<p>I don’t like your whole study, and I’ve been trying to figure out why.</p>
<p>After all, to be fair to you, it should be perfectly OK for you to investigate anything you want.</p>
<p>I think I’ve figured out what’s bothering me. Focusing on the results of your study would tend to emphasize the differences among the three groups, but I think the differences between individuals in each group are likely to be more important to academic success – and that people need to focus more on those individual differences rather than the group ones.</p>
<p>But as I said, you can, of course, study whatever interests you.</p>