Hi Sonal I would agree with the others that when you have so few response options, radio buttons are preferable over drop downs. This is because the radio buttons expose the options to the user and require one less 'click'. The only reason you might choose to use a drop down regardless is because of limited space.
With regards to the question about whether or not to include a 'don't know' option, Chauncey is spot on. The point is whether don't know is a valid response for any of your users, given the question. I recently wrote an article on chosing response options for closed questions (i.e. just what you are doing). You might find it useful: http://formulate.com.au/articles/closed-question-response-categories/ Best, Jessica Enders Principal, Formulate Information Design http://formulate.com.au . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Posted from the new ixda.org http://www.ixda.org/discuss?post=32523 ________________________________________________________________ Welcome to the Interaction Design Association (IxDA)! To post to this list ....... [EMAIL PROTECTED] Unsubscribe ................ http://www.ixda.org/unsubscribe List Guidelines ............ http://www.ixda.org/guidelines List Help .................. http://www.ixda.org/help
