Assessing Measures
1) some measures simple, easy to assess like gender.
2) the more complicated the measure the more complicated assessment.
3) Assess scales based on Classical Test Theory
Reliability-
How consistency does the scale measure the concept it says it measures.
1) reliability assessed by determining how much transient error is in the measure.
2) relatively simple concepts measured by one question are probably subject to less transient error, such as gender. We rarely assess their reliability.
3) more complex concepts measured with a number of questions (items) with greater error. Several ways to assess reliability of scales.
4) test-retest
5) alternate form
6) interrater/interjudge reliability
7) split half techniques assessing internal consistency
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