These entrainment results appear to be significantly less dramatic than those allegedly documented by the CIA's entrainment study[1] in 1983.<p>1: <a href="https://www.cia.gov/readingroom/docs/CIA-RDP96-00788R001700210016-5.pdf" rel="nofollow">https://www.cia.gov/readingroom/docs/CIA-RDP96-00788R0017002...</a>