Quiz and question statistics

You can get statistical analysis for quiz results and for specific test questions.

 

1. Open the quiz page and go to the "Results" tab. In the menu, select "Statistics":

 

2. A page with a statistical report of the quiz will open:

 

 

3. At the bottom of the page you will find a table of all the questions.

 

 

4. Click on the name of the requested question and you will be taken to a page summarizing the statistical analysis of that question. At the top you can see a general summary:

 

 

And in the lower part, each of the distractors is given (a row for each distractor):

 

 

 

Further explanations of the available statistical indicators can be seen here. https://docs.moodle.org/dev/Quiz_statistics_calculations.

 

The statistical results of a multiple-choice test

In a multiple-choice test, it is recommended to refer to two important indicators, which are presented in the statistical results: the facility index and the discrimination index. These indicators allow to assess the quality of the items. The values ​​of both indicators are numbers between -1 and 1 (-100% and 100%), with a higher value being preferable.

Facility Index – The facility index of an item is the proportion of examinees who answered the item correctly. The ideal facility index of a multiple-choice item is not 0.5, but the value between the probability of guessing the answer (the result of a random guess) and 1 (the level of difficulty when everyone answered the item correctly).

Discrimination index – The discrimination index of an item is a quantitative statistical measure that reflects the extent to which an item distinguishes between high-ability examinees and low-ability examinees.

There is no clear standard that defines D values ​​that indicate a good item, but the consensus is that items with D < 0.2 require rework, and items with D > 0.4 have fairly good legibility.

A negative discrimination index sorts out across the entire test, and indicates a problem with the item.

* In the Moodle system, the measures are given in percentages