Cronbach’s Alpha: How to Check Your Questionnaire’s Reliability Step-by-Step
Why Your Questionnaire Needs a Reliability Check You have spent weeks designing your questionnaire. The questions sound right, your supervisor nodded approvingly, and your pilot respondents finished it without complaining. But one question still hangs in the air: do your items actually measure the same thing, consistently? That is exactly what Cronbach’s alpha answers. It …