Nik Murphy

9 Questions 28 Answers 0 Followers

Questions related from Nik Murphy

How best to classify similar waveforms across individuals?

I've performed clustered ensemble empirical mode decomposition on individual subjects and wish to study these at the group level. However, given the slight variation between subjects I am thinking...

01 January 2017 1,588 2 View

How to statistically compare spectral coherence at the group level?

Hi, I'm currently trying to estimate spectral coherence between two signals recorded from the same channel in two different conditions. This is fine when applying this to an individual subject,...

08 August 2016 1,315 5 View

Is there a toolbox available for performing topographic anova?

I'm looking at trying to replicate the methods described in http://nemo.nic.uoregon.edu/wiki/images/6/65/JBrain_Topogr_2008_Murray_Topographic_ERP_analyses_a_step_by_step.pdf but first wanted to...

07 July 2016 7,673 2 View

How to calculate inter-electrode distances from EEG channel locations (EEGLAB)?

Hi, I am wanting to work out which electrodes are within 4cm of each electrode on a 128 channel montage using the information in the EEGLAB EEG.chanlocs file. Is there a function set up to do...

07 July 2016 280 7 View

Data driven approaches to event related potential analysis?

Hi all. I'm currently trying to expand upon an analysis in which I only used a small selection of channels as my ROI, and now I'm considering a data driven approach. Is there a consensus on the...

05 May 2016 272 3 View

How do I best identify and remove resting tremor from EEG data?

Hi all, I'm currently trying to analyse resting state EEG data from a group of PDD patients. This was a fairly trivial task in the controls, but for some of the patients their low frequency...

01 January 2015 9,763 8 View

Is it possible to use non-parametric permutations for an f-test in event related potential research?

Was wondering if it is possible to run a non-parametric permutation test (preferably cluster corrected) for an anova design. I'm currently trying to find the best method for deriving the...

11 November 2014 3,699 3 View

Is there a quantitative method for evaluating which independent components to remove from a TMS-EEG dataset?

I have written a procedure to pre-process combined TMS-EEG data, using independent component analysis to reduce the extent of the tms artefact in the eeg signals. I have been able to reduce the...

01 January 2014 6,184 6 View

Does anyone have experience reading .cnt and .trg files into FieldTrip?

I'm currently having problems attempting to use FieldTrip for the pre-processing of TMS-EEG data. Until recently I've been using the ANT EEPimport functions and then transforming the data using...

10 October 2013 6,709 1 View