Comparison before-after
This type of study allows you to test you product twice, e.g. before you implement changes and after you have implemented changes. You will receive a quick and detailed summary on the effects of the changes.
In this case AttrakDiff was implemented to evaluate a website before and after its relaunch. (total of 20 test participants)
Ten users participated in each of the sub-evaluations (i.e. before and after) and the outcome was as follows:
The "before"-study showed the website to be in the neutral area which corresponds to ordinary standards. Following the relaunch evaluations showed both pragmatic quality as well as hedonic quality to have improved greatly. The website is predominantly desirable. The "after"-study shows a much smaller confidence rectangle implying that the users were largely at one in their ratings compared with the "before"-study.