Thanks to huge efforts of Doby Rahnev, a large collection of open data on behavioral tasks using subjective ratings was just made available. The database contains (at current) 145 datasets, and is fully open for everyone to use. I added a couple of my own datasets on subjective difficulty, with the hope that people might find it interestingt to examine whether different types of ratings (confidence, subjective difficulty, etc.) show the same or different dynamics. I think this is a great, ambitious project, that can tremendously speed up model developments! The database itself can be found here, while a paper describing the database can be found on psyarxiv. If you want to help popularizing the database on twitter, here’s Doby tweet about it.