Biopsychology 6/15

Question 1

Siffre study

Answer 1

spent extended periods underground.

Deprived of exposure to natural light and sound, but with access to adequate food and drink.

His biological rhythm settled down to one that was just beyond the usual 24 hours.

Question 2

Aschoff and Wever

Answer 2

Participants spent 4 weeks in a WWII bunker deprived of natural light. All but one of the participants displayed a circadian rhythm between 24 and 25 hours.

Question 3

Folkard et al.

Answer 3

12 people lived in a cave. Researchers sped up the clock so a 24-hour day lasted 22 hours. No participants were able to adjust to the new regime.