17. Where do we use it?
52%
75%
17%
74%
55%
46%
in bed soon after waking-up
at school or work
while exercising
while traveling
while waiting in a line
in bed before going to sleep
!
Ferriman, 2014
18. Where do we use it?
52%
75%
17%
74%
55%
46%
in bed soon after waking-up
at school or work
Suitable
while exercising
for
while traveling
learning?
while waiting in a line
in bed before going to sleep
!
Ferriman, 2014