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Block factor as random or fixed effect?

Rob Knell 
People

I apologise for asking a general stats question, but I'm at a bit of a  
loss as to what to do following some hostile referees' comments. If I  
have a fully randomised blocked design, with only three blocks, should  
I treat block as a random or fixed effect? I have read comments about  
not treating block as a random effect if the number of blocks is less  
than 6 or 7: is this right?

Any advice much appreciated

Rob Knell


School of Biological and Chemical Sciences
Queen Mary, University of London

'Phone +44 (0)20 7882 7720
Skype Rob Knell

Research: http://webspace.qmul.ac.uk/rknell/

Thread (3 messages)

Rob Knell Block factor as random or fixed effect? May 13 Robert A LaBudde Block factor as random or fixed effect? May 13 Ben Bolker Block factor as random or fixed effect? May 13