NeurIPS 2025 EEG Foundation Challenge: From Cross-Task to Cross-Subject EEG Decoding

Hi Bruno and other Authors!
First of all, thank you for this amazing challenge.
I was going through the challenge but it seems so convoluted that I am not able to figure out the 1st task completely. On your website you say,

  • “Participants will train models on passive EEG tasks (Resting State, Surround Suppression, Movie Watching) and evaluate their performance on active tasks (Contrast Change Detection, Sequence Learning, Symbol Search)”

and in your proposal you specifically mention,

  • Section 1.3: “For this challenge, the contestants must predict behavioural performance metrics in an active task (Contrast Change Detection, CCD): response time relative to the start of contrast change and success rate (hit accuracy)”
  • Section 1.4: “Contestants will predict behavioural performance (response time and success rate) in the Contrast Change Detection (CCD) task using EEG data from the Surround Suppression (SuS) task and pre-trial EEG”

So, can you please explain what we have to do?