Visualization of Group Inference Data in Functional Neuroimaging
- Jan Gläscher
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While thresholded statistical parametric maps can convey an accurate account for the location and spatial extent of an effect in functional neuroimaging studies, their use is somewhat limited for characterizing more complex experimental effects, such as interactions in a factorial design. The resulting necessity for plotting the underlying data has long been recognized. Statistical Parametric Mapping (SPM) is a widely used software package for analyzing functional neuroimaging data that offers a variety of options for visualizing data from first level analyses. However, nowadays, the thrust of the statistical inference lies at the second level thus allowing for population inference. Unfortunately, the options for visualizing data from second level analyses are quite sparse. rfxplot is a new toolbox designed to alleviate this problem by providing a comprehensive array of options for plotting data from within second level analyses in SPM. These include graphs of average effect sizes (across subjects), averaged fitted responses and event-related blood oxygen level-dependent (BOLD) time courses. All data are retrieved from the underlying first level analyses and voxel selection can be tailored to the maximum effect in each subject within a defined search volume. All plot configurations can be easily configured via a graphical user-interface as well as non-interactively via a script. The large variety of plot options renders rfxplot suitable both for data exploration as well as producing high-quality figures for publications.
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- Visualization of Group Inference Data in Functional Neuroimaging
Volume 7, Issue 1 , pp 73-82
- Cover Date
- Print ISSN
- Online ISSN
- Humana Press Inc
- Additional Links
- Functional neuroimaging
- Data plotting
- Second level analyses
- Parametric modulation
- Fitted response
- Parameter estimate
- Event-related BOLD response
- Peri-stimulus time histogram
- Jan Gläscher (1)
- Author Affiliations
- 1. Division of Humanities and Social Sciences, California Institute of Technology, 1200 E California Boulevard, Pasadena, CA, 91125, USA