Abstract
In the field of social influences on Theory of Mind (ToM), more research has focused on the role of parents, but less research has examined the impact of siblings on children’s social understanding. We review existing research related to what factors might affect sibling–ToM association and how these potential factors affect ToM. Based on the literature review, we propose an integrative model that unites three categories of factors (i.e., sibling structural variables, sibling individual variables, parental intervening variables) that might have effects on the sibling–ToM association and highlights mental-state talks during sibling interactions at the intersection of sibling-related variables and ToM. Furthermore, we propose some issues arising from this review that need to be clarified in future studies. Specifically, we hope to clarify the specific effects of older and younger siblings on children’s understanding of human minds, the similarities and differences of sibling–ToM association under different cultural backgrounds, and the impact of family social disadvantage (e.g., lower SES) on the sibling–ToM association. All these works would benefit from the verification, revision, and expansion of our reciprocal influence model for the sibling–ToM association.
Highlights
Theory of Mind (ToM), or mindreading, is a competence to infer one’s own and others’ mental states
By integrating existing literature and unresolved problems, the current review proposes an integrative model for the sibling–ToM association, which underlines the reciprocal effect and dynamic development of the sibling–ToM link
As mentioned in subsection “The Dynamic Development of Sibling–ToM Association,” both individual cognitive capabilities (e.g., ToM and language) and interaction variables that relate to the sibling–ToM link are dynamic, changing as children grow older, which requires researchers to examine the relationship between siblings and ToM from the perspective of development
Summary
Theory of Mind (ToM), or mindreading, is a competence to infer one’s own and others’ mental states (such as desires, emotions, knowledge, intents, and beliefs, Wellman, 2017; Devine and Hughes, 2018). Cooperation, and conflicts between siblings Piaget’s theory of cognitive development (a) Sibling interaction promote each other’s mental state understanding (b) This “sibling effect” either positive or negative (c) This sibling-ToM association is dynamic developing with age (a) Age of sibling dyads (b) Quantity and quality of mental-state talks Mental-state talks between parents and children (a) Vygotsky’s sociocultural theory; (b) Piaget’s theory of cognitive development knowledge about human mental states, with older siblings being superior because they play a social mentor role to the younger “apprentices” (Hughes et al, 2014; Kennedy et al, 2015). When younger children reach a certain age, where both sibling dyads are qualified with linguistic ability and social experiences that enable them to develop effective interactions (e.g., joint play, arguments), both can promote each other’s mental-state understanding. (d) The age threshold model can be traced back to Piaget’s theory of cognitive development, emphasizing that peer interactions (especially conflicts) play a crucial role in social-cognitive development
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