In her article "Hot Tips for Jury Selection," Patricia F. Kuehn writes:
Everyone likes to talk about themselves; give the prospective jurors a chance to talk. When you ask the right questions you provide them the opportunity to give you insight into their attitudes and beliefs. With open-ended questions, the exchange between you and the prospective juror can be conversational. Nevertheless, you still need to obtain some commitments from them. After letting a potential juror talk freely, you may need to follow up with a closed-ended question to obtain a commitment.
According to Kuehn, to find out the most useful information from jurors, you must ask the right questions. More tips and analysis are contained in the article.