“…Even a rather cursory audit of the available literature yields a very large number of potentially important contender independent variables: coping, beliefs, illness perceptions, somatization, attention, fear, avoidance, hypervigilance, depression, anger, endurance, attachment, childhood experience, goals, pacing, motivation, self, and so on. We have argued elsewhere that such a large number of variables as exist today in psychological studies is unwieldly, not easy for others outside the field to understand, and not easy to use to guide research or treatment designs (15,27,28). Some of the elements in our large variable set are difficult to distinguish from each other and some apparent distinctions are probably unimportant or impractical.…”