Ultradian And Infradian Rhythms Flashcards
Individual differences in sleep stages:
Tucker et al
differences in sleep are often attribute it to differences in non-biological factors i.e. room temperature’
T: argued that differences are biologically determined. He studied participants in a lab for 11 days and nights assessing aspects of sleep
they found large individual differences in each of the aspects studied, suggesting that differences between participants are at least partially biologically determined
Research support for BRAC:
Ericsson et al
E: studied a group violinists and found that practice sessions are usually limited to the duration of no more than 90 minutes at a time
His analysis also indicated that the violinists frequently napped to recover from practice which supports Kleitmans claim of fatigue after 90 minutes
The menstruated cycle - the role of exogenous cues
it can also be controlled by exogenous cues; when women of childbearing age live together and do not take oral contraceptives then menstrual cycles tend to synchronise
In a study samples of sweat were collected from one group of women and rubbed onto the upper lips of women in a second group; findings found that even when kept separate their menstrual cycles became synchronised with their ‘odour donor’
This shows that synchronisation of menstrual cycles can be affected by pheromones; mechanism affecting the bodies of those close by
The menstrual cycle influences mate choice
Penton-Voak et al
Human mate choice varies across the menstrual cycle causing different preferences at different stages
PV: found that women expressed a preference for slightly feminised male faces for long-term relationships associated with kindness and cooperation in parental care but in the ovulatory phase, they showed a preference for more masculined faces for short term
