Qualities of Effective Measurement Instruments
|1.||To what extent will the interpretation of the scores be appropriate, meaningful, and useful for the intended application of the results, and|
|2.||What are the consequences of the particular uses and interpretations that are made of the results? (Linn & Gronlund, 2000)|
This chapter will explain the concept of measurement validity, the role of reliability, and their effects on the interpretive quality of measurement results. It will also discuss important practical considerations that might affect the choice or development of tests and other instruments.
Definitions of validity have changed over time. Early definitions, in the 1940s and early 1950s, emphasized the validity of the test itself. Tests were characterized as valid or not, apart from a consideration of how they were used. It was common