George Estabrooks conducted an ESP experiment using cards in 1927. Harvard students were used as the subjects. Estabrooks acted as the sender, with the guesser in an adjoining room. Estabrooks conducted a total of 2,300 trials. When Estabrooks sent the subjects to a distant room with insulation, the scores dropped to chance level. Attempts to repeat the experiment also failed.
george estabrooks conducted an esp experiment using cards in 1927 harvard students were used as the subjects estabrooks acted as the sender with the guesser in an adjoining room estabrooks conducted a total of 2300 trials when estabrooks sent the subjects to a distant room with insulation the scores dropped to chance level attempts to repeat the experiment also failed