Oral presentation (See Oral Presentation Guidelines (pdf) )
A good abstract provides an idea of why the original research this paper is based upon provides an added value to the conference and the ongoing dialogue in the field. It is obviously not easy to squeeze the research of an entire PhD thesis into a few lines. You will need to focus on one specific angle, answering four straightforward questions:
a) What is the problem you address?
b) What method(s) do you use to research this problem?
c) What data have you been able to produce or process?
d) What (intermediary) findings will you be able to discuss?
In answering these four questions in a succinct manner, the usual 200 to 300 words of an abstract are quickly used up.
And take your time! A good abstract is not written in just a few minutes. Even experienced researchers prefer to go over it several times.