Methods and apparatus to detect a presence status

A non-transitory machine readable storage medium comprising instructions that, when executed, cause a processor to perform operations comprising:

• obtaining, from a portable meter and via a network, portable meter data in response to a prompt transmitted via the network to the portable meter, the prompt transmitted in response to detecting a presence of the portable meter at a media presentation environment, wherein the portable meter is associated with a user at the media presentation environment;
• obtaining, from a device meter and via the network, device meter data, wherein the meter device is associated with a media presentation device disposed at the media presentation environment;
• determining a similarity score characterizing a degree of similarity between the portable meter data and the device meter data;
• determining whether the similarity score is above a threshold;
• and
• based on determining whether the similarity score is above the threshold, generating a presence status characterizing a presence of the user at the media presentation environment.

An audience measurement computing system comprising:

• a processor;
• and
• a memory storing instructions that, when executed by the processor, cause the audience measurement computing system to perform operations comprising:
• obtaining, from a portable meter and via a network, portable meter data in response to a prompt transmitted via the network to the portable meter, the prompt transmitted in response to detecting a presence of the portable meter at a media presentation environment, wherein the portable meter is associated with a user at the media presentation environment;
• obtaining, from a device meter and via the network, device meter data, wherein the meter device is associated with a media presentation device disposed at the media presentation environment;
• determining a similarity score characterizing a degree of similarity between the portable meter data and the device meter data;
• determining whether the similarity score is above a threshold;
• and
• based on determining whether the similarity score is above the threshold, generating a presence status characterizing a presence of the user at the media presentation environment.