 TM and Cult Mania analyzes the efficacy or lack thereof of the TM meditation process , concluding that it is , " no more effective than many other meditation techniques " . The authors write that , " Transcendental Meditation has achieved international recognition through commercial exploitation " and " poor scientific procedures " . The book notes that physiological changes observed due to partaking in TM methodology are very small . Persinger , Carrey , and Suess conclude in TM and Cult Mania , " science has been used as a sham for propaganda by the TM movement . " 
