David Rosenhan conducted a famous experiment where mentally healthy individuals presented at mental hospitals saying they were hearing voices. All were admitted with the diagnosis of schizophrenia & kept for an average of 19 days, despite acting normally once they were admitted. Have a watch of the video below for more info. This study questions the validity of diagnosis by the experts.
Is this relevant today?
When is it ok to question the experts? Can it be applied to different settings?