The researchers say they found strong evidence that signs of disorder can lead individuals to carry out criminal acts or bad behavior.

VOA: special.2009.03.03

They say their findings show that even low levels of smoke may cause behavior problems in children with asthma or others at risk.

VOA: special.2009.01.13

Commuters also complained about other drivers' rude and aggressive behavior when traffic started to slow or stop.

VOA: standard.2010.07.26