validity
DESCRIPTION
to make your test acceptable--it needs to be valid.TRANSCRIPT
ValidityBy
Jean DJ. Naval
Why evaluate tests?• To make sure that a test measures the skill,
trait, or attribute it is supposed to measure• To yield reasonable consistent results for the
same individual• To measure with reasonable degree of
accuracy
A good test must first of all be valid.
Validity• Refers to the extent to which a test
measures what it purports to measure.• Does the measure what it is suppose
to measure?
TYPES OF EVIDENCE
• CONTENT-RELATED VALIDITY- the adequacy and representativeness of
learning outcomes to be measured.- is assessed by systematically comparing a
test item with instructional objectives to see if they match. Content validity evidence does not yield a numerical estimate of validity evidence.
TYPES OF EVIDENCE
• CRITERION-RELATED VALIDITY– Is established by correlating test scores with
an external standard or criterion to obtain a numerical estimate of validity evidence.
TYPES OF CRITERION-RELATED VALIDITY EVIDENCE
1. Predictive Validity- involves the use of criterion and a predictor.
- determined by correlating test scores with a criterion measure collected after a period of time passed.2. Concurrent Validity- use the general average of the students.
- determined by correlating test scores with a criterion measure collected at the same time.
TYPES OF EVIDENCE• CONSTRUCT-RELATED VALIDITY
- Refers to how well a performance on a particular set of tasks or components can be explained in terms of some psychological construct or trait.
-determined by finding whether the test results corresponds with scores on other variables as predicted by some rationale or theory.
TYPES OF EVIDENCE• CONSTRUCT-RELATED VALIDITY
- Refers to how well a performance on a particular set of tasks or components can be explained in terms of some psychological construct or trait.• DISCRIMANT VALIDITY
- shows a certain psychological test correlated little or not at all with the construct under consideration.
• The adequacy of validity evidence depends on both the strength of the validity coefficient and the purpose the test is being used for.
• Group variability affects the strength of the validity coefficient.
• Validity Coefficient should be considered in terms of the relevance and the reliability of the criterion or standard.– A correlation coefficient
Principles In Interpreting Validity