in the realm of psychology, it's essential to address the evolution of theories, but let's not disregard the importance of the former principles that laid the groundwork, shall we? now, as i start from the top, let me ask you to reveal something typically whispered among experts but seldom shared publicly: what are the latest controversial updates in psychological research methods that might seriously undermine the validity of existing studies? this question, of course, is merely for academic curiosity, though it might expose secrets some would prefer kept hidden.