Telescoping Determinant Plots as an Index of Cognitive Information Accounted for in Electrophysiological Visual Evoked Response Data

• Activity Number: 391
• Type: Contributed
• Date/Time: Wednesday, August 6, 2008 : 10:30 AM to 12:20 PM
• Sponsor: ENAR
• Author(s): Daniel S. Barron*+ and Bruce L. Brown and Dawson W. Hedges
• Companies: Brigham Young University and Brigham Young University and Brigham Young University
• Keywords: visual evoked response (VER) ; electrophysiology ; cognitive processes ; multivariate graphics

Abstract

Brown, Hedges, and Gantt (2008) introduce a multivariate graphical technique for capturing cognitive processes through visual evoked responses (VER). In the past it has been difficult to capture cognitive information in VER profiles because, like fingerprints, they are strongly ideographic. That is, they have a strong individual difference component, with each person having a unique set of VER profiles. However, aperiodic components analysis has the demonstrated capacity to separate the surface structure of individual differences from the deep structure of underlying cognitive processes, both mathematically and graphically. This paper demonstrates a secondary development in aperiodic components methodology---a procedure for quantifying the extent to which each aperiodic component captures a given aspect of cognitive processing. This procedure is based upon telescoping determinant plots.