First published in 1922, this popular title by R. S Woodworth was revised several times. This twentieth edition from 1949 brought D.G. Marquis on board and was thoroughly revised again, originally published in its current form in 1963. One of the most famous and successful introductions to psychology ever published, this book was very popular in universities and training colleges at the time. Now available again after many years it can be read and enjoyed in its historical context.