Ideation, groupthink, and brainstorming

“Decades of research have consistently shown that brainstorming groups think of far fewer ideas than the same number of people who work alone and later pool their ideas.”
Keith Sawyer, a psychologist at Washington University, in summarising the science of brainstorming:

Read more http://www.newyorker.com/reporting/2012/01/30/120130fa_fact_lehrer