Advertisement - Members don't see this ad
1) Did you do research that contributed to the information presented on the poster/presentation? Did you help author the poster/abstract? Is your name on the abstract? If yes, then you have every right to claim this as your intellectual property, regardless of whether you went to the conference. If your role was very tiny, I wouldn't blame you for not mentioning it. But if that is not the case, then you could cite it. You would state who did present the information, giving due credit, with some indication that you were not present. However . . . (exception below that seems to apply to you)1) If my name is listed on an abstract that was presented at a conference that I wasn't there for, should I bother listing it? I don't want to get to the interview and be asked, "So! how was that conference?" and have to say "... that wasn't me..."
2) Related to that same abstract, I have a non first-author publication that has been accepted pending minor revision (so there isnt a specific accept date I could list just yet). Should that go in a separate slot or should I put that in the activity description for the corresponding research experience? (If it matters, I also presented a poster on that research as well, but it wasn't anything major.)
2) One should only cite the most prestigious way in which one's data was presented to the world. Apparently, in this case, that way will be under the Publications designation, rather than Poster/Presentations (provided it's via a noncampus journal).
An Acceptance pending minor revision is considered an Acceptance for AMCAS purposes, and can be listed under Publications. The date you'd enter would be the date of notification. In the entry, you will specify the status, namely, Accepted pending minor revision. After the citation, in the same space, you may enter the information that the data was also presented at xxxConference, on xx/xx/xx date, by first author, So N So, and the same for the Poster. Cite abstract and poster enough that your place on the author lists is evident. Always give credit to others when it is due.
Hopefully, this approach will free up some space for you.