iiinova — where your digital self keeps evolving

Paul Bergmann

@pkbergmann.bsky.social

163 followers 410 following 7 posts

PhD candidate in Psychology at the Computational Modelling of Behaviour Lab, University of Marburg. Interested in cooperation, social learning, and inequality.

Posts Replies Media

Paul Bergmann @pkbergmann.bsky.social · 10/07/2026

By varying the available social information, we find that most well-known social learning strategies reduce decision quality in the multiplicative environment. Payoff- and wealth- biased learning strategies, which perform best in additive environments, led to the worst outcomes. 4/7

Heatmaps of individual learning parameters across several social learning strategies and across additive and multiplicative environments. Individual learning rate and inverse temperature are systematically varied. In the additive environment, all social learning strategies (including conformity, unbiased copying, payoff bias and wealth bias) improve performance by increasing the probability of choosing the riskier option that has a higher expected value. In the multiplicative environment, all social learning strategies with the exception of conformity deteriorate performance, also increasing the probability of choosing the riskier option, which is worse in the multiplicative environment given its higher variance (i.e., lower time-average growth rate).

120

Paul Bergmann @pkbergmann.bsky.social · 10/07/2026

By varying the available social information, we find that most well-known social learning strategies reduce decision quality in the multiplicative environment. Payoff- and wealth- biased learning strategies, which perform best in additive environments, led to the worst outcomes. 4/7

120