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...n four different occasions. Once I get a significant ANOVA, I first run a paired samples t-test using the code: t.test(X1,X2,paired=TRUE) #being x1 the punctuation after treatment 1 and x2 the punctuation after treatment 2. After this, I run a Tukey posthoc test for repeated measures as stated in gribblelab: require(nlme) a1<-lme(x~factortmnt,random=~1|factorid/factortmnt,data=mydata) print(anova(a1)) require(multcomp) summary(glht(a1,linfct=mcp(factortmnt="Tukey"))) The fact is that once I get both results, there are some occasions in which I get lower p values with Tukeys correction...

...n an Anova.mlm object generated by the Anova function of the car package. I have defined a multivariate linear model and subsequently performed a repeated measures ANOVA as per the instructions in section #3 of the following comprehensive tutorial on the subject from the Gribble lab at UWO: http://gribblelab.org/2009/03/09/repeated-measures-anova-using-r Unfortunately, since my data has missing values,I can't seem to use the classical univariate approaches of aov() or lme() (suggested in sections #1 and #2 of the tutorial linked to above). The relevant portions of the R console output are copied b...

Hello everyone, I've conducted a Type III repeated-measures ANOVA using Anova() from the car package, based on the suggestions at http://blog.gribblelab.org/2009/03/09/repeated-measures-anova-using-r/(option 3) and http://languagescience.umd.edu/wiki/EEG#ERP_ANOVA_in_R. My ANOVA has two factors: Condition (3 levels) and Region (6 levels) and their interaction. Below is code to run the Anova and get the model object (the data are at https://docs.goo...

Hola a todos, Acudo a vosotros después de darle muchas vueltas al tema en Internet y no localizar la solución para algo que creo trivial. Necesito aplicar el test de Quade a un conjunto de datos en el que existe más de una covariable. El ejemplo de dicho test en R es el siguiente: ## Conover (1999, p. 375f): ## Numbers of five brands of a new hand lotion sold in seven stores ## during one week. y

...must be misunderstanding something here. Can someone point out what is happening? Thanks, -Paul -- Paul L. Gribble, Ph.D. Associate Professor Dept. Psychology The University of Western Ontario London, Ontario Canada N6A 5C2 Tel. +1 519 661 2111 x82237 Fax. +1 519 661 3961 pgribble@uwo.ca http://gribblelab.org [[alternative HTML version deleted]]

...se les monitoreó la concentración celular en el tiempo (en horas). Para determinar si existe diferencia significativa en la concentración celular en los diferentes tiempos necesito aplicar un anova de medidas repetidas, lo que estoy haciendo con la siguiente instrucción (tomado de http://blog.gribblelab.org/2009/03/09/repeated-measures-anova-using-r/): # Modelo medidas repetidas: library(nlme) modelo.medidas.repetidas <- lme(CONCENTRACION_CELULAR ~ TIEMPO, random = ~1|REPETICIONES/TIEMPO, na.action = na.exclude, data = DATOS) ¿Es adecuado aplicar el modelo de esta forma para realizar un ano...

Dear R Help, I have a general question - I know this is the R list, but I hope someone can help me out a little as I've always found the help here to be absolutely fantastic. I have run a psychological study where participants are given multiple stimuli and their responses to those stimuli are measured on the same numerical scale, i.e., the data is something like Participant Stimulus

...ing epsilon), or is it up to me to write my own function? Thanks in advance for any suggestions, -- Paul L. Gribble, Ph.D. Associate Professor Dept. Psychology The University of Western Ontario London, Ontario Canada N6A 5C2 Tel. +1 519 661 2111 x82237 Fax. +1 519 661 3961 pgribble@uwo.ca http://gribblelab.org [[alternative HTML version deleted]]

Unsubscribe -----Original Message----- From: r-help-request at r-project.org Date: Wed, 05 May 2010 12:00:09 To: <r-help at r-project.org> Subject: R-help Digest, Vol 87, Issue 5 Send R-help mailing list submissions to r-help at r-project.org To subscribe or unsubscribe via the World Wide Web, visit https://stat.ethz.ch/mailman/listinfo/r-help or, via email, send a message with subject