[R] Designs with many periods

[Michael Kubovy]

Dear R-helpers,

Jones & Kenward (2003)¶ discuss balanced designs with many periods  
(p). It is my impression the algorithmic design packages (AlgDesign,  
crossdes, conf.design) in R do not handle cases in which the number of  
treatments (t) is < p. Am I mistaken?

To be concrete: I am designing an experiment with t = 12 in a  
factorial design (3x4) with p = [12,18] (we have our subjects for an  
hour, which allows us about 18 blocks). We can run in the ballpark of  
30 subjects.

Pointers welcome.

_______________________
¶ @BOOK{JonesKenward2003,
   title = {Design and analysis of cross-over trial},
   publisher = {Chapman \& Hall/CRC},
   year = {2003},
   address = {Boca Raton, FL, USA},
   edition = {2nd},
   author = {Byron Jones and Michael G. Kenward}
}

_____________________________
Professor Michael Kubovy
University of Virginia
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