Content Validity and Reliability
Door Andrew Roben
1. Validity: Does the test measure what it is supposed to measure? (Kubiszy & Borch, 2010 p. 329)
1.1. Criterion Validity
1.1.1. Concurrent Criterion Related Validity: Is there a correlation with widely accepted tests?
1.1.2. Predictive Criterion Related Validity: Can the test predict future scores?
1.2. Content Validity
1.2.1. Measures what it says it measures
1.2.2. Does it match the instructional objective?
2. Reliability: Does the test yield the same or similar scores consistently? (Kubiszy & Borch, 2010 p.329)
2.1. Internal consistency
2.1.1. Do students consistently get the same answer on similar questions?
2.1.2. Two Halves Method: Split the test into equal halves and analyze the outcomes
2.2. Test-Retest or Stability
2.2.1. Is there correlation between multiple test groups?
2.3. Alternate Forms or Equivalance
2.3.1. Do the scores of two equal tests administered to different groups correlate?