"The probability of endorsing or selecting an item response indicative of higher levels of theta should increase as the underlying level of theta increases." This quote sums up the meaning of the IRT assumption of
A) unidimensionality.
B) heteroskedacity.
C) local independence.
D) monotonicity.

Question

Quizplus · Accepted Answer

Monotonicity is the assumption that the probability of endorsing or selecting an item response indicative of higher levels of the underlying construct (theta) should increase as the level of theta increases.

"The Probability of Endorsing or Selecting an Item Response Indicative