Re: [R] equivalent of repeated measures anova using lmer
asudar aruna.sudarshan at gmail.com writes: I am trying to run a linear mixed effects model similar to the 2*2*2 anova design. My DV is reaction time and fixed factors are time (pre vs. post:within-subject), condition (congruent vs. incongruent: within subject) and stimulation (vertex vs. DLPFC: between subject) My concerns are: a)I have very few participants: 7 in the vertex condition and 7 in the DLPFC condition. b)2 out of the 7 participants participated in both vertex and DLPFC condition. How do I compute a nested lmer model with reaction time as DV and time, condition and stimulation as factors? and how do i account for random intercepts and slopes with few number of participants? Thanks for all the help You'll probably get more useful answers to this question on the r-sig-mixed-mod...@r-project.org mailing list. 7 participants is small but doesn't seem horribly small (but it might preclude estimating a full random-slopes model). You'll get more information on r-sig-mixed-models ... __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] equivalent of repeated measures anova using lmer
I am trying to run a linear mixed effects model similar to the 2*2*2 anova design. My DV is reaction time and fixed factors are time (pre vs. post:within-subject), condition (congruent vs. incongruent: within subject) and stimulation (vertex vs. DLPFC: between subject) My concerns are: a)I have very few participants: 7 in the vertex condition and 7 in the DLPFC condition. b)2 out of the 7 participants participated in both vertex and DLPFC condition. How do I compute a nested lmer model with reaction time as DV and time, condition and stimulation as factors? and how do i account for random intercepts and slopes with few number of participants? Thanks for all the help -- View this message in context: http://r.789695.n4.nabble.com/equivalent-of-repeated-measures-anova-using-lmer-tp4711265.html Sent from the R help mailing list archive at Nabble.com. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
