Japanese students at HDU; A:3 B:25 C:22, American Students; A: 12 B:21 C:4 ( A&B:28 C:22 vs. A&B:33 C:4 ) significantly different (chi-square=11.18) (A:3 C:22 vs. A:12 C:4) significantly different(chi-square=16.69) ---