Braindr data collection
A total of 261 users submitted over 80,000 ratings. We selected the 25% of the users who rated the largest numbers of the gold-standard slices. This reduced the dataset to 65 users who submitted 68,314 total ratings, 18,940 of which were on the 1000 gold-standard slices. Figure \ref{358654} shows the distribution of average ratings and the distribution of number of ratings per slice on the gold-standard dataset.