It is well-known that lack of sleep impairs concentration and alertness, and this might be due partly to late night food consumption. A study took 44 people aged 21 to 50 and gave them unlimited access to food and drink during the day, but allowed them only 4 hours of sleep per night for three consecutive nights. On the fourth night, all participants again had to stay up until 4 am, but this time participants were randomized into two groups; one group was only given access to water from 10 pm until their bedtime at 4 am while the other group still had unlimited access to food and drink for all hours. The group forced to fast from 10 pm on performed significantly better on tests of reactio
Consider the following study: Late Night Eating
It is well-known that lack of sleep impairs concentration and alertness, and this might be due
partly to late night food consumption. A study took 44 people aged 21 to 50 and gave them
unlimited access to food and drink during the day, but allowed them only 4 hours of sleep per
night for three consecutive nights. On the fourth night, all participants again had to stay up
until 4 am, but this time participants were randomized into two groups; one group was only
given access to water from 10 pm until their bedtime at 4 am while the other group still had
unlimited access to food and drink for all hours. The group forced to fast from 10 pm on
performed significantly better on tests of reaction time and had fewer attention lapses than
the group with access to late night food.
What is the population of this study?
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