This site is designed to provide information for researchers who are interested in using the CASP measure of quality of life. CASP stands for Control, Autonomy, Self-realisation and Pleasure. It is an easy to administer, self-completion scale of either 19 or 12 questions that measures quality of life in later life. Since it was developed in 2003/4 CASP has gone on to be used in a variety of studies around the world and has been translated into several languages. It has been included in the Survey of Health, Ageing and Retirement in Europe (SHARE), the English Longitudinal Study of Ageing (ELSA), the Health and Retirement Survey (HRS), the Health, Work and Retirement (HWR) survey in New Zealand, the Irish Longitudinal Study on Ageing (TILDA) and many more. It has also been used in smaller scale studies and even Randomised Control Tests. The validity, utility and adaptability of the CASP have made it one of the most commonly used measures of quality of life in later life.