Validating test items with spss Granies cha freesext
Acquiring this information typically takes multiple studies.
Strictly speaking, a scale or subscale is a group of items selected to measure a particular construct but there is a lot of confusion in the usage of the term “Likert scale” (what Rensis Likert did was indeed combine several items, sometimes with different formats but what many people call a “Likert scale” is in fact an item, not a scale)[email protected] Laurans. Just go on with your research, using them as intended.
Also a brief point of terminology, to help you understand any material you might read on the topic: A question or statement in a questionnaire (but not a group of questions) is what is called an “item”. There are certainly no simple procedure that could give you a number characterizing their “validity” or a binary OK/not OK decision.
after conducting the pilot survey, now i am interested to check whether they are valid or not. If those are standard scales, given in particular the sample size, I would say that it does not make sense to try to run sophisticated analyses to assess their validity.
A researcher has devised a nine-question questionnaire to measure how safe people feel at work at an industrial complex.I guess journal editors and reviewers think that I know what I am doing, or maybe they are deferring to my “expertise” because, like my university professors, they are not sure about what to do.It is kind of strange being called an expert on something that you did not learn from another expert. Nutshell means that I’ve left out a lot of details.I think reporting PCA and CA results on the formal data is most useful.When reporting PCA results you may say something like “Questions 4, 6, 7, 8, and 10 loaded onto the same factor which we determined represents personal commitment to employer.” When reporting CA results you may say something like “The Cronbach’s Alpha for questions representing personal commitment to employer was 0.91, indicating excellent internal consistency in the responses.” Summary of Steps to Validate a Questionnaire.