Please hurry
Scientists are conducting an experiment
with university students to investigate
the effects that different kinds of food
have on sleep behaviors. During the
experiment, the sleep behaviors of the
students are monitored closely. Which of
these aspects of this experiment would
probably be most difficult to measure
accurately for each student?
J
K
L
M
Length of time between when the
student goes to bed and when the
student falls asleep
Length of time the student dreams
Number of times the student changes
sleep position
Number of times the student wakes up
