Group polarization is when inside a group what first was an inclination to some ideas, after the individuals talk, those same ideas become much more stronger and radical. As the exercise exemplifies, the jury is deliberating and their initial attitudes are leaning neutral to slighty toward a guilty verdict. After a few days of deliberation, their ideas have strengthened considerably toward a guilty verdict. That's a good example of group polarization.
It has hugely impacted cities and how they are designed because the automobile and the highway made transporting things from all over much easier and efficient. Still today alot of cargo is hauled by automobiles to various places
