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Document Type

Research

Abstract

Perhaps no other science is as conscious of validity coefficients as psychology. This may be partly due to the impetus given statistical methods by such early investigators as Galton, Pearson, Yule, and Spearman. Later work by Thurstone, Fisher, Holzinger, Garret and others has kept the profession highly conscious of the need for refined and, in some instances, involved statistical evaluation. In certain types of experimental work, such as mental testing, it is highly essential to keep the validity of tests high. It is, of course, taken for granted that in any science accurate measuring instruments are available for use without elaborate standardization. It should be unnecessary to spend time in making two or three hundred measurements with a high grade scale to be sure of the accuracy. Instead, a single test weight is used to check the accuracy of the instrument.

Publication Date

1947

Journal Title

Proceedings of the Iowa Academy of Science

Volume

54

Issue

1

First Page

239

Last Page

241

Copyright

© Copyright 1947 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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