Complex sentence: The Rosenhan experiment was an experiment conducted to determine the validity of psychiatric diagnosis, conducted by psychologist David Rosenhan, a Stanford University professor, and published by the journal "Science" in 1973 under the title "On being sane in insane places".
Split into simpler sentences: The Rosenhan experiment was an experiment conducted to determine the validity of psychiatric diagnosis. The study was conducted by psychologist David Rosenhan, a Stanford University professor, and published by the journal "Science" in 1973 under the title "On being sane in insane places".