Essentially in a study where there is a pre-test, then an intervention and a post-test (Identical tests), I have a question:
"Do students who perform better on the skill test before the intervention also perform better on the skill test after the course?"
And I am at a loss for where to start or how to go about this sort of an analysis...
Well people that get 100% on the pretest often also get 100% on the posttest and hence show no improvement with the intervention. Is that what you are asking?
Best, David Booth
Sophie,
I, and perhaps David Eugene Booth , are not quite sure what your question is. I am having trouble not seeing this as a question to which we already know the answer; maybe I miss the point.
The only other issue I would like to point out is that, because you have selected Ss due to their extreme pre- score, you are subject to a regression effect.
My best,
John
LIke David Eugene Booth and John Morris , I am not sure what you are asking, but if I am reading it as intended you might look up regression towards the mean/median.
Thank you both so much for your answers!
I think I had actually confused myself and what I needed to do was find a way to see if pre-test scores could be predictive of post-test scores, I used a regression for that...
I really appreciate your answers and time,
Thank you both again!
- Badges
- Science topic