Educational Psychology / Unit 13 EDP 1224 short lesson, about 20 seconds
Consistency Measured Several Ways
Captions available
The idea
Reliability is consistency, estimated by test-retest, alternate-form and internal-consistency coefficients, the last from split halves, Kuder-Richardson formula 20 or coefficient alpha, and by interrater agreement across scorers.
In practice
Two teachers giving nearly the same scores to the same essays shows high interrater reliability.
Where people slip
More items, clear directions and clear scoring criteria raise reliability.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
Something wrong in this lesson? Flag it · Sources for Educational Psychology