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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