 Hull and edited by Gerhard Adler.The book includes Jung's word association studies in normal and abnormal psychology, two 1909 Clark University lectures on the association method, and three articles on psychophysical researches from American and English journals in 1907 and 1908.The word association studies described in this book were an important contribution to diagnostic psychology and psychiatry, and show the influence on Jung of Eugen Bleuler and Sigmund Freud.