“Sixty subjects listened to a 60-s sample of glossolalia (defined to them a pseudolanguage) and then attempted to produce glossolalia on a 30-s baseline trial. Afterward, half the subjects received two training sessions that included audio and videotaped samples of glossolalia interspersed with opportunities to practice glossolalia. Also live modelling of glossolalia, direct instruction, and encouragement were provided by an experimenter. Both the trained subjects and untreated controls attempted to produce glossolalia on a 30-s post-test trial. About 20% of subjects exhibited fluent glossolalia on the baseline trial, and training significantly enhanced fluency. Seventy percent of trained subjects spoke fluent glossolalia on the post-test.”

Taken from ‘Glossolalia as Learned Behaviour: An Experimental Demonstration” Journal of Abnormal Psychology, 1986, Vol. 95 No. 1, 21-23.