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What is a Good Assessment?Reliable (.70 or better) High Validity: is it believable? Convenient Cost effective and valuable Technical validation available
Reliability:The ability of an instrument to measure consistently with relative absence of error. The higher the reliability coefficient, the more confidence you can have in the score. .90 and up………Excellent! .80-.89………….Good .70-.79………….Adequate Below .70………May have limited applicability Source: Testing and Assessment: An Employer’s Guide to Good Practices U.S. Dept of Labor 1999 Validity:The ability of an instrument to measure what it is intended to measure. What does the instrument measure? How well does it measure it? Test Manuals:“Test manuals should provide a description of the validation procedures used, and evidence of validity, reliability and test fairness.” Source: Testing and Assessment: An Employer’s Guide to Good Practices U.S. Dept of Labor 1999 |
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