Dement and Kleitman 1957

This is a breif summary of the dement and kleitman study and how eye movement during sleep can maybe be related to dream activity. 

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Dement and kleitman (1957)
Sleep and dreaming
Kleitman did an earlier experiment
Already shown a link between dreaming and REM
Investigate the relationship between eye movement and dreaming
3 hypotheses
Association between REM sleep and dreaming
Positive correlation between estimate of duration of dreams and
length of eye movement
Pattern of eye movement and context of dream
9 adults (7m+2f) Volunteer sample
5 ptts studied between (6-17 nights)
Others (1-2 nights)
Lab study sleeping lab
Arrived before their normal bedtime
No Alcohol / Coffee
Had EOG's around their eye movements
Had EEG's to measure their brain activity
Slept in a dark room
Woke up at various time by a bell
Either during REM or Non-REM sleep
Average 5.7 times a night
Not told when they were going to be woken
Speak into a recorder
What they dreamt about
Estimate the length of their dream
ALL ppts experienced periods of REM sleep each night
In REM sleep=
Mean percentage of dreams recall was 80%
Anomalies= people who didn't dream occurred at beginning of
night where not much REM occurs
In Non-REM sleep=
Mean percentage of dream recall was 7%
Anomalies= ½ people who dreamed in non-REM sleep came out of
REM 8mins ago
PTTS were able to better recall dreams in a REM sleep
Most people accurate in estimation of dream duration
15 mins after waking =78%

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Dement and kleitman (1957)
Sleep and dreaming
5 mins after waking = 88%
Eye movement:
Eye direction may be related to content of dream
Vertical = climbing ladders
Horizontal= throwing tomatoes at each other
Both = looking at close things
No movement= looking at far away things
Ecological validity
Lab experiment (not normal surroundings)
May have affected their sleep patterns
Method of waking ptts may have affected their dream
Small sample size
2 females so biased to men
Demand characteristics not…read more


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