ultradian rythmn Flashcards
(10 cards)
what is an ultradian rythmn
biological rythmn with a frequency of more than one cycle in 24 hours
what is an example of a ultradian rythmn
the sleep cycle-psychologists have identified 5 sleep stages that span for approximately 90 minutes
what are stages 1 and 2 known as
light sleep when pps can easily be woken, brain wave patterns start to slow down
what are stages 3 and 4 known as
known as the deep sleep or slow down, its more difficult to wake someone up here than it is in stages 1+2 as brain waves are slower
what is stage 5 known as
REM sleep, the body is paralysed but brain activity speeds up rapidly in a manner that resembles an awake brain
what does REM stand for
rapid eye movement
what was the study for ultradian rythmns
investigated change in brain activity during sleep, 7 adult males and 2 females were asked to report to a lab when they wanted to sleep so they could be connected to a eeg that took measurements throughout their sleep
what were pps instructed before the study
to not take any caffeinated substances before they sleep
what were the results
All pps had REM everynight, also found high incidences of dream recall when pps were awakened during REM periods, if awakened during other stages very few reported dreaming
what is the a03 for this study
small sample size- uses 9 people, cant be generalised to the whole population.
eeg provides an objective measure, the data is empirical and therefore the results are verifiable
