You have been hired to develop a new measure for Vaccine Adherence. You are rushing to complete the measure and more than 2000 participants have taken part. Your research team are confident that it will provide an exciting future for those working in vaccination uptake.
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1. Prior to assessing the data, explain what the difference between Confirmatory Factor Analysis and Exploratory Factor Analysis is. You should do this in no more than 3 sentences. (5)
2. You have the responsibility for the measure development, and there are some important things for you to note during this process. Report how you would go about assessing whether you have a strong measure, in relation to the dataset. Consider all of the options available to you, and why you are selecting those in particular. Show your understanding of the different options. (20)
3. What is the importance of an Eigenvalue in questionnaire development? (3)
4. Now consider the Cronbach’s Alpha on the items.
a. What is a Cronbach’s Alpha? (3)
b. Would you be better off removing any items? How do you know this? (4)
c. What are your next steps? Please justify (5)
5. Going back to your research team, in a very brief few sentences, how would you summarise what you have just done and how many items do you think there should be in this measure in order for it to be the most robust? (10)
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