how to test the effect of an intervention how soon after intervention is spss tested how long after intervention to see differences how long is a post intervention follow up what time period do participants test exercise using spss how long after intervention for an exercise test when to do repeated measures in spss how do you find the differences in groups in repeated measures? how many months after intervention does an exercise test have to be compared when do you compare a group and test in a rct what is the difference between a time point of intervention and an intervention what time do the groups compare in the rct versus the control how to compare time points in rct how to test for group differences in randomised controlled trial when is exercise compared during a rct? does sps work in a rct what is the difference between groups in a rct/control study do spsa analyses of randomised control trial work how to compare groups at different time points in a rct when to do a sput compared test