Modeling Speed-Accuracy Tradeoff in Adaptive System for Practicing Estimation.

Estimation is useful in situations where an exact answer is not as important as a quick answer that is good enough. A web-based adaptive system for practicing estimates is currently being developed. We propose a simple model for estimating student’s latent skill of estimation. This model combines a continuous measure of correctness and responsetimes. The advantage of the model is its simple update method which makes it directly applicable in the developed adaptive system.