Psychometric testing sometimes takes place within the context of an assessment centre Organisations use a range of selection methods, including interviews, group exercises and role playing, in-basket exercises and other methods, as well as psychometric testing in order to select from a pool of job applicants. Assessment centre selection methods can take one or two days to complete, and because of the cost and time taken they are sometimes referred to as the ‘Rolls-Royce’ of selection methods.