| Summary: | "This book examines the general purposes of mental tests, lays down rules for their conduct, and explains the methods of treating data. In this connection, the calculation of measures of general tendency, measures of variability, indexes of correlation, and other statistical constants are discussed. This second edition has undergone extensive revision and alterations in the text. The attempt has been made to eliminate a number of confusing typographical errors; a new and better system of abbreviations for titles of periodicals has been introduced; the directions for conducting the tests have been modified where ambiguity was felt; numerous tables and graphs have been added; the section upon the treatment of measures has been expanded; and several new tests have been inserted. These changes have so increased the material as to make it desirable to divide it into two parts, the first dealing with simpler, the second with more complex processes"--Pref. (PsycINFO Database Record (c) 2005 APA, all rights reserved)
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