Children who watch excessive amounts of television are more likely to have criminal convictions and show aggressive personality traits as adults, a New Zealand study has found. The University of Otago study tracked the viewing habits of about 1,000 children born in the early 1970s from when they were aged five to 15, then followed up when the subjects were 26 years old to assess potential impacts. The research, published in the US journal "Pediatrics" this week, found a strong correlation between childhood exposure to television and anti-social behaviour in young adults.