By Frederic M. Lord
Some of the most vital books within the background of psychometrics has been nearly unavailable to students and scholars for many years. a spot within the information of contemporary attempt concept is now being crammed by way of the discharge in paperback for the 1st time of the vintage textual content, Statistical Theories of psychological attempt rankings, through the overdue and venerated statisticians and psychometricians, Frederic M. Lord and Melvin R. Novick. No unmarried booklet considering 1968 while Lord & Novick first seemed has had a similar impression at the perform of trying out and evaluation. details Age Publishing is proud to make this vintage textual content on hand to a brand new new release of students and researchers.
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The ratio of scale values has meaning in relation to such a scale, and hence we may speak of one unit having twice as much, or half as much, of the specified property as a second unit. Multiplicative transformations preserve the equalities of such ratios. ) Finally, absolute measurement presupposes additionally that the unit of measurement is fixed. In this case, any transformation will destroy some property of the scale. A counting operation produces absolute measurement. Examples of ordinal, interval, ratio, and absolute measurement will be given in appropriate places later in the book.
Such transformations preserve the equality of differences of scale scores. ) A fourth level of measurement, ratio measurement, additionally assumes the existence of a fixed zero point and permits only multiplicative (similarity) transformations. The ratio of scale values has meaning in relation to such a scale, and hence we may speak of one unit having twice as much, or half as much, of the specified property as a second unit. Multiplicative transformations preserve the equalities of such ratios.
The ratio of scale values has meaning in relation to such a scale, and hence we may speak of one unit having twice as much, or half as much, of the specified property as a second unit. Multiplicative transformations preserve the equalities of such ratios. ) Finally, absolute measurement presupposes additionally that the unit of measurement is fixed. In this case, any transformation will destroy some property of the scale. A counting operation produces absolute measurement. Examples of ordinal, interval, ratio, and absolute measurement will be given in appropriate places later in the book.