Value-based routing of delayed intentions into brain-based vs external memory stores
Individuals have the option of remembering delayed intentions by storing them in internal memory or offloading them to an external store such as a diary or smartphone alert. How do we route intentions to the appropriate store, and what are the consequences of this? We report three experiments (two pre-registered) investigating the role of value. In Experiment 1, participants preferentially offloaded high-value intentions to the external environment. This improved memory for both high- and low-value content. Experiment 2 replicated the low-value memory enhancement even when only high-value intentions were offloaded. This suggests that internal memory is reallocated to low-value information once it is no longer required for high-value content. Experiment 3 showed that memory is better for low- than high-value content when external memory for high-value content fails. Therefore, individuals prioritize high-value information for external memory; consequently, they can be left with nothing but low-value information if it fails.