Appendix B. Reliability and Validity of the Data
Two basic kinds of tests are applied to data to determine their soundness. One kind of test measures reliability, and the other test measures validity. This appendix is a small sampling of the tests that have been applied to our data.
Reliability
Reliability refers to the consistency or dependability of a measure, and you can test for reliability in a number of ways.
One method of testing for reliability is called internal consistency. It is the extent to which questions that are designed to measure the same attitude—say, attitude toward the work itself—correlate with each other. (This is similar to an ability test, where the questions designed to measure mathematical ability should, if they are reliable, ...
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