Conclusion of the article: "Researchers in Canada
say children who spent more time with screens at two
years of age did worse on tests of development at age
three than children who had spent little time with
devices. A similar result was found when children's screen time
at three years old was compared with their development
at five years."
So they're studying children from ages 2-5 (not all children).
They studied 2441 mothers and children in Calgary,
Alberta, Canada.
Participants included mothers and children from
the All Our Families study, a large, prospective
pregnancy cohort of 3388 mothers and children from
Calgary, Alberta, Canada
They measured screen time at 2 years and 3 years.
Mothers indicated the range of time their child
spent using particular electronic mediums on a typical
weekday and weekend day. Mothers reported on the
following devices and/or mediums: watch television
programs; watch movies, videos, or stories on a VCR or
DVD player; use a computer, gaming system, or other
screen-based devices. A weighted weekly average of
weekday and weekend screen time across mediums was
calculated to yield screen time use in hours/week.
Child sex was coded as female (1) or male (0), and
maternal and child age were recorded in years
and months, respectively. When the child was 12
months, mothers indicated whether they "look at
or read children's books to my child," coded as
not very often (1), sometimes (2), or often
(3). When the child was 24 months, mothers
indicated the amount of time that the child
engaged in physical activity on a typical
weekday, ranging from none (1) to 7 hours or
more (7), and completed the Center for
Epidemiologic Depression Scale.
Finding (from their report): " In this cohort
study of early childhood development in 2441
mothers and children, higher levels of screen
time in children aged 24 and 36 months were
associated with poor performance on a screening
measure assessing chidren's achievement of
development milestones at 36 and 60 months,
respectively."
What might you have done differently?
What variables were collected, and are they quantitative
or categorical?
Links:
StatCrunch instructions for packet 2 (and IMath homework):
Load the Stop
and Frisk Data for packet 2. Click on My Data,
then "Upload data set".
Under "Select data
source", choose "WWW address", and make sure to set
the delimiter to "comma" (because this is a "csv"
(comma-separated values) file.
Once the data is loaded, click on "Graph" or "Table".
Alternatively, you may want to join my "group" on
Statcrunch. That way you can access the data more
quickly. It's Sta205-Long, if you want to add yourself
into that group.
For the IMath homework, you'll need the Bipolar
Depression Study data. Same thing: Load it by "WWW
address", and make sure to set the delimiter to
"comma" (because this is a "csv" (comma-separated
values) file (or get it from the group).
Website maintained by Andy Long.
Comments appreciated.