Given an ideal test item in which 100 percent of the ten students in the high scoring group answer correctly and 20 to 25 percent of the ten students in the low scoring group select each of the four alternatives. An index of discriminating power of .80 for a test item means that it
A) has an ideal level of difficulty
B) has satisfactory discriminating power
C) is too easy for most students
D) should be revised or eliminated

Question

Quizplus · Accepted Answer

An index of discriminating power of .80 indicates that the item effectively differentiates between high and low scorers, showing it has satisfactory discriminating power.

Given an Ideal Test Item in Which 100 Percent of the Ten