SVD single voxel analysis Frank Leone, Ivan Toni, Pieter Medendorp
SVD single voxel analysis
Jan 05, 2016
Frank Leone, Ivan Toni, Pieter Medendorp. SVD single voxel analysis. Location = direction * amplitude?. vs. Singular value decomposition. Previous work: Location = X * Y (auditory domain). Pena & Konishi , 2001. Previous work: Eye vs Hand relative tuning. Pesaran et al, 2006. - PowerPoint PPT Presentation
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
SVD single voxel analysisFrank Leone, Ivan Toni, Pieter Medendorp
Location = direction * amplitude?
vs
Singular value decomposition
Previous work: Location = X * Y (auditory domain)
Pena & Konishi, 2001
Previous work: Eye vs Hand relative tuning
Pesaran et al, 2006
Previous work: Eye vs Hand relative tuning
Pesaran et al, 2006
Closer inspection of fields
Roughly Gaussian
Correlation preferred amplitude and field width (?, in progress)
Extensions / applications
Test different representations:• X – Y• Multiplication vs addition
Test separability in general, of any two multivalue effects
More general: fit functions through your single voxel t-values, instead of making simple contrasts
T values or beta’s?
Conclusion
There is more than meets in the eye in single voxels
Can fit functions to your t-values
Can use SVD to test separability
Related Documents
