Emergent social transmission of model-based representations without inference
This addresses the problem of understanding cultural transmission mechanisms in cognitive science, offering an incremental insight by demonstrating non-mentalizing processes.
The study tackled how people acquire complex knowledge from others without costly mental inference, showing through reinforcement learning simulations that simple social cues can transmit higher-level representations, with model-based learners converging faster toward expert-like representations.
How do people acquire rich, flexible knowledge about their environment from others despite limited cognitive capacity? Humans are often thought to rely on computationally costly mentalizing, such as inferring others' beliefs. In contrast, cultural evolution emphasizes that behavioral transmission can be supported by simple social cues. Using reinforcement learning simulations, we show how minimal social learning can indirectly transmit higher-level representations. We simulate a naïve agent searching for rewards in a reconfigurable environment, learning either alone or by observing an expert - crucially, without inferring mental states. Instead, the learner heuristically selects actions or boosts value representations based on observed actions. Our results demonstrate that these cues bias the learner's experience, causing its representation to converge toward the expert's. Model-based learners benefit most from social exposure, showing faster learning and more expert-like representations. These findings show how cultural transmission can arise from simple, non-mentalizing processes exploiting asocial learning mechanisms.