These concepts will be discussed in turn. A good measurement scale should be both reliable and valid. The measurement of psychological attributes such as self esteem can be complex. Measurement of some characteristics such as height and weight are relatively straightforward. The collection of data involves measurement. State the how reliability determines the upper limit to validity.Distinguish between reliability and validity.State the effect of test length on reliability.Define the standard error of measurement and state why it is valuable.Compute reliability from the true score and error variance.Describe reliability in terms of true scores and error.(16pp.Prerequisites Values of Pearson's Correlation, Variance Sum Law, Measures of Variability Studies with slightly higher validities may be questioned as well, perhaps repeated, and the criterion examined carefully. Values below these may be owing to accidents of sampling, computing errors, or criterion defects, and it should be noted that 95 percent is a conservative standard. 55 for either SAT-V or SAT-M true scores for all SAT takers, and 95 percent of the observed validities were above. The average validities were quite high, rising to. For these data, substantial validity was the rule. However, significant institutional uniqueness remains, though part of that uniqueness consists of variation in the reliability of first-year college average. The hypothesis of equal validity in pools like those of all SAT takers, plus sampling variance and the effects of selection, accounted for 53 percent and 33 percent of the variation of the SAT-verbal and SAT-mathematical validities, respectively. Substantial validity generalization was found: the assumption that applicant pool validities were all equal, together with sampling variance and the effects of selection, accounted for 36 percent and 34 percent of the variation of the SAT-V and SAT-M validities, respectively. In addition to test validities based on first-year college averages, validities for each college were also estimated for two other groups-applicants for admission to the colleges, and all SAT takers. This study, which focused on the validity of the SAT-V and SAT-M, used data from 99 validity studies that were conducted by the Validity Study Service of the College Board.

Generalization of SAT Validity Across Colleges SAT Author(s):ĭocument Type: Report Page Count: 16 Subject/Key Words:

Sat validity and reliability