The answer is: They found that the correlations for characteristics were very similar, which indicate that genetic factors appear to account for most of the variations in a remarkable variety of human characteristics. However, there are some criticisms to their study. Some studies claim that the researchers did not publish their data as fully, or completely, as they should have. They also claim that the researchers failed to consider all environmental factors, which came up in other studies. The results of the study showed that identical twins, who were raised in different environments, grew into adults that were very similar, not only in appearance, but also psychology and personality.
