However, when we counted the number of steps infants observed during the training and/or pre-test as an index of visual experience we found that there was no significant correlation between this measure and the amount of sensorimotor alpha suppression at post-test (p >.10).
First, a pre-test (as well as the paired post-test) takes up a non-trivial amount of time.
This yielded a sufficiently high reliability for both subsidized (α = .77) and non-subsidized practices (α = .87) in the pre-test as well as in the post-test (subsidized α = .76, non-subsidized α = .91).91
They explained the aims of the relaxation technique (i.e., to enhance their physical and psychological well-being, and to achieve a greater personal serenity), the reason for the questions they would be asked immediately (pre-test), as well as at the end of the relaxation training, and three months after the study was finished.
To determine the effects of MT-training on behavioral measures in an exploratory manner, we performed analysis of covariance (ANCOVA) of differences using pre-and post-test measures as dependent variables and pre-test scores as independent variables.
Logistic regression was used to analyze change in dichotomous measures, with group and pre-test score as the predictors and follow-up score as the outcome.
A possible solution to this problem is to include some kind of "pre-test" as part of the experiment, which will allow the researcher to select the populations that are most likely to be sensitive to the different treatments.
After receiving their scores, they were asked to choose from one of the gift options from the pre-test as a reward for their participation in the survey.
This approach controls for the baseline level of the pre-test by including the pre-test as a covariate in the model.
To adjust observed measurements for regression to the mean effects we-run the models with the scores at pre-test as covariates.
The secondary continuous outcome measures will be analyzed with repeated measures MANCOVA using the pre-test as a covariate as is recommended for RCT's with pre-, post- and follow-up measurements [ 71].
