Dement and Kleitman

Question 1

Aim

Answer 1

• find out about dreaming. 3 specific questions
  1. Does dream recall differ between eye movement (REM) and quiescent (NREM) stages of sleep
  2. Is there a positive correlation between subjective estimates of dream duration and the length of the REM period of waking?
  3. Are eye movement patterns related to dream content?

Question 2

Question 1

Answer 2

1. Does dream recall differ between eye movement (REM) and quiescent (NREM) stages of sleep
   - repeated measures
   - IV: woken from REM or NREM
   - DV: whether recalled the dream or not
   - the choice of REM and NREM sleep was decided in different ways
   - asked whether dreamt or not , descibed in a recorder, experimenter occasionally came
   - REM: 79.6% dream
   - NREM: 93% no dream

Question 3

Question 2

Answer 3

2. Is there a positive correlation between subjective estimates of dream duration and the length of the REM period of waking?
   - was a correlation
   - woken after either 5 or 15 mins in REM sleep
   - no. of words in the dream narrative was counted

Question 4

Question 3

Answer 4

3. Are eye movement patterns related to dream content?
   -self-reports
   -direction of eye movements was detected using EEG
   -

Question 5

Sample

Answer 5

• 7 male and 2 female
• 5 were studied in detail
• 4 were used to confirm the results of he 5

Question 6

EEG

Answer 6

• Electroencephalograph

- used to detect and record electrical activity in nerve and muscles cells

Question 7

Results

Answer 7

• uninterrupted dreams lasted 3-50 mins (average:20 mins)
• typically longer later in the night
• when woken form NREM returned to NREM
• when woken from REM ,did not dream again