Effects of Testosterone on Biology and BehaviorIntroductionThe study of the interaction between hormones and behavior is truly complex. It would be simple if it were true that hormones directly cause behavior. We know that the relationship between hormones and behaviors is reciprocal. Higher hormone levels increase the likelihood of certain behaviors, and certain behaviors increase the likelihood of hormonal change. The biosocial model was developed to encompass the influences and relationships that the social environment, biology, and behavior have with each other, as well as how they interact to influence each other. Biology affects the type of behavioral response a person has to the social environment. At the same time, this behavioral response influences the body's physiological reaction to this stimulus. This environmental stimulus induces behaviors that trigger the internal biology of our body to react. Therefore, any of the three variables, social environment, behavior or biology, can cause change in others. By applying this model to behavioral endocrinology, the relationship between hormones, behavior, and the social environment is examined. It is important to study these relationships to try to determine how each factor affects the other. To what extent does testosterone influence aggression or risky behaviors such as smoking, sexual promiscuity or alcohol abuse? As researchers get closer to these answers, they get closer to how to treat and advise people about these types of activities. In this study, several hypotheses are formulated about the hormone testosterone and its relationships with biology, health and social behaviors. On average, the ...... middle of paper ...... Testosterone collections taken in both sexes should also be collected when subjects are not sexually stimulated, while they are sexually stimulated, by example while watching a sexual video, and after stimulation. In this way, the relationship between testosterone and sexual behavior could be better understood. For a study on aggressive/antisocial behavior, subjects (male and female) should receive a questionnaire specifically addressing hostile and rebellious behavior. Collection of testosterone samples should be done when subjects are at a baseline level (not exposed to stimulation), when faced with a situation that could warrant aggression, such as an argument, and collected once the situation ended. These types of studies could better allow researchers to better understand these relationships, as well as the relationships that testosterone has with other behaviors..