Questions: Begin open questions with often useful who, what, when, where, and why. Closed questions may start with do, is, or are. Could, can, or would questions are considered open, but have the additional advantage of being somewhat closed, thus giving more power to the client, who can more easily say that he or she doesn't want to respond
Predicted Result: Clients will give more detail and talk more in response to open questions. Closed questions may provide specific information.