[R] repeat(?) measurement ANOVA or (general? mixed?) linear model?
wolfgang.waser at utu.fi
Wed Oct 7 17:28:31 CEST 2009
after browsing the archives for hours I'm still not sure about the proper
analysis for my dataset.
I subjected each of about 50 critters (about 10 each in 5 distinct
populations) to 4 consecutive treatments (exposure to increasing
concentrations), with one measurement per treatment and individual.
I, of course, want to know, if there was a treatment and / or a population
Since I'm dealing with 'paired' data, and also with a (expected) 'linear'
response to a 'linear' treatment, how do I perform the proper analysis?
I tried something like:
but I don't see, how these formula would differentiate between a 'paired'
or 'unpaired' experimental design. Somewhere in the archives it was mentioned
that you could use the error-term to make that distinction (Baron-rpsych.pdf,
but, unfortunately, that level of sophistication is still beyond my
Any advice on the matter would be very much appreciated
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