Re: [R] normal distribution assumption for multi-level modelling

2012-04-19 Thread Cecile De Cat
Thanks.   I appreciate this isn't strictly an R question and will pursue on another list. The procedure I followed was inspired from @article{    Author = {Baayen, R. Harald and Milin, Petar},    Title = {Analysing Reaction Times},    Journal = {International Journal of Psychological Research},  

Re: [R] normal distribution assumption for multi-level modelling

2012-04-18 Thread Ben Bolker
Cecile De Cat leeds.ac.uk> writes: > I'm analysing reaction time data from a linguistic experiment (a variant of > a lexical decision task). To ascertain that the data was normally > distributed, I used *shapiro.test *for each participant (see commands > below), but only one out of 21 returns a

Re: [R] normal distribution assumption for multi-level modelling

2012-04-18 Thread Bert Gunter
Cecile: On Wed, Apr 18, 2012 at 8:21 AM, Cecile De Cat wrote: > Hello, > > I'm analysing reaction time data from a linguistic experiment (a variant of > a lexical decision task).   To ascertain that the data was normally > distributed, I used *shapiro.test *for each participant (see commands > be

[R] normal distribution assumption for multi-level modelling

2012-04-18 Thread Cecile De Cat
Hello, I'm analysing reaction time data from a linguistic experiment (a variant of a lexical decision task). To ascertain that the data was normally distributed, I used *shapiro.test *for each participant (see commands below), but only one out of 21 returns a p value above p.0 05. > f = functio