A well-known measure of general self-efficacy — confidence in one's own ability to achieve what one sets out to do — across four items.
7-point Likert (1=strongly disagree, 7=strongly agree)
Su, L., Monga, A.B., & Jiang, Y. (2021). How Life-Role Transitions Shape Consumer Responses to Brand Extensions. Journal of Marketing Research, 58(3), 579–594.
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