"Neuroeconomics: cross-currents in research on decision-making" Trends in Cognitive Sciences, Volume 10, Issue 3, March 2006, Pages 108-116
Alan G. Sanfey, George Loewenstein, Samuel M. McClure, Jonathan D. Cohen
psychologists make between automatic and controlled processes. Automatic processes are fast and efficient, can often be carried out in parallel, but are highly specialized for domain-specific operations and therefore relatively inflexible. They are thought to reflect the operation of highly over-trained (and, in some cases, possibly ‘hardwired’) mechanisms. However, humans also have a capability for controlled processing underlying our higher cognitive faculties. Controlled processes are highly flexible, and thus able to support a wide variety of goals, but are relatively slow to engage and rely on limited capacity mechanisms – that is, they can support only a small number of pursuits at a time.
Creative thinking and problem solving when they lie outside of domain-specific expertise is a slow process. As G.Altshuller used to say, "Good thinking is slow thinking." This may also relate to the
social facilitation effect studied extensively by Robert Zajonc.
From this perspective, effective brainstorm is an information exchange exercise rather than a problem solving session.