Growing up, eric was always favored over his sister by his parents. if this unequal treatment leads to differences in the children's personalities, it would be an example of a (n)

In the given scenario, it is considered to be an unequal treatment in which will likely lead to the children’s differences in their personality that is an example of a non-shared environmental factor because they are not treated the same and that they don’t share the same environment or experience.