“…Indeed, one must be prepared to find that when the clinician gets an urge to be really experimental, he naively does a classical, bivariate, brass instrument experiment that denies his whole birthright. There are striking exceptions to this as in the work of Ackerman (1942), Baggaley (1958), Barratt (1962), Berg (1955), Burt (1940), Butler (1954), Cartwright (1957), Campbell (1950), Coan (1959, Damarin (1963), Digman (1963), Dingman (1958), Eysenck (1952), Fiske (1949, Geertsma (1959), Holzman (1963, Horn (1961), Howard (1961), Karson (1958Karson ( , 1959Karson ( , 1961, Lorr (1953Lorr ( , 1955, McQuitty (1954), Meehl (1954), , Norman (I960), Peterson (1959), Schaie (1958), Sells (1957Sells ( , 1962, Sweney (1962Sweney ( , 1963, Taylor (1950), Thorndike (1961), Watson (1959), Wittenborn (1951) and some others. But these are an unusual kind of clinical psychologist, though, let us hope, a vanguard.…”