Instant Difficulty Adjustment: Predicting Success Rate of VR Kendama when Changing the Difficulty Level

What is it about?

The sustained motivation of task engagement is a key factor in rehabilitation, games, and sports. The techniques of task difficulty adjustment contribute to determining the appropriate difficulty level in which the user can receive a pleasant user experience. Most traditional approaches have gradually increased or decreased the difficulty level, asymptotically approaching the ideal difficulty level, using the user's task performance as a reference. However, there is concern that such approaches may make the users feel stressed or bored with the task. In this study, we present a task difficulty adjustment method that allows the user to reach the appropriate difficulty level instantly using VR technology.

Featured Image

Why is it important?

Engaging in tasks is essential for skill development. However, sustaining user participation is not always easy because the user tends to stop an ongoing task if it is too easy or difficult. This dropout comes from not matching the current difficulty level with the user's skill. For this reason, it is significant to take an approach that models the user's skill based on past performance and sets the task difficulty at an appropriate level using the acquired model. In particular, we focus on the issue of instantly adjusting the task difficulty level because the users are difficult to continue the task so many times.