To add a Matrix question, go to 'Courses', click on the course name, and edit the respective 'Test Unit' (if you don't have one already, go to 'Add content' -> 'Add test'). In the 'Questions' section, click on 'Add Question' and, from the 'Type' dropdown list, choose 'Matrix'.
By default, your new Matrix question will consist of 2 Rows and 2 Columns.
Click on the 'plus' (+) button (1) to add more Rows and Columns. Each time you do it, both a Row and a Column are added. When you need more Columns than Rows or vice versa, click on the 'plus' (+) button until you reach the desired number. Then, only fill in the required fields and leave the others blank.
Note: Click on 'Create Matrix' (2) anytime you want to preview the changes you’ve made to your grid.
From the 'Score Calculation Mode' settings, you can define which counts as a single correct or incorrect answer in the User’s score, a single checkbox ('Full Matrix') or a whole Row ('Per Matrix Row') (3).
1) The Matrix question below is set to 'Full Matrix' score calculation mode. It consists of 4 Rows, 3 Columns, 12 checkboxes, and 6 correct answers. The possible answers are 12, equal to the number of the checkboxes. One wrong checkbox costs the User 1/12 or 8,33% of the total score.
2) The Matrix question below is set to 'Per Matrix Row' score calculation mode. It consists of 4 Rows, 3 columns, 12 checkboxes, and 6 correct answers. The possible answers in each Row are 3. One wrong checkbox costs the User a whole Row, which translates to 1/4th or 25% of the total score.
While 2 or 3 errors in the same row have the same weight on the results, 2 wrong checkboxes in 2 different rows would cost the User 50% of the total score.
From the 'Reply Mode' settings, you can define whether Users can pick only one ('One Checkbox Per Row') or multiple checkboxes ('Many Checkboxes Per Row') on each Row (4). In the case of 'One checkbox per rοw,' if the users have already selected a checkbox and try to select another one in the same row, the system removes automatically the first selection. In the case of 'Many Checkboxes Per Row' the checkboxes are presented as radio buttons.
Note: To configure the 'Associated Unit', 'Unit Difficulty', 'Seconds to Complete', 'Explanation', and 'Associated Skill' features go to the 'Advanced Settings' section.