What is the optimal item-difficulty level for a true-false item?
A) .500
B) .625
C) .755
D) 1.000
Correct Answer:
Verified
Q45: An item-difficulty index can range from
A) 0
Q46: The higher the item-difficulty index,the _ the
Q47: An item-reliability index provides a measure of
Q48: Item-discrimination indexes can range from
A) .001 to
Q49: A negative item-discrimination index results for a
Q51: An item-endorsement index is most likely to
Q52: An item-discrimination index typically compares
A) high scorers'
Q53: In item analysis,the term item endorsement refers
Q54: An item-difficulty index of 1 occurs when
A)
Q55: It is needed to calculate the item-validity
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