“…There may be some reasons for the above contradictory results. The tasks to be performed and the subjects’ ages varied across studies: remembering by adults or undergraduate students (Stephenson, Abrams, Wagner, & Wade, 1986; Clark & Stephenson, 1990; Yarmey, 1992; Andersson & Rönnberg, 1995; Andersson & Rönnberg, 1996), proofreading by undergraduate students (Riefer, 1993), spelling achievement by children (Wiersema & Van Oudenhoven, 1992), text learning by undergraduate students (McDonald, Larson & Dansereau, 1985), problem‐solving by children (Azmitia, 1988) and so on. The studies varied also in the way of performing the tasks, from a working style in which two individuals worked separately on the same task, to a style in which two individuals were in interaction discussing the task.…”