<p>Full facsimile of the original edition not reproduced with Optical Recognition software.&nbsp;This work attempted to fill the need for a presentation of real modern scientific psychology so that it could be understood by the average American enlisted man during World War II.&nbsp;It was intended so that every soldier who reads it should understand and use more effectively those most complicated instrumentalities of war that is his own human reactions.&nbsp;Many of the preeminent psychologists of the era contributed chapters.&nbsp;Profusely illustrated.</p>