Differnce between pre test evalution and post test evalition
Answers
Examining the difference in scores from pre test evaluation to post test in a small sample can be very challenging. It’s important to consider what can be validly determined.
When the samples contain the same individuals and there are about 25 or more individuals in the sample one can use the test of significance call a matched pairs t-test.
If there are fewer than 25, determining if there is evidence of a gain due to training is still possible by examining evidence of a change in evaluation by individual . For each student who took both the pretest and the post test, calculate a difference evaluation for OVERALL and for each of the scale areas.
This is usually the best was to interpret the effects of a training program in any pretest posttest sample, as it allows you to see the magnitude of the change in scores and display this in graphic format