Discussion of shared and unshared information in decision-making groups.

The effects of task importance and group decision training on the discussion behavior of decision-making groups were investigated. Three-person groups decided which of 3 hypothetical faculty candidates would be the best person to teach an introductory psychology course. Prior to discussion, some of the information about each candidate was given to all group members (shared information), whereas the remainder was randomly divided among them (unshared information). In general, groups discussed much more of their shared information than their unshared information. Increasing the importance of the task slowed the rate at which information was brought forth during discussion