Identifying multiple devices used and/or worn by a panelist using step detections and/or counts

A non-transitory computer-readable storage medium, having stored thereon program instructions that, upon execution by a processor, cause performance of a set of operations comprising:

• obtaining a first set of motion sensing data associated with a first portable people meter (“PPM”) associated with a first panelist of a household, the first set of motion sensing data including a first number of steps over a period of time;
• obtaining a second set of motion sensing data associated with a second PPM associated with a second panelist of the household, the second set of motion sensing data including a second number of steps over the period of time;
• comparing the first number of steps and the second number of steps over the period of time;
• determining that the first number of steps of the first PPM and the second number of steps of the second PPM vary less than a tolerance threshold;
• and
• based on the first number of steps of the first PPM and the second number of steps of the second PPM varying less than the tolerance threshold, determining that duplicate wear of the first PPM and the second PPM occurred.

A computing system comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium, having stored thereon program instructions that, upon execution by the processor, cause performance of a set of operations comprising:
• obtaining a first set of motion sensing data associated with a first portable people meter (“PPM”) associated with a first panelist of a household, the first set of motion sensing data including a first number of steps over a period of time;
• obtaining a second set of motion sensing data associated with a second PPM associated with a second panelist of the household, the second set of motion sensing data including a second number of steps over the period of time;
• comparing the first number of steps and the second number of steps over the period of time;
• determining that the first number of steps of the first PPM and the second number of steps of the second PPM vary less than a tolerance threshold;
• and
• based on the first number of steps of the first PPM and the second number of steps of the second PPM varying less than the tolerance threshold, determining that duplicate wear of the first PPM and the second PPM occurred.