From Tutorial on Neural Systems Modeling, Chapter 7:
This tool trains two-layered, feedforward networks having multiple input units, but only one output unit, to associate patterns using gradient estimation through perturbation of one weight at a time.
Researchers should cite this work as follows:
Tutorial on Neural Systems Modeling, Copyright 2010 Sinauer Associates Inc.
Author: Thomas J. Anastasio
AbderRahman N Sobh, Jessica S Johnson, NanoBio Node (2014), "[Illinois]: Error Gradient Estimations Due to Perturbation of One Weight at a Time," https://nanohub.org/resources/pertgrad1by1. (DOI: 10.4231/D3NZ80R0K).