How can I be sure that my customised 360 degree feedback questionnaire is reliable and valid?
There are many different types of reliability and validity. Ideally, a customised questionnaire should have established scale reliability (e.g., Cronbach’s alpha) to ensure that the questions are accurately measuring a single concept. It would also be useful to know whether the customised questionnaire had acceptable test re-test reliability. Validity is also important for 360 degree feedback questionnaires. There are many different types of “validity” so it is easy to be confused when someone says that their 360 degree feedback tool is “valid.” Minimally, a customised questionnaire should have “face validity” so that participants and raters tend to believe that the questions and competencies are relevant to the purpose and goals of the feedback process. It is possible to establish face validity by running a focus group with a representative group from within your organisation, or by piloting the 360 degree feedback questionnaire before a wider roll-out. It is important to establish wh
