Re: [R] Using MCMC sampling to estimate p values with a mixed model

2011-06-20 Thread ps0u5145
Hi, Thank you for the replies. Yes I would say it does resemble a randomized block design in that each person completed 4 out of a possible 16 versions/conditions of the vignette. There was approximately 20 responses in each condition. The commands I have been using are; modela -lmer(DV ~

[R] Using MCMC sampling to estimate p values with a mixed model

2011-06-19 Thread Woodcock, Helena
Hi everyone, Apologies if this is a silly question but I am a student and this is my first time using R so I am still trying to educate myself on commands, models e.t.c I have a mixed model with four dichotomous fixed factors and subject as a random factor (as each person completed four

Re: [R] Using MCMC sampling to estimate p values with a mixed model

2011-06-19 Thread Ben Bolker
Woodcock, Helena H.E.Woodcock at liverpool.ac.uk writes: Apologies if this is a silly question but I am a student and this is my first time using R so I am still trying to educate myself on commands, models e.t.c I have a mixed model with four dichotomous fixed factors and subject as a

Re: [R] Using MCMC sampling to estimate p values with a mixed model

2011-06-19 Thread Robert A LaBudde
If your alternative hypothesis is unequal variances (2-sided), both F 1 and F 1 are of interest, and rejection of the equal variance null can occur on either side. The usual ANOVA F test is 1-sided, with an alternative the numerator variance exceeds the denominator one, so this is perhaps

[R] Using MCMC sampling to estimate p values with a mixed model

2011-06-17 Thread ps0u5145
Hi everyone, Apologies if this is a silly question but I am a student and this is my first time using R so I am still trying to educate myself on commands, models e.t.c I have a mixed model with four dichotomous fixed factors and subject as a random factor (as each person completed four