Capital One, Samsung Electronics, Unilever, e-Rewards and Western Wats have all signed up.

Yongjoo Park of Samsung said the move was “a unique opportunity to develop a solution that improves research quality for our entire industry”.

John Ouren (pictured), general manager and EVP of panels and communities and MarketTools, said the addition of the new members “demonstrates the industry support that TrueSample has garnered as a proven solution for achieving consistent quality across all online research.”

The group, which meets in person twice a year, now includes members from ten companies, including MarketTools itself, as well as General Mills, Microsoft, Procter & Gamble and Toluna.

Meanwhile research agencies GfK and Kantar recently launched a not-for-profit MR industry consortium to come up with industry-wide online quality tools, and are inviting companies to join up.