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...d the 64 bit version in Unix) and mgcv (both version 1.7-10 and 1.7-6). In my (simplified) model predicting pronunciation distance I'd like to include a random slope per Participant for a binary value (IsDem) which stores a word-specific characteristic. I load the data (available at http://www.martijnwieling.nl/dat.csv) and run the model as follows: > library(mgcv) # version 1.7-10, but problem also occurs with earlier versions (e.g., 1.7-6) > dat = read.csv('dat.csv',header=T) # data available at: http://www.martijnwieling.nl/dat.csv > dim(dat) # the original dataset is larger, but t...

...ii) how I can link the random slopes which are present to the correct labels of the words? (I did not include the model as it is >300 MB in size, but let me know if this is necessary.) Any help would be greatly appreciated! With kind regards, Martijn Wieling University of Groningen http://www.martijnwieling.nl

...caused by a decrease of the edf's of splines in the model with the interaction). In this case, how would I proceed in determining if the model including the interaction term is better? With kind regards, Martijn Wieling -- ******************************************* Martijn Wieling http://www.martijnwieling.nl wieling at gmail.com +31(0)614108622 ******************************************* University of Groningen http://www.rug.nl/staff/m.b.wieling