Business NewsFebruary 28, 2012 / 1:56 AM / 7 years ago

It has 36 franchised stores in the country, the company’s website showed.

he world’s biggest hamburger chain said it plans to increase the number of franchised stores in China as it ramps up expansion in one of the world’s fastest-growing consumer markets.

McDonald's plans to expand franchising in China

The present research is the first experiment to test the cumulative causal effects of violent video games on aggression over a relatively long period of time—three days.

It is well established that violent video games increase aggression.

Smoking provides a useful analogy for the importance of this work. Smoking one cigarette will probably not cause lung cancer, but repeatedly smoking cigarettes for days, weeks, months, and years, greatly increases the risk.

Although single-session experiments allow one to make causal inferences about violent video game effects, they do not allow one to test whether violent video games have a cumulative effect on aggressive thoughts and behaviors.