moodle/moodle
3
0
Fork 0
mirror of https://github.com/moodle/moodle.git synced 2025-08-06 01:16:44 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

A little tidy

Browse source
This commit is contained in:
moodler 2003-11-25 13:31:11 +00:00
parent 50368eea89
commit 98516bb40a
1 changed files with 3 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

4
lang/en/help/quiz/discrimination.html
View file

@ -1,6 +1,8 @@
<P ALIGN=CENTER><B>Discrimination Index</B></P>
<P>This provides a rough indicator of the performance of each item. It is calculated by counting the number of students who scored in top third on this quiz for each question and dividing this figure by the number of students who scored in the bottom third. For example, if 30 students took the quiz, there would be 10 students each in the top third and bottom third. If, on item #1, 9 of the best students got it right, but only 3 of the poorest third got it right, the discrimination index would be 9/3 = 3.0. The numbers in parentheses are:(top third correct responses/bottom third correct responses). </P>
<P>This provides a rough indicator of the performance of each item. It is calculated by counting the number of students who scored in top third on this quiz for each question and dividing this figure by the number of students who scored in the bottom third. </p>
<p>For example, if 30 students took the quiz, there would be 10 students each in the top third and bottom third. If, on item #1, 9 of the best students got it right, but only 3 of the poorest third got it right, the discrimination index would be 9/3 = 3.0. The numbers in parentheses are: (top third correct responses/bottom third correct responses). </P>
<P>If the index goes below 1.0 it means that more of the weaker students got the item right than the stronger students. Such items should be discarded as worthless. In fact, they reduce the accuracy of the overall score for the quiz. </P>