ABSTRACT
Introduction One of the delights of working with individual differences is its applicability. Most if not all branches of applied psychology seem to need to measure individual differences for one reason or another and so this overview is necessarily selective: covering the whole of each area in depth would require another book. The tests that are used should have been constructed as described in Chapter 18, although occasionally applied psychologists have been known to cut corners and use tests without strong evidence that they are valid for the purpose which is intended or where the reliability within the particular population is either unknown or lower than one would hope. This list is by no means comprehensive. For example, sports psychologists use mood scales extensively, particularly the Profile of Mood States (Lorr and McNair 1988), but the use of such techniques is fairly obvious and the results are pretty much as one would expect. I have instead mentioned a few areas in some depth because of their theoretical or practical importance.
