In the context of college admissions, the current study examined whether differential prediction of first‐year grade point average (FYGPA) by gender could be explained by an omitted variable problem—namely, academic discipline, or the amount of effort a student puts into schoolwork and the degree to which a student sees him/herself as hardworking and conscientious. Based on nearly 10,000 college students, the current study found that differences in intercepts by gender were reduced by 45% with the inclusion of academic discipline in a model that already included high school grade point average (HSGPA) and ACT Composite score. Moreover, academic discipline resulted in an additional 4% of variance accounted for in FYGPA. Gender differences in slopes were not statistically significant (p > .001) regardless if academic discipline was included in the model. The findings highlight the utility of taking a more holistic approach when making college admission decisions. Namely, the inclusion of noncognitive measures has benefits that are twofold: increased predictive validity and reduced differential prediction.

We derived an index of high school academic rigor (HSAR) by optimizing the prediction of first‐year college GPA (FYGPA) based on high school courses taken, grades, and indicators of advanced coursework. Using a large data set and nominal parameterization of high school course outcomes, the HSAR index capitalizes on differential contributions across courses and nonlinear relationships between course grades and FYGPA. Test scores from eighth grade were incorporated in the model to isolate the contribution of HSAR. High school courses with the largest relationships with FYGPA were English 11, English 12, Chemistry, English 10, Calculus, and Algebra 2. Participation in Advanced Placement, accelerated, or honors courses increased HSAR. The correlation of the HSAR index and FYGPA was .52 and the HSAR index led to modest improvement in overall prediction when combined with high school GPA and ACT Composite score. HSAR index subgroup differences were smaller than subgroup differences in ACT Composite score. Implications for high school counselors, researchers, and postsecondary student service personnel are discussed.

We examined the role of six psychosocial factors (PSFs) in explaining gender gaps in English Composition (n = 8,633) and College Algebra (n = 2,261) using data of first-year female (55%) and male students from 42 colleges. Using a multilevel model and controlling for prior achievement, we found that PSFs mediated between 3% and 41% of the gender gap in English Composition, but only one PSF (Academic Discipline), helped explain the gender gap in College Algebra. Gender gaps significantly narrowed when students were more motivated to turn in homework assignments in a timely and consistent manner, meet deadlines, and obtain satisfactory academic achievement. These findings may help stakeholders prepare students for success in these foundational college courses.