Layers of Social Meaning: Innate, Acquired, and Deliberative Levels of Referential Signal Processing.

Referential signaling is a fundamental component of social interaction, enabling individuals to direct attention, convey intention, and establish shared understanding. The processing of referential signals operates across multiple levels of neurocognitive systems. First, innate mechanisms rapidly detect socially relevant cues, such as gaze and biological motion, prioritizing social information from infancy. Second, social learning enables the establishment of symbolic conventions in service of referential interactions, implicating the alignment of abstract representations across brains. Third, a deliberative system supports the flexible production and interpretation of referential signals in context by anticipating others' beliefs and motivation. Despite the diversity and complexity of these processes, recent research has made significant strides in identifying their neural and cognitive bases. Studies indicate that evolutionarily conserved subcortical pathways support early-emerging sensitivity, while cortical networks involved in social reasoning and decision-making underlie acquired and deliberative levels of processing. Future research is needed to clarify how these mechanisms interact across development and how their disruption contributes to neurodevelopmental conditions such as autism spectrum disorder.