PARSCALE

Author: Eiji Muraki & Darrell Bock
Contact: https://vpgcentral.com/software/scientific-software-international/
Description: This most versatile of all IRT rating-scale programs now includes adjustments for differences in rater severity. PARSCALE 4 now includes: * DIF of rating scale items * Handles up to 15 categories * User options for Samejima's graded response model generalized to rating scales or Master's partial credit model with or without discriminating power parameters. * Allows mixtures of rating scale items and multiple-choice items with or without guessing. * Handles multiple subtests and weighted combinations of subtest scores.
Analyses: DIF; Item & Test Analysis; Reliability; cheating detection
System Requirements: Windows
Measurement Model: IRT/Rasch
License Type: Commercial
Documentation: manual in PDF; online help system