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Question about DFA Method in Assessing Cognitive Effort #15

Open sunying2018 opened 6 years ago

sunying2018 commented 6 years ago

Thanks for sharing such an innovartive research in neuroscience. This research concludes that fractal scaling of BOLD fMRI signal is consistently suppressed by task difficulty, task novelty and aging effects. I am not familar with this area but just curious about how to determine if cognitive effort is related to different mono-fractal scaling regimes and higher-order multi-fractal scaling exponents and it can further use DFA-- a mono-fractal technique in assessing this multi-fractal analysis.

bermanm commented 6 years ago

We have found for the most part that this is a mono-fractal process. We haven't gained a lot by using wavelet analyses and measuring multi-fractal scaling components. The first dimension has been the one that has explained the most behavioral variance thus far in what we've tested. It's a good question, and it will be interesting to see what processes are multi-fractal.