There is at the present time a bewildering variety of schools of psychology in open rivalry and conflict with one another. The Press and the general public, in America, at least, seem to be aware of only two of these, namely the psychoanalytic and the behaviouristic schools; and the newspaper writers and the average highbrow are content to mix snippets and catchwords from these two utterly different schools, ignoring all the rest, unless they add to their shop-window display some uncertain reference to the work of the mental testers.