Eight items measure the extent to which a person is motivated by outperforming others and winning in competitive situations. Chan and Briers (2019) borrowed the Interpersonal Competitiveness subscale from Griffin-Pierson's (1990) Competitiveness Questionnaire, which demonstrated unidimensionality, internal consistency, and several forms of validity in its original development with 326 U.S. MTurk participants.
Chan, E., & Briers, B. (2019). It's the end of the competition: When social comparison is not always motivating for goal achievement. Journal of Consumer Research, 46(2), 351–370.
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