An Introduction to the Generalized Graded Unfolding
Model and the GGUM2004 Software Package
Instructor: James S. Roberts
Department of Measurement, Statistics and Evaluation
University of Maryland
29. - 30. July 2004
The workshop will be held from Thursday 1 pm to Friday 1 pm
at the:
IPN - Leibniz Institute for Science Education
Olshausenstr. 62
D- 24098 Kiel
Germany
This workshop will introduce attendants to the
Generalized Graded Unfolding Model (GGUM) developed by
Roberts, Donoghue and Laughlin (2000, Applied Psychological
Measurement). The GGUM is a unidimensional item response
model that unfolds graded responses like those obtained
with common attitude and rating scales. The workshop will
include both didactic and "hands-on" components. The
didactic component will review the distinctions between
cumulative and unfolding models, introduce the GGUM and the
various models nested within it, briefly examine how model
parameters can be estimated, and describe how model results
are interpreted. The "hands-on" component will introduce
attendants to the new GGUM2004 software package. GGUM2004
is a Windows-based program that estimates parameters of the
GGUM, calculates statistical indices of item and model fit,
and provides real-time graphics to aid model diagnosis and
interpretation. Attendants will analyze real data sets
under the guidance of the instructor.
Please send inquiries to: Gitta Vosshage
([log in to unmask]).
|