Researching and developing mental health and well-beingassessment tools for supporting employers and employees inWales

The assessment and management of mental health and psychological well-being is an important issue in applied settings such as the workplace. In these settings however, the issues of practicality in terms of the resources available to devote to assessment and management are limited. This thesis presents research which aims to establish whether a single-item, multidimensional approach can be used to provide a practical way of measuring well-being in a short space while assessing and predicting well-being to a comparable level to traditional multi-item scales. Single-item measures were developed to assess well-being in terms of circumstances, individual differences, personality, and outcomes. These items were compared to multi-item measures in terms of their ability to measure the constructs in question and to predict well-being outcomes from predictor variables in samples of university staff, nurses, and students. The results indicate that many of the items are comparable to their multi-item counterparts and that single-item predictor measures can predict significant variance in well-being outcomes in both working adults and students. The result is a set of items that can be combined to create a wellbeing assessment tool that identifies well-being issues and potential causes. An example tool was prototyped in a small Welsh mental health support business.