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How to check if the interaction term is significant?

Ben Bolker · 2014-07-27T19:43:22Z

geetha venkatesh writes: > > Dear lmer users, > > I am using this package for the first time. I have a very basic question > and I hope I can clarify my doubt. I would like to check if the interaction > between two variables is significant. If I use two models, one with > interaction term and the other without interaction and run a anova test, > does this make sense? > > m1=lmer(res~variant*age+sex+(1|batch)) > m2=lmer(res~variant+age+sex+(1|batch)) > > anova(m1,m2) > >

Ben Bolker

Sun, Jul 27, 2014 12:43 PM

geetha venkatesh <geetha.r.v at ...> writes:

Yes; this runs a likelihood ratio test.  It is an asymptotic
test; you may want to consider the alternatives in the pbkrtest
package for other kinds of tests, but the basic idea is the same.

  Ben Bolker

Thread (2 messages)

geetha venkatesh How to check if the interaction term is significant? Jul 27 Ben Bolker How to check if the interaction term is significant? Jul 27