Songs with violent lyrics increase aggressive thoughts and emotions, suggests a study in US college students.

The study contradicts a popular suggestion that music loaded with violent imagery, such as some rap and heavy metal, are cathartic in venting aggression.

Craig Anderson at Iowa State University and colleagues found that students who listened to songs with violent lyrics were more likely to make aggressive associations in subsequent psychological tests.

Although, the effects were measured over a short time only, the team believes listening to violent lyrics could have a long-term effect – contributing to the development of a more aggressive and confrontational personality.

More here.