How do I view item statistics?

The Item Statistics report feature provides educators, test administrators, and item creators with detailed analytical data on item performance. Analyzing item performance assists in improving the quality and effectiveness of assessments.

1. Navigate to the Content Bank.

2. In the Items window, select an item in the menu on the left of the interface.

3. To view the item’s statistics, select Item Statistics.

The report displays two tables with different metrics for analyzing the item:

Table 1. Executions

The Executions table displays the following details on the item’s executions:

• Number of executions: The number of times the item’s interaction was executed by a test taker.

• Correct: How many times the item’s question was answered correctly.

• Incorrect: How many times the item’s question was answered incorrectly.

• Skipped responses: How many times the item was skipped by test takers.

Table 2. Performance Statistics

The Performance Statistics table offers generated calculations on the item’s difficulty and discrimination:

• Difficulty: Percentage of correct answers out of the total number of executions for the item.

• Discrimination: The ability of a test question (or item) to differentiate between high-performing and low-performing test-takers. Discrimination measures how well an item distinguishes between individuals who have a high overall ability or knowledge in the subject being tested and those who do not.