February 2007
Beginner to intermediate
464 pages
16h
English
book
Pharmaceutical Statistics Using SAS
by Ph. D. Alex Dmitrienko, Ph. D. Christy Chuang-Stein, Sr. Ralph B. D'Agostino
Content preview from Pharmaceutical Statistics Using SAS
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13.4. Summary
This chapter summarizes the importance of and methods for establishing the reliability and validity of rating scales. Quality quantitative scientific research must include the use of measurement tools that have been validated for the population under study. The validation of an instrument is not a single test, but a summary of multiple psychometric properties. That is, a scale should have acceptable levels of internal consistency,test-retest reliability, inter-rater reliability, convergent, divergent and discriminantvalidity, as well as responsiveness.
A rating scale is said to be reliable if multiple measurements on a subject agree. Aspects of reliability presented in this chapter include internal consistency, test-retest reliability, ...
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