On the Structure of Measurement Noise in Eye-Tracking
AbstractPast research has discovered fractal structure in eye movement variability and interpreted this result as having theoretical ramifications. No research has, however, investigated how properties of the eye-tracking instrument might affect the structure of measurement varia-bility. The current experiment employed fractal and multifractal methods to investigate whether an eye-tracker produced intrinsic random variation and how features of the data recording procedure affected the structure measurement variability. The results of this experiment revealed that the structure of variation from a fake eye was indeed random and uncorrelated in contrast to the fractal structure from a fixated, real human eye. Moreover, the results demonstrated that data-averaging generally changes the structure of variation, introducing spurious structure into eye movement variability.
Copyright (c) 2012 Charles A. Coey, Sebastian Wallot, Michael J. Richardson, Guy Van Orden
This work is licensed under a Creative Commons Attribution 4.0 International License.