Significant results were achieved at the end of this experiment. Watson suggested that human beings are just passive recipients being led by their environment, and our fears and other behavior that we think of as instincts are nothing but the result of such conditioning.
Though the experiment provides significant data to show that fear is only a reflex that is learned, the means to achieve this result can never be justified.
Everything else aside, although individual consent is necessary for someone to participate as a subject in a study, seeing the consent of the mother only as sufficient is completely irrational. Because it was not the mother, but little Albert who had to suffer the consequences of the experiment and it was little Albert who died of distress.