Educational Psychology / Unit 13 EDP 1225 short lesson, about 20 seconds
Error in Every Score
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The idea
No score is perfectly precise: the standard error of measurement estimates how much a score would vary on retesting, and a relatively large one indicates relatively low reliability.
In practice
A reported score is best read as a band around the number.
Where people slip
Systematic errors, pushing every score the same way, reduce validity, not reliability.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
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