- Sign in to Ans.
- Click
**Courses**in the menu on the left. - Select the assignment and click
**Results**in the menu on the left. - Click
**Mark calculation**, on top of the list of students. The pop-up that appears contains several options to change the mark calculation:- Change the
**formula.**Standard, the formula is [1 + 9 ***points**/**total**], where**points**is the number of points obtained by a student and**total**is the total amount of points a student can obtain. Options that are available for this formula:- Math operators: + , - , * , / , ^
- Logic functions: IF, AND, OR
- Comparison operators: <, >, <=, >=, !=, =
- Numeric functions: MIN, MAX, ROUND, ROUNDUP, ROUNDDOWN

Using these operators and functions the following examples can be used:

**Explanation**: The following formula gives an answer of 1 if no points are gathered and increases as a polynomial.**Code**: 1 + 0.026984127 ***points**+ 0.002050265 ***points**^ 2**Explanation**: If total number of points is lower than 45, use*(**points**/ 9) + 1*as marking formula. If total number of points is equal or larger than 45, use*(4 ***points**/ 45)+2*as marking formula.**Code**: IF(**points**< 45, (**points**/ 9) + 1, (4 ***points**/ 45)+2)**Explanation**: The maximum of 0 and**points**minus 28 are compared and subsequently multiplied by 4 and divided by the**total**minus 28. Next, two things are added to this number: the minimum of 28 and**points**multiplied by 5 and divided by 28 and one (so a student will not get a mark lower than 1).**Code**: MAX(0,**points**- 28) * 4 / (**total**- 28) + MIN(28,**points**) * 5 / 28 + 1

- For multiple choice questions, a
**guess correction**can be added. This guess correction is based on a formula by Cohen-Schotanus, but rewritten by W. Bender (2003). This guess correction is only applicable to multiple choice questions, as well for questions with one correct answer as questions with multiple correct answers.- Corrected score = [(
*s-n*g*) / (*n-n*g*)] x*n*

*s*= score for multiple choice questions of the student*n*= maximum score for multiple choice questions*g*= (number of correct answers for multiple choice questions) / (total number of multiple choice answer possibilities)

This formula accounts for the possibility that multiple answers are correct for a multiple choice question by adding the total number of correct answers for multiple choice questions and dividing it by the total number of multiple choice answer possibilities. This way, for one multiple choice questions with 4 answer possibilities of which 2 are correct, the guess correction factor*g*is equal to 1/2 (50%). When more than one multiple choice question is in one assignment, the number of correct answers of all multiple choice questions are added as well as the total number of answer possibilities of all multiple choice questions. The same is done for the score*s*as well as the maximum score*n*of all multiple choice questions. - Corrected score = [(
- The minimum and maximum mark are needed if a bonus or formula is set where a student, in theory, can get higher or lower than the boundaries.
- The rounding of the marks can be determined.
- At last, the threshold can be set. The threshold is the limit at which a student gets a pass or has an insufficient mark. This limit is used for analytics.

- Change the
- Click
**Save**and the marks of the students will be updated automatically.

**What's next?**

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