By Robert E. Kass, Uri T. Eden, Emery N. Brown
Continual advancements in information assortment and processing have had a big impact on mind study, generating information units which are usually huge and complex. by way of emphasizing a couple of primary ideas, and a handful of ubiquitous thoughts, Analysis of Neural Data presents a unified therapy of analytical equipment that experience develop into crucial for modern researchers. during the publication rules are illustrated with greater than a hundred examples drawn from the literature, starting from electrophysiology, to neuroimaging, to behaviour. by means of demonstrating the commonality between quite a few statistical techniques the authors give you the an important instruments for gaining wisdom from diversified forms of facts. aimed toward experimentalists with basically high-school point arithmetic, in addition to computationally-oriented neuroscientists who've constrained familiarity with records, Analysis of Neural Data serves as either a self-contained creation and a reference work.
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Extra resources for Analysis of Neural Data
4 displays a histogram (with dots replacing bin heights) of the BOLD values collected from 19,000 voxels for each of 15 subjects and 15 images under their control condition, during which the subjects were fixating on a central spot on the screen they were watching. It is apparent that this distribution across voxels is quite skewed. The authors produced various plots aimed at suggesting the log transformation could be useful. The way we usually think of the log transformation is that it produces a more “natural” scale for measurements whenever they are necessarily positive and might reasonably be compared in proportional relationships.
But how convincing is it that she chose the non-burning house on 14 out of 17 trials? Might she have been guessing? S. had chosen 17 out of 17 trials there would have been very strong evidence that her processing of the visual information affected her decision-making, while, on the other hand, a choice of 9 out of 17 clearly would have been consistent with guessing. The intermediate outcome 14 out of 17 is of interest as a problem in data analysis and scientific inference precisely because it feels fairly convincing, but leaves us unsure: a thorough, quantitative analysis of the uncertainty would be very helpful.
7 Electrooculogram smoothing for EEG artifact removal EEG recordings suffer from a variety of artifacts, one of which is their response to eye blinks. A good way to correct for eye-blink artifacts is to record potentials from additional leads in the vicinity of the eyes; such electrooculograms (EOGs) may be used to identify eye blinks, and remove their effects from the EEGs. Wallstrom et al. (2002, 2004) investigated methods for removing ocular artifacts from EEGs using the EOG signals. In Chapter 15 it will become clear how to use a general smoothing method to remove high-frequency noise.