Collaborative Filtering at Last.fm

By Deane Barker on July 7, 2003

Wired News: Last.fm: Music to Listeners’ Ears: An Internet radio station is trying something new to figure out what its listeners want to hear:

“Users can either fill out a profile or just begin listening. If a song plays to the end, the system logs this as a thumbs up. But if the user doesn’t like a song and hits the Change button in the Last.fm player, it’s marked as a thumbs down. Over time, a preference profile is built. By comparing the preference profiles of its listeners, the system can predict what songs a particular listener might like, based on the overlap with other listeners with similar tastes.”

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