What if the Cronbach's Alpha of a scale (4-items) measuring a control variable is between the .40 -.50 in your research. However, the scale is the same scale used in previous research in which the scale received a Cronbach's Alpha of .73.
Do you have to make some adjustments to the scale or can you use this scale because previous research showed it is reliable?
What do you think?
Hi Lisa,
can you be more specific? Which control variable is it and what are the items (question wordings).
Apart from that, you will have differences due to mere sampling fluctuation (but in most cases, the assumptions underlying alpha are simply wrong and the estimate downward biased).
HTH
--Holger
Thank you for your answer Holger Steinmetz
The items measure self-perceived media literacy skills:
1. I would follow the news using multiple media sources.
2. I would contact with news organizations to show my reaction and tell my criticism
3. I would exchange information with my family or friends about the news I see on Facebook.
4. I would caution people around me about the negative sides and negative effects of media.
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