In the previous step, you learnt how to view the insights of the objectives used in your digital test. In this step, you will learn how to view the insights of the rank correlation. Analysing the rank correlation of the questions can help determine if your question correlates well to the whole test.
To gain insights into the rank correlation of the questions in your digital test, click on analytics Insights from within your digital test. You will then be brought to the Insight overview page. Click Rank correlation in the box on the left.
How we determine the rank correlation
For the rank correlation we sort participants of the assignment by their final mark and divide them into 5 groups. We then show the average score of each group for that specific question.
If the line in the graph is roughly horizontal, it means that the question was answered just as well by the overall higher scoring participants as by the overall lower scoring participants.
If the line is more ascending, it means that the overall higher scoring participants answered this question better than the overall lower scoring participants, as you would expect for most questions.
Normalised average score
The normalised average score for each participant is divided by the maximum score/number of points for the question.
For the quintile groups, the participants are ordered by their final mark and divided into 5 groups. You will see the average score for each group for this specific question.