[R] R: Re: Differences in output of lme() when introducing interactions

2015-07-23 Thread John Maindonald
1-lug-2015 11.58 A: "angelo.arc...@virgilio.it<mailto:angelo.arc...@virgilio.it>"mailto:angelo.arc...@virgilio.it>>, mailto:bgunter.4...@gmail.com>> Cc: mailto:r-help@r-project.org>> Ogg: Re: R: Re: [R] R: Re: Differences in output of lme() when introducing interactions

[R] R: Re: Differences in output of lme() when introducing interactions

2015-07-22 Thread angelo.arc...@virgilio.it
Dear Terry, I am very grateful to you for such a detailed and helpful answer. Following your recommendation then I will skip the method presented at http://www.ats.ucla.edu/stat/r/faq/type3.htm So far, based on my understanding of R I arrived to the conclusion that the correct way to see if ther

Re: [R] R: Re: Differences in output of lme() when introducing interactions

2015-07-20 Thread Bert Gunter
I believe Michael's point is that you need to STOP asking such questions and START either learning some statistics or work with someone who already knows some. You should not be doing such analyses on your own given your present state of statistical ignorance. Cheers, Bert Bert Gunter "Data is

[R] R: Re: Differences in output of lme() when introducing interactions

2015-07-20 Thread angelo.arc...@virgilio.it
Dear Michael, thanks for your answer. Despite it answers to my initial question, it does not help me in finding the solution to my problem unfortunately. Could you please tell me which analysis of the two models should I trust then? My goal is to know whether participants’ choices of the depend