Contrasting groups tool

Author: Assessment Systems Corp.
Contact: http://www.assess.com/contrasting-groups-tool/
Description: A cutscore that is not empircally evidenced is not legally defensible. There are several accepted methods for setting a valid cutscore, and one of these is the contrasting groups method. It has the advantage over others in that it can be used in a purely data-driven way, in addition to being used with subject matter expert (SME) ratings. The goal of the contrasting groups method is to evaluate how test scores predict some sort of gold standard in classifying examinees. One example is a practice test. Suppose you are delivering a practice test for a national certification exam. You have 100 people take your test, and you also gather their Pass/Fail results from the national exam. Naturally, people who score higher on your exam are more likely to pass. We want to find the cutscore on your exam that best predicts this. The Contrasting Groups Tool allows you to paste in the test scores and the “gold standard and then recommends a cutscore from both a mimimized-error and smoothed-distribution perspective.
Analyses: Item & Test Analysis; Reliability
System Requirements:
Measurement Model: Classical
License Type: Freeware
Documentation: