With simple grading peers that have no marks awarded still seem to get a decent grade.

[Kevin Moore]

Setup an assignment using the 'simple' grading. Get one of the peers (A) provide a grade to another peer (B) When the tutor assigns a grade of 100 to the assignment, the calculation gives B the grade of 100 (as expected) but the other students who received no grades still get 93.35 for example.

This feels wrong...

[Kevin Moore]

The grade is calculated in locallib.php():peerassessment_get_simple_grade() for the example above an ungraded users average mark is 0 and the calculation becomes 100 + ( 0 - 1.33)*5

This happens regardless of the number of peers who have provide grades.

[Kevin Moore]

Simple grading is no longer used.