The discrimination index (DI) measures how discriminating items in an exam are – i.e. how well an item can differentiate between good candidates and less able ones. For each item it is a measure based on the comparison of performance between stronger and weaker candidates in the exam as a whole.
Item analysis uses different statistical measures in order to determine any problems with the ‘items’ that make up a question in an exam, and hence the question itself. Are your questions working as they should?
Standard setting is a way to define levels of achievement or proficiency in an exam and the cut-off marks corresponding to those levels. We summarise the methods and advantages of each, as well as where they are most appropriate.
Standard setting is an essential process of delivering assessments. But what actually is standard setting? How do you know whether you are using the right standard setting method? Read the introduction to our standard setting series to become a standard setting guru.