Proceedings of the Annual Meeting of the Cognitive Science Society

Problem solving under time and material constraints assumes that humans face both their own internal computational limitations and constraints of the external task environment. To find optimal solutions under these constraints, the agent must adapt their behavior by using various strategies such as offloading (i.e., using external materials to aid their performance). We designed a novel tower building task to investigate adaptive use of strategies under constraints. The task worked as designed: Participants found the optimal solution most often on the least difficult scenario and least often on the most difficult scenario. Surprisingly, offloading led to no significant differences in performance. However, on the most difficult scenario, some participants found the optimal solution using a prospective, concurrent, or retrospective strategy based on experience with the constraints of the task environment. We conclude that optimality can be understood as a trend over time and investigated in studies that allow multiple attempts.