methods of research are used: CATI: Computer-assisted telephone interviewing CAPI: computer-assisted personal interviewing (by interviewer) CASI: computer-assisted self interviewing (respondent receives questions via modem) CAWI: computer-assisted web interviewing (respondent visit site) Qualitative research The appropriate research form depends on the subject and target group. Logo In 2003, when company went from being Taylor Nelson Sofres with several local names to one unified TNS, a new logo was designed. Wolff Olins was the agency behind the 2003 rebrand. Daniella Meirelles, a Brand Consultant at Wolff Olins was the one who brought the global project to the agency. Then in early 2012 the old logo was altered further. See also Official statistics Data Mining Cold Calling Custom online panel References External links TNS NIPO website Companies based in Amsterdam Companies established in 1997 Companies formerly listed on the London Stock Exchange Market research companies of the United Kingdom WPP plc