Effect of Performance Data During a Training Session

Are there any studies that show the effect that performance measures have on a training session when the data is shared with the athlete during the training session?

Last week I talked to a researcher who looked at two groups, both were measured, and in one group the data was shared with the athletes during the training sessions. He reports that when the data was shared with the athletes during the training, they were able to better maintain their performance level through the training sessions, while the other group would fall off more rapidly. Unfortunately, they are perhaps a year from publication.

Any pointers to similar studies would be greatly appreciated.

Best,
Christopher