Discrimination value of more than 0.4 means:

The discrimination index measures how well an item differentiates between high-scoring and low-scoring students. A discrimination value of more than 0.4 indicates that the item is good, meaning it effectively distinguishes between students who know the material and those who do not. Higher positive values suggest better discrimination.

• Item is acceptable (B) might be for values between 0.20 and 0.39.
• Item is weak (C) would typically be for values below 0.20.
• Item discriminating negatively (D) occurs when more low-scoring students answer correctly than high-scoring students, resulting in a negative discrimination index.