Table 1 Means and Standard Deviations for Age and Competitiveness Score: Measure China Japan United States Total M SD M SD M SD M SD Age, yr. Women 21.2 1.8 20.6 0.1 19.6 1.6 20.3 1.5 Men 20.8 0.8 20.1 1.0 20.6 1.6 20.4 1.2 Total 21.0 1.4 20.4 1.0 20.0 1.6 Enjoyment of competition Women - 29.3 7.1 27.6 6.2 31.2 9.4 29.4 8.0 Men 30.8 8.1 30.1 6.2 36.6 6.4 32.1 . 7.1 Total 30.1 7.6 29.0 6.3 33.4 8.7 Contentiousness Women 14.4 4.4 14.8 3.0 14.7 4.6 14.7 4.0 ' Men 15.6 4.1 14.5 3.1 15.9 4.4 15.1 3.7 Total 15.0 4.2 14.6 3.0 15.2 4.6