By 3 years of age, children generally have a firm understanding of others' reliability, but there is considerable variation among individual children. Little attention has been paid to factors that influence such individual differences. This study addressed this by assessing the relation between reliability understanding and temperament in children approaching their third birthday. We measured children's ability to judge a speaker's trustworthiness and to selectively learn new information from a reliable informant. Observer ratings provided assessments of children's activity, task orientation, and affect/ extraversion. Significant associations between selective trust and the temperament dimension of affect/extraversion were found, along with associations between selective trust and gender and language ability. This indicates that the ability to ascertain whether a speaker is a reliable person from whom to learn is related to several individual child characteristics. Copyright © 2014 John Wiley & Sons, Ltd.Key words: individual differences; trust; temperament Children actively seek others as sources of information about the world and need to select appropriate informants, by attending to their accuracy and trustworthiness, in order to become effective learners (Harris, 2007). Understanding of others' reliability develops early in life and has two components. The first, reliability tracking, is the ability to explicitly judge whether an informant is providing accurate information. The second, selective trust, involves selectively learning from only a previously reliable person. Most previous research on reliability understanding has studied children's average capacities for one or both of these components. Although not well studied, there is much individual variation in reliability understanding among children, and we do not yet know what factors lead to such individual differences. Given the importance of reliability understanding for learning, understanding the sources of variation that lead to individual patterns of development is critical.The goal of this study was to examine one possible source of individual variation in reliability understanding-temperament. Individual differences in temperament play an important role in cognitive development and social competence in early childhood (Eisenberg & Fabes, 1992;Matheny, 1989). Studies looking at the role of temperament in specific social cognitive abilities report temperament as an important underlying factor in joint attention (Vaughan et al., 2003) and imitation (McCall, Parke, & Kavanaugh, 1977). By exploring the temperamental traits associated with children's understanding of trustworthiness, this study will improve our understanding of why some children are better able to select appropriate informants. As such, it may suggest new avenues for improving children's abilities in this important cognitive domain.
Early Reliability UnderstandingEarly in development, children consider the accuracy of those around them (see . In their second year, infants begin to d...