Ask open-ended questions. Make sure you get complete answers and that you fully understand responses to your questions. Ask your candidate how she would handle a particular situation if it arose. Let the interviewee talk while you listen. Avoid coming to a conclusion prematurely.
Most interviewers size up the candidate in the first few minutes of a meeting.
With an open mind, your assessment may change over the course of a well conducted interview. Explain job requirements. Ensure that the candidate fully understands the requirements and qualifications of the job. It may help to explain a typical day or week on the job to the candidate. Your job preview should include the undesirable elements of the job as well as the positive ones.