Author Topic: Item discrimination  (Read 199 times)

user83

  • Newbie
  • *
  • Posts: 7
    • View Profile
Item discrimination
« on: October 26, 2018, 10:59:33 AM »
Hello, i would like to take a look at the discrimination of test items in a dichotomously scored MC-test (for item selection purposes in piloting the test instrument). I have a multi-matrix design, meaning that students did not work part of the items.Where can i find the discrimination in the itn.file? Is it the "item-total corr." or the "item-rest corr"? Thanks for any help, agrado.


dan_c

  • Administrator
  • Jr. Member
  • *****
  • Posts: 72
    • View Profile
    • Email
Re: Item discrimination
« Reply #1 on: October 26, 2018, 11:12:19 AM »
Have a read of this paper:

https://www.acer.org/files/Conquest-Notes-5-ItemPointBiserialDiscrimination.pdf

There are also some new features for assessing fit using simulation in the next release of ConQuest - watch this space.