Assessment Exam - Item Analysis-Reports on Discrimination Index

Video Transcription

way to look at discrimination index is if you go to question report and go to discrimination index there's actually multiple reports that you can run against your exam to calculate  reports on discrimination index so for example suppose we want to look at the 2019 exam and we're just going to run a histogram and let's make the histogram a little bit  narrower so here is actually a histogram of all your questions  broken down by their discrimination index so you can see that you have two questions that  has a fairly high discrimination index you also have two questions that has discrimination index  that's less than zero which actually means that good student actually get it wrong more likely than bad student getting it right so and if you use oasis to write the questions  you can actually click on the two and then you will be able to see you will be able to see  exactly who wrote the question so here you can see that these are the two questions that has a  discrimination that's slightly less than zero and they actually know the author that wrote them  so you can actually grab the data and then maybe the author that tends to write questions that has  a low quality you might just want them to skip the next round of question writing whereas if  you click on here and these are the two authors that definitely write some good questions and  you probably want to make sure that they're invited in the next round so as you can see here not only can you run a histogram of the discrimination index against your exam you  can also find out who wrote them if you're using oasis to write the questions and just decide  which question writers to invite back next year

Video Summary

This video explains how to analyze and evaluate discrimination index in exams using a question report feature. The discrimination index helps identify questions that are poorly written or biased. By running a histogram on the 2019 exam, the video demonstrates how to visually analyze the distribution of questions based on their discrimination index. It shows that there are both high and low discrimination questions, with negative discrimination suggesting that good students answer wrongly more often than bad students. Using Oasis, the video highlights the ability to identify the authors of questions with low or high discrimination, allowing for informed decisions on inviting certain authors for future question writing.

Meta Tag

Creation Year 2019

Keywords

discrimination index

question report feature

exam analysis

histogram analysis

question authors

Question Rating