Measuring Comparison Effects: A Critical View on the Internal/External Frame of Reference Model

Abstract

AbstractThe internal/external frame of reference (I/E) model describes the formation of students’ math and verbal self‐concepts by the joint effects of social comparisons (where students compare their subject‐specific achievements with those of their classmates) and dimensional comparisons (where students compare their math and verbal achievements with each other). To date, researchers have examined this model in dozens of studies. However, these studies have overestimated the effects of social comparisons because they did not recognize that the social comparison effects in the I/E model also result from dimensional comparisons. This article aims to explain this misunderstanding by developing the difference I/E (dIff/E) model, which represents the joint effects of social and dimensional comparisons more adequately than the classic I/E model. Specific findings of prior I/E model studies are discussed, which require a reinterpretation or only become plausible in light of this research's insights (e.g., where researchers compared the social comparison effects in the I/E model between groups). Moreover, empirical data are analyzed to provide support for the validity of the dIff/E model. As a key conclusion, researchers should understand that the social comparison effects in the I/E model do not only represent effects of social comparisons.