Expectancy-value theory (Eccles et al., 1983) is a prominent approach to explaining gender differences in math-related academic choices, with value beliefs acting as an important explanatory factor. Expectancy-value theory defines 4 value components: intrinsic value, attainment value, utility value, and cost. The present study followed up on inconsistencies in research findings on gender differences in math values that might partially be due to differences in the operationalization of the value construct. To this end, we examined if subfacets of the 4 value components could be established empirically and if gender differences could be found on these facets. A total of 1,868 9th-grade students completed a set of 37 items assessing their value beliefs in mathematics. Confirmatory factor analyses supported the conceptual differentiation of value beliefs into a total of 11 value facets. Whereas the factor structure was invariant across gender, there were considerable differences in mean levels favoring boys on some but not all value facets. These gender differences depended not only on the value component but also on the specific facet under consideration.

Interventions targeting students' perceived relevance of the learning content have been shown to effectively promote student motivation within science classes (e.g., Hulleman & Harackiewicz, 2009). Yet, further research is warranted to understand better how such interventions should be designed in order to be successfully implemented in the classroom setting. A cluster randomized controlled study was conducted to test whether ninth-grade students' value beliefs for mathematics (i.e., intrinsic value, attainment value, utility value, and cost) could be fostered with relevance interventions in the classroom. Eighty-two classrooms were randomly assigned to 1 of 2 experimental conditions or a waiting control condition. Both experimental groups received a 90-min intervention within the classroom on the relevance of mathematics, consisting of a psychoeducational presentation and relevance-inducing tasks (either writing a text or evaluating interview quotations). Intervention effects were evaluated via self-reports of 1,916 participating students 6 weeks and 5 months after the intervention in the classroom. Both intervention conditions fostered more positive value beliefs among students at both time points. Compared with the control condition, classes in the quotations condition reported higher utility value, attainment value, and intrinsic value, and classes in the text condition reported higher utility value. Thus, stronger effects on students' value beliefs were found for the quotations condition than for the text condition. When assessing intervention effects separately for females and males, some evidence for stronger effects for females than for males was found.

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Drawing on expectancy-value theory, the present study examined the unique contributions of the four major value beliefs and self-concept on achievement, self-reported effort, and teacher-rated behavioral engagement in mathematics. In particular, we examined the multiplicative effects of self-concept and task values on educational outcomes using the latent moderated structural equation approach. Participants were 1,868 German ninth-grade students. The data analyses relied on a higher-order structure of value beliefs, which is suited to parsing the differential patterns of predictive relations for different value beliefs. The findings revealed that (a) self-concept was more predictive of achievement, whereas value beliefs were more predictive of self-rated effort; (b) self-concept and value beliefs emerged as equally important predictors of teacher-reported engagement; (c) among the four value beliefs, achievement was more associated with low cost, whereas effort was more associated with attainment value; and (d) latent interactions between self-concept and value beliefs predicted the three outcomes synergistically.