Elementary schoolchildren know a logical argument when they see one

Both empirical data and theoretical approaches suggest that argumentation is an important component of development of reasoning skills. We argue that if argumentation does have a primary role, then children should be able to distinguish more from less logical justifications even when they are incapable of determining the correct conclusion by themselves. We asked 8- and 11-year-old children to choose one of two conclusions for abstract reasoning problems, based on justifications from authority (friends and teacher) or logical ones (probability and counterexamples). Although there was a clear age-related increase, even the younger children considered logical justifications to be better than authority, irrespective of the specific conclusion endorsed. Thus, children can distinguish logical and non-logical justifications even when they cannot easily arrive at the correct conclusion by themselves.