[USA] Violent Entertainment Pitched to Adolescents: An Analysis of PG-13 Films
PEDIATRICS Vol. 119 No. 6 June 2007, pp. e1219-e1229
http://pediatrics.aappublications.org/cgi/content/full/119/6/e1219
Theresa Webb, Lucille Jenkins, Nickolas Browne, Abdelmonen A. Afifi, Jess Kraus
"The purpose of this study was to evaluate the violence content of the top-grossing PG-13 films of 1999 and 2000 to determine what percentage of it had potential for negative effects on young viewers and what percentage of it had potential for prosocial or beneficial effects.
CONCLUSIONS. Violence permeated nearly 90% of the films in our study. Although only a small subset of this content contained violence that was associated with negative effects, only 1 film contained violence that was associated with protective or beneficial effects."