February, 2003
© 2000, 2001
Scott S. Emerson, M.D., Ph.D.
ASSERTION:
Interpretability of boundary scales
The concept
of an error spending scale is less relevant to clinical
researchers
·Type I error
reflects only statistical evidence
·May conflict
with scientific importance
-Underpowered
studies: Failure to reject the null in the face of large estimates
of treatment effect
-Overpowered
studies: Rejection of the null hypothesis when differences are scientifically
unimportant
·