Effects of testosterone on biology and behavior Introduction The 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 levels of hormones increase the likelihood of certain behaviors, and certain behaviors increase the likelihood of changes in hormones. The biosocial model was developed to understand the influences and relationships that the social environment, biology, and behavior have with each other and how they interact to influence each other. Biology influences the type of behavioral response a person has to the social environment. At the same time, that behavioral response influences the physiological reaction the body has to that stimulus. This environmental stimulus induces those behaviors that make the internal biology of our body react. Therefore, each of the three variables, social environment, behavior or biology, can cause a change in the others. When 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 the extent to which each factor influences the other. How much does testosterone affect aggression or risky behaviors such as smoking, sexual promiscuity or alcohol abuse? As researchers get closer to finding these answers, they are also getting closer to discovering how to treat and counsel people about these types of activities. In this study, several hypotheses are made about the testosterone hormone and its relationships with biology, health and social behaviors. On average, you...... middle of paper...... Testosterone collections should also be done in both sexes when subjects are not sexually stimulated, while they are sexually stimulated, for example while watching a video sexual, and after stimulation. In this way we could better understand the relationship between testosterone and sexual behavior. For a study on aggression/antisocial behavior, subjects (male and female) should be administered a questionnaire specifically addressing hostile and rebellious behavior. Collection of testosterone samples should be done when subjects are in their baseline state (not exposed to stimulation), when they are faced with a situation that might warrant aggression, such as an argument, and collected after the situation has finished. These types of studies could give researchers a better understanding of these relationships, as well as the relationships testosterone has with other behaviors.