Title page for ETD etd-033199-230118


Type of Document Master's Thesis
Author Swander, Carl Joseph
Author's Email Address cswander@vt.edu
URN etd-033199-230118
Title Assessing the Differential Functioning of Items and Tests of a Polytomous Employee Attitude Survey
Degree Master of Science
Department Psychology
Advisory Committee
Advisor Name Title
Harvey, Robert J. Committee Chair
Donovan, John J. Committee Member
Foti, Roseanne J. Committee Member
Keywords
  • DFIT
  • DIF
  • Attitude Assessment
  • IRT
  • Differential Item Functioning
Date of Defense 1999-03-22
Availability unrestricted
Abstract
Dimensions of a polytomous employee attitude survey were examined for the presence of differential item functioning (DIF) and differential test functioning (DTF) utilizing Raju, van der Linden, & Fleer's (1995) differential functioning of items and tests (DFIT) framework. Comparisons were made between managers and non-managers on the 'Management' dimension and between medical staff and nurse staff employees on both the 'Management' and 'Quality of Care and Service' dimensions. 2 out of 21 items from the manager/non-manager comparison were found to have significant DIF, supporting the generalizability of Lynch, Barnes-Farell, and Kulikowich (1998). No items from the medical staff/nurse staff comparisons were found to have DIF. The DTF results indicated that in two out of the three comparisons 1 item could be removed to create dimensions free from DTF. Based on the current findings implications and future research are discussed.

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