| MicroFACT for Windows- Factor Analysis for Dichotomous and Ordered Polytomous Response Data |
Niels G. Waller, University of Minnesota, Minneapolis, Minnesota
MicroFACT is an easy-to-use factor analysis program that can
tackle mainframe size problems on your PC — quickly! Version 2.0
includes WinMFact, a Windows interface that allows you to build control files by
point-and-click and run your analyses! Also included in version 2.0
is an enhanced DOS version of the program that runs the command files
created by the Windows interface, or command files that you create independently
with a text editor. Version 2.0 also has many other new features.
MicroFACT provides a methodologically defensible and computationally
efficient method for factor analysis of both dichotomous and polytomous
data sets. Using virtual memory, it can handle analyses of data sets of
any size. For dichotomous (i.e., correct/incorrect or keyed/non-keyed)
data, MicroFACT can assist you in verifying the dimensionality of your
test (which is one of the most basic assumptions of the application of
item response theory models). Assessing the dimensionality of a test can
be accomplished using a factor analytic approach if appropriate computations
are employed. The linear factor analysis model as typically implemented in most
statistical packages, however, often fails to use the appropriate measures of
correlation for such a factor analysis (tetrachoric correlations). MicroFACT
makes it easy to analyze the interrelationships among your test items to
determine the number of underlying dimensions. MicroFACT is simple to use
and provides detailed (but understandable) results.
For the factor analysis of other types of data, such as polytomous data
(i.e., ordered categorical data such as that found in surveys in the social
sciences, political science, education, and behavioral sciences, and clinical
measures used in medical, psychological and personality research), MicroFACT
allows the uses of polychoric correlations, which represents a dramatic step
forward in overcoming the biased results produced by the linear factor analysis
model. MicroFACT also handles continuously scored and ipsatized item response data.
New Features in version 2
- MicroFACT can be called from another program to perform Monte Carlo simulations.
- Data may be written to external files to make simulations easier to
conduct.
- New rotation options: weighted varimax, Harris-Kaiser ortho-oblique, and
Oblimin.
- The ability to rotate from random orientations to avoid local minimum
problems.
- Can import factor pattern, structure, and factor intercorrelation matrices
from previous analyses or published studies.
- New model evaluation features include residual plots, goodness-of-fit
indices, and hyperplane counts for rotated factors -- structures and
patterns.
- New factor loading plots.
- Greater user control of output format.
- New factor score plots.
- Improved error handling routines.
- A complete electronic manual provided as a PDF file, plus on-line Windows Help files.
The Build Menu of WinMFact, with status indicators to help you keep track of your progress
as you create a command file
System Requirements
Windows 95, 98, NT, ME, 2000, XP
Demonstration Version
- This is a fully functioning version of MicroFACT 2.0 that is limited to the analysis of a maximum of 30 variables.
- A free copy of the MicroFACT manual is included as a PDF file. You will need the Acrobat Reader to read this file. If you don't already have Acrobat Reader it can be download HERE. (10.5
MB)
Books on Factor Analysis
Also see our selection of other books on Multivariate Analysis
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