Sample size calculations for mixed effect (repeated measures)

[John Feiner]

I have tried to use the "power repeated meanspec, corrspec [power(numlist) options]" command, but cannot fathom the instructions for the "corrspec" There is just not enough detail to know what the command needs, even using the menu instead of the command line. Anyone use this before?

[Roman Mostazir]

Have a look at the first example of the power repeated manual. The 'corrspec' is the postulated average correlation between measures.