“…These results support the observations of Berndt (1987), Gottman (1983) and Nelson and Aboud (1985) who found that friends show a greater openness to mutual opposition than do nonfriends. They are also particularly interesting in light of the finding by many researchers that expression of different points of view by "neutral" partners facilitates intellectual progress (Ames & Murray , 1982;Dalzon, 1988;Doise, Mugny, & Perret-Clermont, 1975;Grossen, 1988;Murray, 1982;Perret-Clermont, 1979;Perret-Clermont & Nicolet, 1988;Roy & Howe, 1990). Best friends also engaged in a higher frequency of evaluation (Jonckheere Test, p <.06), particularly concerning negative evaluation of the partner, a behavior which was never observed in other dyads (Jonckeere Test, p< .02) and further indicates a certain level of confidence in the relationship.…”