Research from Children's Hospital & Regional Medical Center - in Seattle - is confirming that watching violent television programs between the ages of 2 and 5 years of age is linked to aggressive and anti-social behaviors in boys when they reach age 7 to 9.
The journal article titled Violent Television Viewing During Preschool is Associated with Anti-social Behavior During School Age reviews data from a 40-year study of 8,000 U.S. families.