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To evaluate an item in a test, we can subtract the number in the bottom group of students who got the item right from the number getting it right in the top group and divide this figure by the total number of papers in the top and bottom group combined. By this procedure, we can understand the ____________________ of the item.
(A) reliability
(B) validity
(C) difficulty level
(D) discrimination level

答案：登入後觀看
難度： 適中
1F
Judith Ho 高一下 (2011/06/11)

鑑別度指數(D)＝高分組答對百分比(ＰH) ─ 低分組答對百分比(ＰL)。




To evaluate an item in a test, we can su..-阿摩線上測驗