PSYC 3250 Chapter Notes - Chapter 6: Generalizability Theory, Reliability Engineering
8 Dec 2015
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The reliability of test scores is important in determining whether or not a test can provide a good measurement for the construct in question. Reliability of test scores is largely concerned with the consistency or inconsistency of a measurements test scores. A measure that has highly inconsistent scores is not reliable. Sources of consistency and inconsistency in test scores. Individual level of ability on traits required in this test but not in others. Knowledge and skills specific to a particular form of test items. Stable response sets (not wanting to select 90 a"s on a multiple choice test out of. The change element determining whether the individual knows a particular fact. Specific tricks or techniques of dealing with the particular test materials. Level of practice on the specific skills involved (esp. in psychomotor tests: specific to particular test items. Most of the time we are interested in the stable and general individual characteristics (factor 1 from above).
