This video is a screen recording from the VERP Explorer, an interactive visual analysis
tool that integrates conventional visualizations (left) of eye tracking data with recurrence
plots (right). The video demonstrates the tool using a two-dimensional projection of the Lorenz
attractor, a chaotic time-varying function (solution to the Lorenz system).
Why is the VERP Explorer useful?
By tracking the sequential attention of the user, eye movements afford a unique
window into visual-cognitive interactions. Advances in eye tracking technology have
made eye movement data collection more practical than ever, offering new
opportunities for automated visual design evaluation. The VERP Explorer
essentially enables users to perform recurrence based visual analysis
of eye tracking datasets, coupled with several standard and new
spatial visualizations of eye movements.
How can recurrence plots help in eye movement analysis?
Originated from the study of dynamical systems in the physics literature,
recurrence plots are simple but powerful, revealing
patterns of revisitation (cycles) over time. A recurrence plot of a time varying
function can be viewed as a signature or barcode of the function. More
importantly, recurrence plots lend themselves to quantified analysis.
For example, the VERP Explorer enables users to compute several
metrics from recurrence plots that characterize different aspects of
visual-cognitive interactions manifested by eye movements.