measures. 