A. Item is good
B. Item is acceptable
C. Item is weak
D. None
Answer is = B
That’s right! In the context of item analysis, a discrimination value of more than 0.4 indicates that the item is B. Item is good.
Here’s why:
- Discrimination value: This is a statistical measure used in educational assessments to analyze the ability of a test question (item) to differentiate between high-performing and low-performing students.
- Interpretation of discrimination value:
- A discrimination value closer to 1 (e.g., 0.70 or higher) suggests a strong ability to differentiate, indicating a very good item.
- A discrimination value of around 0.4 is considered acceptable, indicating the item can adequately differentiate between student performance levels.
- A discrimination value closer to 0 (e.g., 0.10 or lower) suggests the item has weak discriminating power, meaning it may not effectively distinguish between high and low performers.
Therefore, a discrimination value of more than 0.4 signifies that the item can effectively differentiate between students with different levels of knowledge or ability, making it a good item.