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Mixed (aka multilevel or hierarchical) models are linear models that include both fixed effects and random effects. They are used to model longitudinal or nested data.

2 votes
0 answers
164 views

Should I include a fixed effect with repeated measures in the random structure of my nested ...

I am doing a longitudinal repeated measures study looking at the effect of age (maturation) on my test result (Y - a type of hearing test). My outcome Y, is numeric, and is tested at 11 frequencies (p …
tauft's user avatar
  • 155
1 vote
1 answer
1k views

Modeling repeated measures with a second layer of nesting using lmer

I am doing a longitudinal repeated measures study looking at the effect of age (maturation) on my test result (Y - a type of hearing test). My outcome Y, is numeric, and the main effect is age (age.gr …
tauft's user avatar
  • 155