Educational Psychology / Unit 12 EDP 1106 short lesson, about 20 seconds
Construct Evidence
Captions available
The idea
Construct evidence asks whether performance reflects the intended construct, the ability the test means to measure, rather than construct-irrelevant factors such as English proficiency, anxiety or reading speed.
In practice
A math word test that English learners fail because of vocabulary measures English as much as math.
Where people slip
Construct-irrelevant factors lower validity even when scores are consistent.
Your place on the trail
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