Problematic design [Design Issues]

posted by Helmut Homepage – Vienna, Austria, 2014-12-24 17:10 (4203 d 13:03 ago) – Posting: # 14164
Views: 20,509

Hi Kumar,

❝ can we keep this set of sequences for such designs.


R   R   T1  T2

R   R   T2  T1

T1  R   R   T2

T2  R   R   T1

T1  T2  R   R

T2  T1  R   R


I asked you already almost one year ago about the purpose of your study. The question ist still open… Your design is extremely imbalanced for period effects:

R : 2×P1, 4×P2, 4×P3, 2×P4
T1: 2×P1, 1×P2, 1×P3, 2×P4
T2: 2×P1, 1×P2, 1×P3, 2×P4

IMHO, you can’t get unbiased treatment effects from this “design” unless all period effects are truly zero.

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