I have an issue with this study. It reads as though the cognitive activity they did throughout the training period is the same as the cognitive test used at th

I have an issue with this study. It reads as though the cognitive activity they did throughout the training period is the same as the cognitive test used at the beginning and the end for measurement. Wouldn’t a person doing the same test for several weeks perform better than a person who experienced the test once? Are we sure they just didn’t get better at the test at the end by practicing vs actually improving cognitive performance that would help them other than taking these specific tests (psychomotor vigilance and stroop).