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vogz32
12-13-2005, 09:37 PM
Hello all!
can anyone tell me what are the benefits of conducting a post-test only assessment? ( no pre testing)
thanks
-vogz32
JohnM
12-13-2005, 09:52 PM
If your hypotheses, stated before running the experiment/study, call for specific comparisons, then it helps you "cut to the chase" and also in many cases will enhance the power of the statistical tests.

On the other hand, if you have only a general hypothesis, then an overall or "omnibus" test should be done, and if significant, followed up with conservative (i.e., Tukey or Bonferroni) post-hoc tests.
vogz32
12-14-2005, 07:34 PM
If your hypotheses, stated before running the experiment/study, call for specific comparisons, then it helps you "cut to the chase" and also in many cases will enhance the power of the statistical tests.

On the other hand, if you have only a general hypothesis, then an overall or "omnibus" test should be done, and if significant, followed up with conservative (i.e., Tukey or Bonferroni) post-hoc tests.


Thanks for your valued insight!