A test intended to measure a relatively stable trait gives noticeably different scores to the same learners when administered under comparable conditions a few days apart. Which property is primarily in question?

Correct answer: Test-retest reliability Noticeably different scores for the same learners on a stable trait under comparable conditions a few days apart indicate weak test–retest reliability.

• Content validity Content validity concerns how well the items cover the content.
• Criterion validity Criterion validity concerns the relationship with an external criterion.
• Scoring objectivity Scoring objectivity concerns agreement among scorers, not changes in scores over days.