in Watson’s lab at John Hopkins. Other factors such as Watson’s good looks and his interest in human sexuality (that he was not private about) also made this story believable. However, these evidences are not strong enough to conclude that Watson have been conducting sexual research using himself and his graduate student. This could be why many psychology books have left this part out from the Watson chapter.
I agree with the authors that it was right for many introductory psychology textbooks to leave this part out from psychological textbooks. I am sure there were many “gossip” worthy events in many great men/women’s life, but that shouldn't be conveyed to students (to read or to be tested on). In the case of Watsons, firstly, the evidences were not strong enough to support the story. Without clear evidence, it just looks like a gossip printed in textbooks (unless the stronger evidence provides details about research that can be used for future research). Secondly, even if stronger evidence was available it still shouldn’t be part of textbooks. When discussing influential people, the focus should be about what they did professionally and what it has to do with their field. If the goal is to provide examples of ethical violations/ research misconducts in the past, one can simply give general examples of the types of misconduct done without providing names.
As for Watson’s story, I am not sure what to think about the story – weather I believe it or not. There really doesn't seem to be any strong evidence that it happened. Then again, he did burn a several of his personal documents toward the end of his career.