In the context of twin studies, how do researchers typically differentiate between the influences of nature and nurture on temperament?

In twin studies, researchers look at identical twins, who share 100% of their genes, and fraternal twins, who share about 50% of their genes. By comparing the similarities in temperament between these two types of twins, scientists can see how much of our personality comes from our genes (nature) and how much comes from our environment (nurture). For example, if identical twins have very similar temperaments even when raised apart, it suggests that nature plays a strong role. On the other hand, if fraternal twins show more differences in temperament, it indicates that nurture might be more influential. This way, researchers can better understand how both genetics and environment shape who we are.