Glossary of statistical terms

Statistical Glossary

Additive effect:

An additive effect refers to the role of a variable in an estimated model. A variable that has an additive effect can merely be added to the other terms in a model to determine its effect on the independent variable. Contrast with interaction effect.

Browse Other Glossary Entries



Want to learn more about this topic?

Statistics.com offers over 100 courses in statistics from introductory to advanced level. Most are 4 weeks long and take place online in series of weekly lessons and assignments, requiring about 15 hours/week. Participate at your convenience; there are no set times when you must to be online. Ask questions and exchange comments with the instructor and other students on a private discussion board throughout the course.


Introduction to Structural Equation Modeling

This course covers the fundamental concepts and theory of Structural Equation Modeling:  model specification, model identification, model estimation, model testing, and model modification.  Reading assignments, examples and exercises are included using the LISREL software package.


Advanced Structural Equation Modeling

This course covers many popular advanced SEM models with practical exercises. Models covered include Multiple Indicator and Multiple Causes models (MIMIC), Multiple Group models, Multilevel (HLM) models, Mixture models, Structured Means models, Multitrait-Multimethod models, Second Order Factor models, Interaction models, and Dynamic Factor models.



Back to Main Glossary

Promoting better understanding of statistics throughout the world

To celebrate the International Year of Statistics in 2013, we will provide a statistical term every week, delivered directly to your inbox. The Institute for Statistics Education offers an extensive glossary of statistical terms, available to all for reference and research. Make it your New Year's resolution to improve your own statistical knowledge! Sign up here. Rather not have more email? Simply bookmark our home page and check our “Stats Word of the Week” feature.
Want to be
notified of future
course offerings?
Please enter first name.
Please enter last name.
Please enter valid E-mail.
© Statistics.com 2004-2014