Detecting content consumption

A non-transitory computer storage medium encoded with a computer program, the program comprising instructions that when executed by one or more data processing apparatus cause the one or more data processing apparatus to perform operations comprising:

• receiving, for a user, interaction data generated by a script embedded in a resource based on interactions with content of the resource;
• determining, using the interaction data generated by the script, at least one of an amount of time that the content was on-screen or an amount of the resource viewed;
• determining, using the interaction data generated by the script, input device interactions comprising at least one of cursor interaction with the content, selection of the content, or scrolling of the resource;
• and
• determining a first rate of engagement with the resource based at least in part on the input device interactions and the at least one of the amount of time that the content was on-screen or the amount of the resource viewed;
• receiving a request for a content item to be provided to the user;
• determining, based on the interaction data, the user as being in a first engagement category from at least two different engagement categories by matching the first rate of engagement to a rate of engagement associated with the first engagement category;
• and
• selecting a content item to present to the user in response to the request based at least in part on determining that the user is in the first engagement category.

A system comprising:

• a data storage device storing a content item provided by a content item provider;
• and
• one or more data processing apparatus that interact with the data storage device and execute instructions that cause the one or more data processing apparatus to perform operations comprising:
• receiving, for a user, interaction data generated by a script embedded in a resource based on interactions with content of the resource;
• determining, using the interaction data generated by the script, at least one of an amount of time that the content was on-screen or an amount of the resource viewed;
• determining, using the interaction data generated by the script, input device interactions comprising at least one of cursor interaction with the content, selection of the content, or scrolling of the resource;
• and
• determining a first rate of engagement with the resource based at least in part on the input device interactions and the at least one of the amount of time that the content was on-screen or the amount of the resource viewed;
• receiving a request for a content item to be provided to the user;
• determining, based on the interaction data, the user as being in a first engagement category from at least two different engagement categories by matching the first rate of engagement to a rate of engagement associated with the first engagement category;
• and
• selecting a content item to present to the user in response to the request based at least in part on determining that the user is in the first engagement category.