circadian rhythms Flashcards

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1
Q

Siffre 1962

A

spent 2 months in a cave with no natural light. his ‘free running’ biological rhythm settled down but was around 25 hours, he continued to fall asleep and wake up on a regular schedule

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2
Q

Aschoff and Wever 1976

A

participants spent 4 weeks in a world war 3 bunker with no natural light. one person circadian rhythm was 29 hours but all other participants was 24-25 hours

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3
Q

Folkard 1985

A

studies group of 12 who lived in dark cave for 3 weeks, went to sleep when the clock said 11:45 and woke when said 7:45. over time, the researchers gradually sped up the clock so lasted only 22 hours –> revealed one participants could comfortably adjust to new regime. suggests circadian rhythm cannot be easily overridden by exogenous zeitgebers

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4
Q

Bovin et al 1996

A

showed that night workers engaging in shift work have a period of reduced concentration at around 6am

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5
Q

Knutson 2003

A

relationship between shift workers and poor health, shift workers are three times more likely to develop a heart disease than those in more typical work patterns

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6
Q

solomon 1993

A

concluded that high divorce rates in shift workers may be because of the strain of being sleep deprived and missing family events

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7
Q

Bonten et al 2015

A

research supports that taking aspirin for reducing the risk of a heart attack is most effective if taken last thing at night. This is because heart attacks are most likely to occur in the morning

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8
Q

czeisler et al 1999

A

individual differences in sleep/wake cycle vary form 13 to 65 hours

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9
Q

Duffy et al 2001

A

showed that some people have a natural preference for going to bed early and waking early(called larks). however, others have a preference for going to bed late and waking late (owls)

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10
Q

Folkard et al 1977

A

showed hoe children who had stories read to them at 3 pm showed better recall and comprehension after a week than children has them read to them at 9 am

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11
Q

Gupta 1991

A

found improved performance on IQ tests when participants were assessed at 7pm than at 2 am and 9am

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