The power law repealed: the case for an exponential law of practice.

@article{Heathcote2000ThePL,
title={The power law repealed: the case for an exponential law of practice.},
author={Andrew Heathcote and Sally L. Brown and Douglas J. K. Mewhort},
journal={Psychonomic bulletin & review},
year={2000},
volume={7 2},
pages={185-207}
}

The power function is treated as the law relating response time to practice trials. However, the evidence for a power law is flawed, because it is based on averaged data. We report a survey that assessed the form of the practice function for individual learners and learning conditions in paradigms that have shaped theories of skill acquisition. We fit power and exponential functions to 40 sets of data representing 7,910 learning series from 475 subjects in 24 experiments. The exponential… CONTINUE READING