[Solved] Validity refers to ______. A) research designs B) measurement instruments C) researchers' personalities D) participants' intentions Adolescent Egocentrism: A characteristic of adolescent thought that involves difficulty distinguishing between their perception of what others think about them and what people actually think in reality. Moral Reasoning: The process of determining the difference between right and wrong in a given situation, based on ethical principles and values. Child Sexual Abuse: Any erotic activity that arouses an adult and excites, shames, or confuses a child, whether or not the victim protests and whether or not genital contact is involved. Puberty: The period during which adolescents undergo physical and hormonal changes that lead to sexual maturity.