Search found 5 matches

by sophie
21 Feb 2020, 10:15
Forum: Data Analysis
Topic: What being fed into the SWLDA
Replies: 5
Views: 45

Re: What being fed into the SWLDA

Thank you, Juergen! One last question, you mentioned "would not want to include frontal/parietal electrodes because you expect them to have more noise than signal." Is that because the frontal site is near the eyes? Why would the parietal electrodes have more noise than signal? Why would we exclude ...
by sophie
13 Feb 2020, 17:49
Forum: Data Analysis
Topic: What being fed into the SWLDA
Replies: 5
Views: 45

Re: What being fed into the SWLDA

Thank you so much Juergen! If I recorded using 8-channel cap and sampled at 256 Hz, then it would be 800-ms segments of data following each intensification from all 8 channels being fed into the SWLDA? and it will be downsampled to ~204 (256x0.8)sample?
by sophie
12 Feb 2020, 21:05
Forum: Data Analysis
Topic: What being fed into the SWLDA
Replies: 5
Views: 45

What being fed into the SWLDA

Hello all:

I am very new to the P300 speller. As I use only the GUIs to analyze data, but what are the features fed to SWLDA? Is it raw continuous data from all 8 channels (I use 8-electrode cap), or filtered data? is it downsampled or sampled at 256 hz? where do I find this information?

Thank you!
by sophie
28 Jan 2020, 20:38
Forum: Data Analysis
Topic: How to extract ERPs for each individual letter from a .dat file
Replies: 2
Views: 45

Re: How to extract ERPs for each individual letter from a .dat file

Thank you so much Jürgen! That is very helpful!
by sophie
21 Jan 2020, 16:51
Forum: Data Analysis
Topic: How to extract ERPs for each individual letter from a .dat file
Replies: 2
Views: 45

How to extract ERPs for each individual letter from a .dat file

Hello all, The task was a calibration phase of P300 speller with the checkerboard paradigm.The .dat file was generated from copy-spelling 5 letters in a run. How to segment this file into 5 files so that each contains data for one letter selection? Could someone please point me in right direction? T...