If one do the same experiment as the article describe, called the ultimatum game, and tell participants that further players will know about what decision playe

If one do the same experiment as the article describe, called the ultimatum game, and tell participants that further players will know about what decision players makes (reputation), administrating testosterone to players will result in more generosity. However if you tell players that you are giving them testosterone, regardless if it is true or not, it will then make players less generous. Studying human behavior is difficult. It is possible that only women can smell the pheromone, or it can be culture. Its hard to untangle unless one do blind studies.