(Reuters) - Nielsen Holdings NV, the television viewership measurement company, said on Monday it will partner with Twitter to publish a new set of ratings that measure chatter on Twitter about TV programming.
The new ratings, to be launched next fall, arrive at a moment when media and advertising industry executives say they are observing a shift in TV viewing habits that include the rise of "second screen" use.
But significant questions remain for advertisers over how best to interpret the data and whether a Twitter ratings system is meaningful at all.
In September, Nielsen ratings showed that TV viewership for Viacom Inc's MTV Video Music Awards, which coincided with the Democratic National Convention, plummeted by more than 50 percent from a year ago. Yet social media chatter tripled, according to the research firm Trendrr.
Brad Adgate, an analyst at Horizon Media, said advertisers will view the Twitter ratings as a useful layer of information about a show's popularity, but it is "not going to be close to the currency" of existing ratings metrics.
