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Intelligence tests --- Intelligence --- Tests

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"During the course of some twenty-five years of psychological study, a view of mental organization has emerged which brings normal and abnormal mental conditions together under the same laws and furnishes a principle by means of which they can be better understood. Capacity to make satisfactory social and vocational adjustment has been shown to depend upon the functioning efficiency of mental potentialities; while deteriorated, psychotic, and border-functioning mental conditions have been shown to be directly related to measurable degrees of mental inefficiency. The attempt has been made to prove that just as the art of medicine cannot be applied without consideration of the strength or weakness of different bodily organs and functions, so many of the alleged principles in psychology, such as those having to do with environmental conditions, motivation, aims, and mental habits including complexes, phobias, or parental preferences, cannot be invoked as concepts in psychology without consideration of the efficiency with which underlying mental factors can function so as to make re-education and the control of behavior possible. It has become evident that the concept of efficiency of mental functioning is a basic factor in both normal and abnormal mental phenomena, and that it is of first importance that psychologists perfect the instruments by means of which this phase of mental organization can be evaluated. These investigations have definitely established that results of research are meaningless without some knowledge of both potential intellectual level and the efficiency with which it functions. Advance in the science of psychology will depend greatly upon recognition and control of these two factors"--Foreword. (PsycINFO Database Record (c) 2014 APA, all rights reserved).

Intelligence tests. --- Ability --- Psychology, Pathological. --- Testing.