t-CWT: Multivariate Assessment
of Event-Related Potentials

Free and Open Source Software
for MATLAB and GNU Octave

Copyright © 2003-2017 Vladimir Bostanov <bostanov bioinformatics.org>

t-CWT comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it under certain conditions. See the Terms of Use below. For more details see the GNU General Public License.


Event-related brain potentials (ERPs) are usually assessed with univariate statistical tests although they are essentially multivariate objects. Brain-computer interface (BCI) applications are a notable exception to this practice. Multivariate ERP assessment can be facilitated by feature extraction methods. One such method is t-CWT, a mathematical-statistical algorithm based on the continuous wavelet transform (CWT) and Student's t-test.


A detailed description of the mathematical algorithm implemented by the t-CWT software as well as the results from the assessment of the example ERP data can be found in

Bostanov V. (2015). Multivariate Assessment of Event-Related Potentials with the t-CWT Method. BMC Neuroscience 16:73. doi:10.1186/s12868-015-0185-z BibTeX reference

The first version of t-CWT was introduced in

Bostanov V. (2004). BCI Competition 2003 – data sets Ib and IIb: feature extraction from event-related brain potentials with the continuous wavelet transform and the t-value scalogram. IEEE Trans Biomed Eng 51:1057-61. BibTeX reference

If you use t-CWT in your research, please cite, either Bostanov (2015), or both Bostanov (2015) and Bostanov (2004) – whichever fits best.


File Description
t-CWT.3.00.help.html t-CWT 3.00 (Mindfulness) Documentation
(also included in the t-CWT 3.00 ZIP archive).
t-CWT.2.01.help.html t-CWT 2.01 Documentation
(also included in the t-CWT 2.01 ZIP archive).


File Size Description
t-CWT.3.00.zip 200KB t-CWT version 3.00 (Mindfulness)
Source Code & Documentation
3.00 is much faster than 2.01 because of the semi-log-grid sampling of the scalogram
MD5: c5285123b637a49fddd725ae0ec56a6e
t-CWT.2.01.zip 180KB t-CWT version 2.01
Source Code & Documentation
MD5: af38affe40519687be723912aa487bed
t-CWT.example.ERP.data.zip 94MB Oddball ERPs, 27 ASCII datasets.
MD5: 322a35c5462da1fcb6931fe91f547d6f

Terms of Use

t-CWT is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.

t-CWT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty
See the GNU General Public License for more details.

BibTeX References

   author={Bostanov, Vladimir},
   title={Multivariate Assessment of Event-Related Potentials
      with the {t-CWT} Method},
   journal={BMC Neuroscience},
   author={Bostanov, Vladimir},
   title={{BCI} {C}ompetition 2003 - Data Sets {I}b and {II}b:
      {F}eature Extraction from Event-Related Brain Potentials with
      the Continuous Wavelet Transform and the t-Value Scalogram},
   journal={IEEE Trans Biomed Eng},