Less is more. Make your point briefly and stop, unless you want to bridge to another topic. If you are not brief, your response will be edited, which can distort the meaning. Don't be fooled by silence. Sometimes reporters remain silent at the end of your remarks, hoping you will continue, possibly stumbling into information you'd just as soon not share.
Most reporters are generalists.
Their knowledge about Purdue, higher education issues and your research is limited. Sometimes they have been briefed for only a few minutes. Consequently, reporters often don't know the best questions to ask and don't mind if you subtly help rephrase or redirect their questions. For example, if the question is about drinking on campus, you may be able to respond by focusing on efforts at Purdue to discourage drinking. Repeat important points, especially for sensitive or controversial issues.