<p>so... I've done research under 2 professors. 1 for a summer and the other for 2 years. would it be helpful to get both recs, or just 1 will be fine? i really want to get 2... however, if they're both averagish, will excessive PI recs detract from my app? sort of in a predicament here...</p>
<p>Do they say different things? If they’d be repetitive, do not send both. If they’d somehow capture different sides of you (one research depends on responsibility and methodical-ness, maybe, and in the other you’ve had a few flashes of ingenuity?), sure, send both. That said, I think a lot of people will answer that more than one supplemental recommendation is never a good idea.</p>