Sequential Explanations with Mental Model-Based Policies
This work addresses the challenge of improving interpretability in AI systems for users through better explanation selection, though it appears incremental as it builds on existing explanation methods with a novel policy approach.
The paper tackled the problem of selecting sequential explanations to optimize interpretability by using reinforcement learning policies based on the explainee's mental model, and found that these policies may increase interpretability compared to a random baseline in online human experiments.
The act of explaining across two parties is a feedback loop, where one provides information on what needs to be explained and the other provides an explanation relevant to this information. We apply a reinforcement learning framework which emulates this format by providing explanations based on the explainee's current mental model. We conduct novel online human experiments where explanations generated by various explanation methods are selected and presented to participants, using policies which observe participants' mental models, in order to optimize an interpretability proxy. Our results suggest that mental model-based policies (anchored in our proposed state representation) may increase interpretability over multiple sequential explanations, when compared to a random selection baseline. This work provides insight into how to select explanations which increase relevant information for users, and into conducting human-grounded experimentation to understand interpretability.