Information exchange among group members often helps individuals to remember things that they would not have remembered had they been working alone. In other words, the information provided by Person A may 'cue' memories in Person B. This phenomenon results in enhanced recall.
Members of a group often specialize, to a greater or lesser degree, in different areas. Transactive memory refers to the process by which information that must be remembered is distributed (either explicitly or implicitly) to members of the group who can either be relied upon to provide the information when it is needed. For example, the weapons expert in a group may remember the specifications of a new semi-automatic rifle, while the scout may remember the layout of trenches at enemy lines.