Multiple choice grading policies
The points of multiple choice exercises comes from the task. If the tasks is asigned 3 points, and multiple choice will have 2 correct answers, you will get 1.5 points per correct option. This will differ depending on the grading policy you've picked for the exercise. You can't get any negative points from multiple choice exercises.
There are three grading policies available for multiple choice exercises.
These are All correct, none incorrect, Reduce points from incorrect options and Reduce points from incorrect and unselected answers.
You get points only when you choose all of the correct options and nothing more.
Example: There's three options a, b and c. Correct options are a and b. If you choose a and b, you get points. If you choose anything else besides these two, you won't get any points.
Each correct option will give you a point, and each incorrect option will reduce you a point.
Example: There's three options a, b and c. Correct options are a and b. If you choose a and c, you will get a point from a but because c is incorrect you will lose the point you gained from a. If you choose a but don't choose anything else, you will get a point from the exercise.
Each correct option will give you a point, and each incorrect option, or unselected correct option will reduce you a point.
Example: There's four options a, b, c and d. From these a and b are correct. If you choose only a and don't choose b, you will get a point from a but you will also be reduced a point since you didn't pick b resulting you in zero points. If you chose a, b and c you will get one point because you would get two points for choosing a and b, but a point is reduced from you, because you chose incorrect option c.
You get full points for any combination of correct answers and if none of the incorrect answers are selected.
Example: There's three options a, b and c. Correct options are a and b. If you choose a and/or b, you will get full points from the exercise. If you choose c, you will get zero points from the exercise, even if the correct answers are also selected.
- Policy: all correct, none incorrect
- Max points: 2
- Answer options: 5 total (2 correct, 3 incorrect).
- Points per correct answer option: Every correct option has to be selected to get the maximum 2 points. Impossible to receive 1 point.
Policy is set to all correct, none incorrect. Student has select both correct options (A, B) but also an incorrect option (C) and does not receive any points for the exercise.
Student has to select both correct options (A, B) to receive max points from the exercise. (Note: If the student had only selected one of the two correct options (and none of the incorrect ones), the student would have received zero points.)
- Policy: Reduce points from incorrect options
- Max points: 3
- Answer options: 5 total (3 correct, 2 incorrect).
- Points per correct answer option: 3 points / 3 correct answer options = 1 point.
Policy Reduce points from incorrect options is selected. Student receives one point per correct option selected (max points: 2 / number of correct options: 2 = 1 point). Each wrong option selected cancels out one correct answer option selected. Here the student has selected both correct options, but one incorrect: 1 point (correct option A) + 1 point (correct option B) - 1 point (incorrect option C) = 1 point. (Note: Even if the student had selected the every option (2 correct, 3 incorrect), the total score would have been 0 as negative points are not awarded.
- Policy: Reduce points from incorrect options
- Max points: 2
- Answer options: 5 total (4 correct, 1 incorrect).
- Points per correct answer option: 2 points / 4 correct answer options = 0.5 points.
Student has selected all correct options (A-D) but also the incorrect option (E). Points for one correct option is cancelled out: 0.5 (A) + 0.5 (B) + 0.5 (C) + 0.5 (D) - 0.5 (E) = 1.5 / 2 points.
- Policy: Reduce points from incorrect and unselected options
- Max points: 3
- Answer options: 4 total (3 correct, 1 incorrect).
- Points per correct answer option: 3 points / 3 correct answer options = 1 point.
Student has selected two correct options (A, B), but has left a correct option unselected (C) and selected one wrong option (D). Points from the two correct answer options are cancelled out by the unselected and wrong answer options: 1 (A) + 1 (B) - 1 (C, unselected) - 1 (D, wrong) = 0 points.
