PT  - JOURNAL ARTICLE
AU  - Hall-McMaster, Sam
AU  - Tomov, Momchil
AU  - Gershman, Samuel J.
AU  - Schuck, Nicolas W.
TI  - Neural Prioritisation of Past Solutions Supports Generalisation
AID  - 10.1101/2024.06.10.598294
DP  - 2024 Jan 01
TA  - bioRxiv
PG  - 2024.06.10.598294
4099  - http://biorxiv.org/content/early/2024/08/20/2024.06.10.598294.short
4100  - http://biorxiv.org/content/early/2024/08/20/2024.06.10.598294.full
AB  - Generalisation across tasks is an important feature of intelligent systems. One efficient computational strategy is to evaluate solutions to earlier tasks as candidates for reuse. Consistent with this idea, we found that human participants (n=40) learned optimal solutions to a set of training tasks and generalised them to novel test tasks in a reward selective manner. This behaviour was consistent with a computational process based on the successor representation known as successor features and generalised policy improvement (SF&GPI). Full model-based control or model-free perseveration could not explain choice behaviour. Decoding from functional magnetic resonance imaging data revealed that solutions from the SF&GPI algorithm were activated on test tasks in visual and prefrontal cortex. This activation had a functional connection to behaviour in that stronger activation of SF&GPI solutions in visual areas was associated with increased behavioural reuse. These findings point to the neural implementation of an adaptive algorithm for generalisation across tasks.Competing Interest StatementThe authors have declared no competing interest.