1962: Southern Alps
61 days... Resurfaced 17th Sept... Believed it was 20th August!!
1975: Texan Cave
6 months... Circadian rhythms settle to around 24 hours... BUT would sometimes be as much as 48h's!!
1999: 'Affects of Age'
60 years old... Internal clock ticked more slowly than when a young man...Sleep patterns changed also.
- All showing evidence for a free-running internal clock... (endogenous pacemakers)
Support: Aschoff and Weaver (1976)
Aschoff and Weaver (1976)
Underground WWII bunker... No enxternal cues!!
Most ppts had circadian rhythms between 24-25 hours...
Showing that the cycle operates without external cues..
BUT Some participants showed rhythms of as much as 29 hours!!
- Showing that maybe the internal clocks is inaccurate without external cues