In the preceding chapter it was concluded that certain cognitive 'activities were more characteristic of individuals with internal rather than external control orientations. One possible interpretation derivable from these findings is that locus of control is an epiphenomenon. a mere diagnostic indicator of a person's natural capacities for achievement; that is, the more intelligent and achieving a person is. the more likely he will perceive himself to be an active, effective person. The research described in this chapter fails to support a simplistic, one-to-one relationship between locus of control and achievement. As in most instances, when a topic is closely scrutinized, the observed relationships are found to be anything but simple and conclusive. Nevertheless. it will be apparent that locus of control plays a mediating role in determining whether persons become involved in the pursuit of achievement.