A History of the Association Psychology: By Howard C. Warren, Stuart Professor of Psychology, Princeton University. (Constable, London. 1921. Pp. 328. Price 16s.)

This book represents a painstaking labour of years. It will be of value chiefly to specialist workers on the subject; for the general reader

it is rather dry and lifeless. It is a conscientious collection of the various stages in the development of views on the subject of association, from Plato to the present day. Two deficiencies of the book may be remarked on. While the account of the earlier English Associationists is clear and full, that of later workers is presented in such a condensed way as to render it not always easy to appraise it. In the second place, little effort is made to bring this earlier form of psychology into line with that of the present day, and, indeed, it may be said that practically all the book could have been written fifty years ago. Even on the subject of association itself there is no sign of any modern outlook. Jung's revolutionary work on the subject, for instance, is dismissed in half a page, without any hint of its implications; the words 'complex' and 'psycho-analysis' are not to be found at all. Within these limits the book will doubtless constitute a useful reference work for historical purposes.