2
$\begingroup$

In my experiment I compare the jump height of participants pre and post 2 separate interventions.

All participants completed baseline measures of jump height. Participants then underwent a training intervention followed by post test measurements. On a separate occasion the same participants completed a different intervention before post test measurements were taken.

I believe I should use paired t-tests to compare these groups as the same participants were tested pre and post. However, I also want to compare the post test scores from intervention 1 with the post test scores from intervention 2 (to see if there were significant differences between the two interventions).

Is there a test I should use to achieve this in one? Or do I use the paired t-tests for pre and post comparisons and a further test for the post-post comparison?

Thanks in advance!

$\endgroup$
  • 1
    $\begingroup$ I'm not clear on the experiment. All participants were exposed to the two interventions? So for the 'post-post' analysis you are comparing the difference between having just one intervention as opposed to the same people having both interventions. $\endgroup$ – Simon Apr 24 '17 at 3:40
  • $\begingroup$ I think a repeated measures ANOVA would be appropriate in your case. I'm make the assumption that @Simon asks about above, that all participants experienced both interventions. $\endgroup$ – mkt - Reinstate Monica Aug 1 '17 at 11:46
-1
$\begingroup$

Sorry, I'm new to the network. I do not know which statistical program you use, I use SPSS. If I understood correctly (I'm not native to the language) you have three measures of the same individuals. If your data have a normal distribution, if there is homogeneity of variances and if the variances of the three measurements are not different (p> 0.05) you can use Anova for repeated measures.

$\endgroup$
  • 4
    $\begingroup$ This is a definite improvement, but you still should try to explain/justify your answer in more detail, If you can, please edit $\endgroup$ – Glen_b -Reinstate Monica Apr 24 '17 at 4:12

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.