Key points are not available for this paper at this time.
M. Beth Casey, Ronald L. Nuttall, Elizabeth Pezaris, Spatial-Mechanical Reasoning Skills versus Mathematics Self-Confidence as Mediators of Gender Differences on Mathematics Subtests Using Cross-National Gender-Based Items, Journal for Research in Mathematics Education, Vol. 32, No. 1 (Jan., 2001), pp. 28-57
Casey et al. (Mon,) studied this question.