Lead
author of the study Frederick Zimmerman says, "The
most important fact to come from this study is there
is no clear evidence of a benefit coming from baby
DVDs and videos and there is some suggestion of harm.
The bottom line is the more a child watches baby DVDs
and videos the bigger the effect. The amount of viewing
does matter."
The
paper is part of a larger project looking at the trajectory
of media viewing in the first two years of life and
examining the content of what is being watched and
its effects on young children. A paper published last
spring by the same researchers showed that by three
months of age 40 per cent of infants are regular viewers
of television, DVDs or videos and by the age of two
this number jumps to 90 per cent.
For
both papers, the researchers conducted random telephone
interviews with more than 1,000 families in Minnesota
and Washington with a child born in the previous two
years. Television, DVD and video viewing were divided
into four categories: baby DVDs and videos; educational
TV programmes, DVDs and videos such as Sesame Street,
Arthur and Blues Clues; childrens non-educational
television shows and movies such as Sponge Bob
Square Pants, Bob the Builder and Toy Story and
adult television such as The Simpsons, Oprah and
sports programming.
The
researchers found no positive or negative effects
on infants of either age group from viewing educational
and non-educational media or adult television programs,
reveal the findings.
The
researchers believe the content of baby DVDs and videos
is different from the other types of programming because
it tends to have little dialogue, short scenes, disconnected
pictures and shows linguistically indescribable images
such as a lava lamp. By contrast, childrens
educational programs, which make up the largest viewing
category at this age, are, crafted and tested to meet
developmental needs of preschool children.
Zimmerman
adds, "We dont know for sure that baby
DVDs and videos are harmful, but the best policy is
safety first. Parents should limit their exposure
as much as possible. Over the course of childhood,
children spend more time watching TV than they do
in school. So parents need to spend as much time monitoring
TV and other media viewing as they do in monitoring
their childrens school activities."
The
researchers believe more research is required, particularly
to examine the long-term effects of baby DVDs and
videos on childrens cognitive development.