“…Anna Freud does not, however, mention which of these partly inconsistent hypotheses is less tentative, nor is the choice among them made easier by the fact that most, if not all, have received some measure of empirical confirmation. Thus the first hypothesis was supported by Fenz & Epstein ( I 962) and Inglis (1961), the fourth by Blum (1955) and Weinstock (1967), and the fifth by Byrne (1964), Conn & Crowne (1964), Kogan (1956), Palmer (1968), etc. Moreover, experimental support has also been found for other non-psychoanalytic hypotheses ; for example, the hypothesis that the choice of defence is determined by situational features and characteristics of the available external stimuli (Bramel, 1962(Bramel, ,1963Eldow & Kiesler, 1966;Hackett & Weisman, 1964;Miller & Swanson, 1960).…”