Vinnie gets on the bathroom scale every morning, and according to the scale he weighs about the same each time. If the scale is accurate, it can be said to have ______.
A) internal consistency
B) external consistency
C) construct validity
D) test-retest reliability

Question

Quizplus · Accepted Answer

The fact that Vinnie's weight remains the same each time he weighs himself suggests that the scale has test-retest reliability. Test-retest reliability refers to consistency of results over time, and this is demonstrated by the scale consistently reporting the same weight for Vinnie. The other options are not applicable in this scenario, as internal consistency refers to the consistency of responses within a single test, external consistency refers to consistency across different tests or measures, and construct validity refers to whether a measure accurately assesses the underlying construct it is intended to measure.

Vinnie Gets on the Bathroom Scale Every Morning, and According