Miller and Stark (2002) argued that worldwide tendencies for males to be less religious than females must have a physiological foundation. In the same year, Stark (2002) proposed that males are more prone to risk taking than females (thereby becoming less religious) due to their higher testosterone levels. The present study was undertaken to assess the merits of these proposals using questionnaire data obtained from Malaysian and U.S. college students. Seven religiosity traits were factor analyzed into a single factor, two risk‐taking traits were averaged into a single variable, and five traits were factor analyzed into two factorial measures of androgens. The usual gender differences in religiosity and risk taking were confirmed. However, contrary to Miller and Stark's suggestion, risk taking was not found to be inversely correlated with religiosity. Regarding the two androgen factors, most of the findings were inconsistent with Stark's proposal that negative correlations would be found. Aside from females being more religious and less prone to take risks than males, most of the other theoretical ideas offered by Miller and Stark were not supported by findings from this study.