| 摘要 |
Systems and methods for gathering research data using multiple monitoring devices are provided. At least a pair of the monitoring devices each read ancillary codes contained within media data and which represents research data. The decoded data read by at least one of the pair is associated with a further set of data offering a correspondence between each of the sets of decoded data. Such correspondence allows a determination that the data decoded by each of the pair of monitoring devices is the same.
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