Czeisler et al. Study of Shiftwork Flashcards
aim
to find out whether disturbances in the sleep/wake cycle created by working at night could be prevented by exposure to bright light during the night and darkness during the day
participants
8 men
control condition
participants worked at night in ordinary lighting
experimental condition
participants worked at night in extremely bright light and complete darkness during the day
the temperatures of the group who had been treated fell at…
midday, showing that this group’s circadian rhythm had adapted
having measurements constantly taken may have…
adversely affected participants, reducing validity of the results
complex procedures mean that…
the experiment was time consuming and hard to replicate
variables like caffeine were controlled, meaning that…
results are more valid, as it is only light that could have caused the change
the use of only men means that…
the study cannot be generalised to females
the use of only 8 participants means that…
there is a small sample size, meaning that results are less reliable
