Methods, apparatus, and systems to collect audience measurement data

An apparatus to collect audience measurement data comprising:

• a people meter to collect audience identification data during a first time period;
• a media measurement device to collect first media identification data during the first time period and second media identification data during a second time period after the first time period, the second media identification data collected without collecting audience measurement data from the people meter, the people meter removed during the second time period;
• and
• a behavior processor to:
• develop audience member behavior data based on the first media identification data and the audience identification;
• and
• identify the audience members associated with the second media identification data based on the audience member behavior data.

A machine-readable storage device or storage disk comprising instructions which, when executed, cause a machine to at least:

• develop audience member behavior data based on first media data and audience identification data collected with a people meter over a first time period;
• collect second media data after the people meter has been removed, the removal of the people meter occurring after the audience member behavior data has been developed;
• and
• identify audience members associated with the second media data based on the audience member behavior data and without collecting audience identification data.

A method of collecting audience measurement data in a monitored household, the method comprising:

• collecting first media data via a base metering device;
• collecting audience identification data with a people meter;
• developing, with a first processor, audience member behavior data based on the first media data and the audience identification data;
• collecting second media data after the people meter has been removed, the second media data collected by a service provider associated with the second media data, the removal of the people meter occurring after the audience member behavior data has been developed;
• and
• identifying, with at least one of the first processor or a second processor, audience members associated with the second media data based on the audience member behavior data.