Algonauts 2021
The Algonauts dataset provides human brain responses to a set of 1,102 3-s long video clips of everyday events. The brain responses are measured with functional magnetic resonance imaging (fMRI). fMRI is a widely used brain imaging technique with high spatial resolution that measures blood flow changes associated with neural responses. Splits: Training: The training set consists of 1,000 video clips and the associated brain responses. The brain responses are provided here in two tracks corresponding to two independent tracks in the Algonauts challenge. In the first track, brain responses provided are from a set of specific regions of interest (ROIs) known to play a key role in visual perception. These ROIs start in early and mid-level visual cortex (V1, V2, V3, and V4) and extend into higher-level cortex that responds preferentially to all objects or particular categories (Body- EBA; Face - FFA, STS; Object - LOC; Scene - PPA). In the second track, brain responses provided are from selected voxels across the whole brain showing reliable responses to videos. Test: The test set consists of 102 short videos. The associated brain responses will be released at a later date. For further details see here.