Search found 40 matches

by paolobernardis
18 Sep 2012, 10:42
Forum: BCI Systems - Signal Processing
Topic: CAR output list
Replies: 2
Views: 2436

Re: CAR output list

Thank you so much, your explanation was very helpful!
by paolobernardis
18 Sep 2012, 05:35
Forum: BCI Systems - Signal Processing
Topic: CAR output list
Replies: 2
Views: 2436

CAR output list

Dear all, I have a doubt concerning the CAR filter use during a 1D cursor task..assuming that I would like to use this kind of filter both in the calibration session and in the cursor task session, I should: - fill the "CAR output channels list" box with ALL the used channels, in both sessions; - fi...
by paolobernardis
24 Jul 2012, 04:35
Forum: BCI Systems - User Applications
Topic: cursor speed
Replies: 7
Views: 4400

Re: cursor speed

Dear Boulay, our normalizer window of the parameters file is filled with these values: offsets 0 0 gains 1 1 adaptation 0 0 buffer conditions (Feedback)&&(TargetCode==1) (Feedback)&&(TargetCode==2) Buffer lenght 9s Update trigger (Feedback==0) thank you again.
by paolobernardis
20 Jul 2012, 11:47
Forum: BCI Systems - User Applications
Topic: cursor speed
Replies: 7
Views: 4400

Re: cursor speed

Dear all, thank you, actually it helped a lot! :D now we are conducting again experiments, but we observed a strange behavior from the cursor task. Basically we run the calibration session for right movement and we than conducted offline analysis. We observed (both from the 'Feature plot' and the 's...
by paolobernardis
11 Jul 2012, 11:33
Forum: Data Analysis
Topic: P300 correlation
Replies: 1
Views: 2098

P300 correlation

Dear All, I read on BCI2000 wiki that "The coefficient of determination, or r^2 value, is a statistical measure computed over a pair of sample distributions, giving a measure of how strongly the means of the two distributions differ". So, if the two conditions (i.e. expected vs unexpected stimuli) s...
by paolobernardis
24 Jun 2012, 10:22
Forum: Data Analysis
Topic: P300 analysis
Replies: 4
Views: 3063

Re: P300 analysis

Dear Jurgen, thanks again for your previous support. Please be kindly informed that I was successful to obtain the plot with the same scale of all the electrods within the same condition. Now, I would like to plot with exactly the same scale limit the amplitude of P300 from different sessions (which...
by paolobernardis
22 Jun 2012, 11:27
Forum: Data Analysis
Topic: P300 analysis
Replies: 4
Views: 3063

Re: P300 analysis

Dear Juergen,
thank you so much: it perfectly worked, and you have been so nice.
Kind regards.
by paolobernardis
20 Jun 2012, 14:49
Forum: Data Analysis
Topic: P300 analysis
Replies: 4
Views: 3063

P300 analysis

Dear all, I am performing the analysis of data obtained in a P3Speller expeiment. For this prupose I am using the tool Offiline Analysis of BCI2000. I would like to knowe if is possible to plot the amplitude absolute values of the P300 of different electrodes (e.g. Pz, Fz, Oz) at the same time by us...
by paolobernardis
20 Jun 2012, 14:45
Forum: BCI Systems - Signal Processing
Topic: P300 analysis
Replies: 0
Views: 2746

P300 analysis

Dear all, I am performing the analysis of data obtained in a P3Speller expeiment. For this prupose I am using the tool Offiline Analysis of BCI2000. I would like to knowe if is possible to plot the amplitude absolute values of the P300 of different electrodes (e.g. Pz, Fz, Oz) at the same time by us...
by paolobernardis
13 Jun 2012, 10:17
Forum: Software Development
Topic: BCI 2000 and external device
Replies: 1
Views: 1770

BCI 2000 and external device

Dear All, We would like to configure the BCI2000, particularly CursorTask with an external device: STIWELL med4. The aim is a therapy of restoring lost mobility, also accelerated by using biofeedback functions (functional electro-therapy) with use of the STIWELL med4. Do you know if someone has alre...
by paolobernardis
08 Jun 2012, 06:05
Forum: BCI Systems - Brain Signals
Topic: CursorTask and STIWELL med4.
Replies: 0
Views: 2906

CursorTask and STIWELL med4.

Dear All, We would like to configure the BCI2000, particularly CursorTask with an external device: STIWELL med4. The aim is a therapy of restoring lost mobility, also accelerated by using biofeedback functions (functional electro-therapy) with use of the STIWELL med4. Do you know if someone has alre...
by paolobernardis
08 Jun 2012, 04:38
Forum: BCI Systems - User Applications
Topic: cursor speed
Replies: 7
Views: 4400

Re: cursor speed

Hi Juergen, first of all I would like to thank you for your quick reply. Actually we understood that if we increase the Feedback duration parameter we will obtain a decreased cursor speed, and vice versa. But what about if we want to quantify this speed? I mean, if we mantain a fixed Feedback durati...
by paolobernardis
07 Jun 2012, 09:43
Forum: BCI Systems - User Applications
Topic: cursor speed
Replies: 7
Views: 4400

cursor speed

Dear all, we were wondering if it is possible to know the maximal cursor speed that could be reached in the "cursor task application" (i.e. the time the cursor will take to cover the whole screen lenght), and if it possible to modify this value, or otherwise if it is a fixed configuration parameter ...
by paolobernardis
13 Mar 2012, 10:59
Forum: Data Analysis
Topic: 'single stimulus P3' information and statistics
Replies: 2
Views: 2704

'single stimulus P3' information and statistics

Dear All, we are working with the P300 spelling application..as far as I know, each time I create a plot using the "Offline analysis tool", I obtain two lines (correct/uncorrect) representing the mean response (within the data I am analysing) elicited by expected\unexpected stimuli. So, the lines re...
by paolobernardis
31 Jan 2012, 05:30
Forum: Data Analysis
Topic: P3Speller accuracy
Replies: 3
Views: 3573

Re: P3Speller accuracy

Dear Juergen, thank you very much for your reply. We tried to run the P3 Signal Processing chain, but we had some troubles. Following step by step your advice, you wrote: 'Run the P3 signal processing chain on the existing data, using the bci2000chain Matlab command from BCI2000/tools/Matlab' but un...