When a student is asked to perform a given task, her subjective estimate of
the difficulty of that task has a strong influence on her performance. There
exists a rich literature on the impact of perceived task difficulty on
performance and motivation. Yet, there is another topic that is closely related
to the subject of the influence of perceived task difficulty that did not
receive any attention in previous research - the influence of revealing the
true difficulty of a task to the student. This paper investigates the impact of
revealing the task difficulty on the student's performance, motivation,
self-efficacy and subjective task value via an experiment in which workers are
asked to solve matchstick riddles. Furthermore, we discuss how the experiment
results might be relevant for AI-aided education. Specifically, we elaborate on
the question of how a student's learning experience might be improved by
supporting her with two types of AI systems: an AI system that predicts task
difficulty and an AI system that determines when task difficulty should be
revealed and when not.

本文旨在研究揭示任务难度对学生表现、动力、自我效能和主观任务价值的影响。研究者以火柴棒命题解决问题的实验为基础，讨论了如何通过 AI 系统预测和决定何时揭示任务难度等方法优化学生学习体验。