The definition of intolerance of ambiguity as a predisposition to perceive lack of structure as a possible threat implies that both environmental demands and the individual's coping resources will affect that perception. Thus, Raphael and his colleagues, in establishing the relationship of intolerance of ambiguity to intelligence and the need to control for this relationship, have made a point long overdue. Christie (1970) anticipated their point when he noted that Machiavellian individuals tend to prefer unstructured situations since this provides them greater opportunities to manipulate others. Further, I would expect that both age and situations of chronic stress (unemployment, social marginality, illness, etc.) would be positively related to intolerance of ambiguity. On a more general level, the conclusion by Raphael and his colleagues that "it may be more useful to view intolerance of ambiguity as an intervening variable reflecting individuals' repertoire of coping skills," while tenable, raises a basic theoretical question. We know what is meant by intolerance of ambiguity operationally, but do we know what is meant by it as a personality variable? By and large, any relatively general and persistent response tendency in individuals is categorized as a personality variableand there appears to be no limit to the number of variables which can be so labelled. Unfortunately, the