Scale (HADS) [19]. The personality traits of the Five Factor model (see Introduction) were measured using the NEO Five-Factor Inventory [20]. The NEO Five-Factor Inventory (NEO-FFI) is a 60-item inventory consisting of 12 items for each of the five factors. Participants also completed the IPIP Big-Five 50-item inventory [21], consisting of 10 items for each of the Big-Five personality factors. The participants were given the personality questionnaires with written instructions at the end of their clinic visit and asked to return them by post.
