System and method of personalizing playlists using memory-based collaborative filtering

A server system, for producing a recommendation score personalized to a user for an item, comprising:

• one or more processors;
• and
• memory storing one or more programs to be executed by the one or more processors;
• the one or more programs comprising instructions for:
• generating for display to a target user, during playback of a first media content item to the target user, a user interface for indicating either a like rating or a dislike rating for the first media content item, the like rating and dislike rating together forming a binary rating scheme;
• receiving from the target user a selection of the like rating for the first media content item;
• obtaining, by the one or more processors, from a like matrix a first score for a target media content item based on ratings provided by a first plurality of users who selected the like rating during playback of the first media content item, the target media content item different from the first content media item, the like matrix including information indicating whether the first plurality of users selected the like rating or the dislike rating from the binary rating scheme during playback of the target media content item;
• generating for display to the target user, during playback of a second media content item to the target user, the user interface including the binary rating scheme;
• receiving from the target user a selection of the dislike rating for the second media content item, the second media content item different from the first media content item and the target media content item;
• obtaining, by the one or more processors, from a dislike matrix a second score for the target media content item based on ratings provided by a second plurality of users who selected the dislike rating during playback of the second media content item, the dislike matrix including information indicating whether the second plurality of users selected the like rating or the dislike rating from the binary rating scheme during playback of the target media content item;
• combining, by the one or more processors, the first score and the second score to produce a recommendation score for the target media content item for the target user;
• and
• in response to the recommendation score being above a threshold, providing, over a network, the target media content item to the target user.

A non-transitory computer readable storage medium storing one or more programs configured for execution by a server system, the one or more programs comprising instructions for:

• generating for display to a target user, during playback of a first media content item to the target user, a user interface for indicating either a like rating or a dislike rating for the first media content item, the like rating and dislike rating together forming a binary rating scheme;
• receiving from the target user a selection of the like rating for the first media content item;
• obtaining, by a processor, from a like matrix a first score for a target media content item based on ratings provided by a first plurality of users who selected the like rating during playback of the first media content item, the target media content item different from the first content media item, the like matrix including information indicating whether the first plurality of users selected the like rating or the dislike rating from the binary rating scheme during playback of the target media content item;
• generating for display to the target user, during playback of a second media content item to the target user, the user interface including the binary rating scheme;
• receiving from the target user a selection of the dislike rating for the second media content item, the second media content item different from the first media content item and the target media content item;
• obtaining, by the processor, from a dislike matrix a second score for the target media content item based on ratings provided by a second plurality of users who selected the dislike rating during playback of the second media content item, the dislike matrix including information indicating whether the second plurality of users selected the like rating or the dislike rating from the binary rating scheme during playback of the target media content item;
• combining, by the processor, the first score and the second score to produce a recommendation score for the target media content item for the target user;
• and
• in response to the recommendation score being above a threshold, providing, over a network, the target media content item to the target user.