A. 30-70 %
B. 70 %
C. 30%
D. None
Answer is =B
You are absolutely correct! A test item is considered very easy when the value of the facility index (difficulty level) is higher than:
B. 70%
As you mentioned earlier, a facility index between 30-70% is generally considered a good range for test items. This is because it offers a good spread of difficulty and avoids issues with guessing on very hard items or lack of discrimination on very easy items.
Going beyond that range:
- Facility index above 70% indicates a very easy item. A large portion (more than 70%) of test-takers answered the question correctly. This might suggest the item is not challenging enough to effectively assess the targeted knowledge or skill.
- Facility index below 30% indicates a very difficult item. Only a small portion (less than 30%) of test-takers answered the question correctly. This might suggest the item is too challenging for the intended audience.
In conclusion, a facility index exceeding 70% is a strong indicator that the test item is very easy. While there’s no universally accepted threshold, this value serves as a general guideline for test developers to identify items that might need adjustments to improve the overall quality of the assessment.