Make the Questionnaire Easy to Fill Out and Compile

Design the questionnaire for the ease of both yourself (in analyzing the responses) and the participants (in having to remember their history), by avoiding open-ended questions. Have the participants check off boxes or circle answers. This will also minimize their time filling out the questionnaire (important if they will be filling it out the day of the test) and will decrease the number of unintelligible answers. You may want to automate the questionnaire by using a survey tool or other online form maker.