This is beneficial for science because it is taking existing experiments into a new field and therfore you have more opportunities to develop new research methods. There may be new outcomes because there are new questions being asked. Because of this enquiry I am helping and growing the scientific community. 

As a team this target audience already has a starting point or benchmark to measure their progress against. For example you may know what their abilities were before the experinment and could compare. 

I would conduct convenience sampling on my basketball team members and other teams that would like to get involved.   

** remember to say why the other sampling methods would not work!

Given the target audience is under 18 they would need parental consent in order to participate - the parents would know what the experiment’s goals are. 

There would be a debrief at the end - after you had collected the data you would tell the participants what was happening.  You would protect the individual outcomes and not share individual results with them or anyone else. Results are confidential. In the debrief you would check that the participants were all in the same if not better headspace than when they started the experiment.  I would run a quick survey on how they are feeling before and after participation.

Would make sure that those that did not receive praise were not impacted negatively. Offer support if needed.

** What about protection from harm? Or protection from stress? By not praising you may be doing some hardcore damage..