Table 2. Correlations between major variables.

1, negative rearing 2nd year; 2, negative rearing 3rd year; 3, negative rearing 4th year; 4, social withdrawal 2nd year; 5, social withdrawal 3rd year; 6, social withdrawal 4th year; 7, aggression 2nd year; 8, aggression 3rd year; 9, aggression 4th year.

^**P<0.01.