Sourced with compliments from http://www.spring.org.uk/2009/09/how-groups-form-conform-then-warp-our-decision-making-productivity-and-creativity.php
When we’re in a group other people have an incredibly powerful effect on us. Groups can kill our creativity, inspire us to work harder, allow us to slack off, skew our decision-making and make us clam up.
The keys to understanding human behaviour—our lives as citizens, as workers, as friends—are in the research on group psychology, which PsyBlog has been exploring over the past few months.
This post provides an overview and you can follow the links to explore the experiments that reveal the power groups hold over us.