In a secondary study, Rosenhan (1973) informed the staff at a teaching and research hospital that one or more pseudo-patients would attempt to gain admission over a three-month period. Of the 193 genuine patients admitted during this time, 41 were suspected with high confidence of being impostors by at least one staff member, and 23 were suspected by at least one psychiatrist, despite Rosenhan sending no pseudo-patients.
Describe two ways in which the research by Rosenhan (1973) could have been improved.
