MoodSwings is a collaborative game that incorporates your subjective judgements of the emotional content of music.

At the start of the game, you are partnered with another player anonymously across the internet. The goal of the game is for you and your co-player to agree on the mood of several short music clips along two dimensions:

valence: positive vs. negative emotions (top-bottom)
arousal: high- vs. low-intensity (left-right)

You make your ratings by moving your cursor (yellow) on the gameboard. You will see your partner's cursor (red) intermittently, every few seconds. The more overlap between your cursors, the more points you will score. The cursors become smaller over time as the clip plays, requiring the players to agree on their ratings more precisely to score points.

WARNING: Some songs in the MoodSwings music database contain explicit lyrics. We hope to offer an option to exlude these tracks in the near future.
NOTE: The game has not been fully tested with Internet Explorer

Human Computation 2010 Paper

Click here to play the MoodSwings PUBLIC BETA! (anonymous user registration required)

MoodSwings Single Player

To further test our system, and to obtain additional human feedback, we have incorporated a simplified version of our regression into MoodSwings to compensate for one of our most major issues with the game--that oftentimes no human partners are available online. Single-player games can be played using "partner" labels recorded from a prior game, but this eliminates songs for which annotations have not been previously recorded. Our previous solution was to intersperse use of an "AI" opponent that generates random labels centered around the player's position, which is relatively easy to detect and can be highly frustrating for a player. In our new solution, we implement our regression system limiting ourselves to only simple least-squares regression and spectral contrast features. During gameplay, we provide the second player's annotations at one-second intervals, which are projected from only the average spectral contrast over a two-second window. The "AI" is available for demo on the web anytime using MoodSwings Single Player, a limited version of the game which only uses the "AI" as the secondary player.