NotesFAQContact Us
Collection
Advanced
Search Tips
Publication Date
In 20250
Since 20240
Since 2021 (last 5 years)0
Since 2016 (last 10 years)0
Since 2006 (last 20 years)1
Descriptor
Comparative Testing1
Construct Validity1
Item Analysis1
Item Response Theory1
Mathematical Concepts1
Multidimensional Scaling1
Nonparametric Statistics1
Regression (Statistics)1
Simulation1
Statistical Analysis1
Source
Educational and Psychological…1
Author
Azen, Razia1
Schmitt, Thomas1
Walker, Cindy M.1
Publication Type
Journal Articles1
Reports - Research1
Education Level
Audience
Location
Laws, Policies, & Programs
Assessments and Surveys
What Works Clearinghouse Rating
Showing one result Save | Export
Statistical versus Substantive Dimensionality: The Effect of Distributional Differences on Dimensionality Assessment Using DIMTEST
Peer reviewed Peer reviewed
Direct linkDirect link
Walker, Cindy M.; Azen, Razia; Schmitt, Thomas – Educational and Psychological Measurement, 2006
It is believed by some that most tests are multidimensional, meaning that they measure more than one underlying construct. The primary objective of this study is to illustrate how variations in the secondary ability distribution affect the statistical detection of dimensionality and to demonstrate the difference between substantive and statistical…
Descriptors: Multidimensional Scaling, Item Response Theory, Comparative Testing, Statistical Analysis