EEG / ERP data available for free public download (updated 2020)


History of this page

Since there was no public database for EEG data to our knowledge (as of 2002), we had decided to release some of our data on the Internet. We have kept the page as it seems to still be usefull (if you know any database or if you want us to add a link to data you are distributing on the Internet, send us an email at arnosccn.ucsd.edu).

Data originally distributed on this page

On this page was a collection of 32-channel data from 14 subjects (7 males, 7 females) acquired using the Neuroscan software. Subjects are performing a go-nogo categorization task and a go-no recognition task on natural photographs presented very briefly (20 ms). Each subject responded to a total of 2500 trials. Data is CZ referenced and is sampled at 1000 Hz (total data size is 4Gb; more details are given later). The original distribution is available here for historical purposes. The current data is availlable on Openneuro.

The OpenNeuro and NEMAR databases

OpenNeuro is well known data archive created by Poldrack and his team at Stanford University. OpenNeuro is a free and open platform that allows researchers to upload and share neuroimaging data. Submitted datasets can then be analyzed by anyone who logs in. OpenNeuro has been designated by the NIMH as a repository for data collected from BRAIN Initiative projects as well as other types of human neuroimaging data; however, to date workflows only exist for fMRI data. This means that even if other types of brain scans were uploaded to OpenNeuro, there is no infrastructure in place for data analysis. We invite you to explore EEG BIDS formatted datasets available on OpenNeuro.

Partnering with Stanford University, we have received $4.4M from NIMH to create the Neuroelectromagnetic Data Archive and Tools Resource (NEMAR). Researchers will create the Neuroelectromagnetic Data Archive and Tools Resource at San Diego Supercomputer Center. The NEMAR platform is in its testing phase and will soon expand OpenNeuro capabilities to archive and visualize BIDS EEG dataset.

Other data available on the Internet

Datasets in Matlab (from the EEGLAB software tutorial) are Other EEG databases or datasets known to us are
Some datasets used in Brain Computer Interface competitions are also available at You may also look at a message ciculated on the EEGLABLIST that may point to other databases.