[R-sig-ME] r crossed nested random effects lme4

[audusseau jean]

Dear all,I try to find the appropriate model for the following data set with lme4:
Each individual subject goes through 3 conditions ("Group", within-subject factor). These 3 conditions include 9 items (3 items in each condition, but the items differ in each condition). Score (4th column not represented above) is a continuous dependant variable (reaction time).I am interested in the fixed effect of the "Cond" variable and also would like to take into account the dependencies between my factors, but I have difficulties to know if my factors should be considered as nested or crossed.Does the following model seems correct to you ?Score~1+Cond+(1|Subject)+(1|item).Any help would be much appreciated.


-------------- next part --------------
A non-text attachment was scrubbed...
Name: 1530169904311blob.jpg
Type: image/png
Size: 13883 bytes
Desc: not available
URL: <https://stat.ethz.ch/pipermail/r-sig-mixed-models/attachments/20180628/f4eb6e27/attachment.png>