# Nielsen television measurement methodology updates > Live situation record from CLSTR: https://clstr.news/situations/nielsen-television-measurement-methodology-updates > Updated: 2026-08-22T14:14:35.000Z. Sources: 13. Developments: 2. Nielsen is preparing to implement significant updates to its television audience measurement methodology ahead of the 2026-27 broadcast season. These changes include enhancements to its ‘Big Data + Panel’ currency and a focus on more accurate co-viewing measurement through the use of proprietary wearable devices to capture audio. The rollout has met with industry concern. The NFL has described the implementation as ‘rushed’ and warned that the new methodology could lead to muddled or underreported audience numbers, potentially affecting advertising value. Consequently, the league is reportedly exploring alternative measurement providers. Other sectors, including professional wrestling promotions like WWE and AEW, are also bracing for the August 31 adjustment. Because viewership metrics in key demographics are critical for negotiating media rights deals, there is uncertainty regarding the impact. However, the new methodology may place a greater emphasis on Hispanic-American audiences, a shift that could potentially benefit industries with strong following among Mexican-American viewers. ## Timeline ### 2026-08-22: Nielsen measurement changes threaten to impact WWE and AEW ratings An upcoming Nielsen television measurement adjustment on August 31 could significantly impact viewership data and advertising revenue for professional wrestling promotions like WWE and AEW. 2 sources. https://clstr.news/cluster/nielsen-measurement-changes-threaten-to-impact-wwe-and-aew-ratings ### 2026-08-19: NFL disputes Nielsen’s new TV viewership measurement methodology The NFL is criticizing Nielsen’s upcoming changes to TV viewership measurement, citing concerns that new co-viewing methodologies may inaccurately report sports audience sizes. 11 sources. https://clstr.news/cluster/nielsen-introduces-passive-co-viewing-measurement-for-tv-ratings --- Cite as: Nielsen television measurement methodology updates. CLSTR, https://clstr.news/situations/nielsen-television-measurement-methodology-updates