'extensive focus group' is correct and usable in written English.
You can use it when you want to refer to a large-scale effort to gather feedback or opinions from a large group of people. For example, "The marketing department conducted an extensive focus group to ask customers about their experiences with our product."
And we supplement this with extensive focus group work with children from a whole variety of backgrounds, circumstances and abilities.
Microsoft just gave its budding IPTV service a shot in the arm and renamed it Mediaroom, which is surely the product of several months of extensive focus group testing.
We suspect the drive for high dose MDMA pills over the last couple of year has not been the result of extensive focus group conducted by MDMA manufacturers and suppliers of typical users across the world," Dr Winstock says.
The assessment team conducted extensive focus group discussions with youth and stakeholders involved in youth programming and surveys with Zimbabwean youth ages 10 to 35 years, in addition to interviews and surveys with a broad range of stakeholders from civil society, educational institutions, and the private and public sectors.
The extensive focus group work during the development of the WHOQOL-SRPB noted the importance of these facets to QOL [ 14], and future research may thus attempt to re-word these facets so that they are expressed as spiritual QOL rather than spiritual coping.
The complex was created with "extensive focus groups, surveys and coordination with Facebook," the press release states.
Most recently, the team developed a Tagalog survey instrument through extensive focus groups and piloting, and as of mid-September 201,500,500 households have been surveyed.
The storyline was developed after extensive focus groups and interviews with people on the autism spectrum as well as with input from the National Autistic Society, the Autism Research Trust and the University of Cambridge Autism Research Centre.
The document is a result of extensive focus groups conducted with 35 white voters in Macomb County, Michigan, who didn't have college degrees, had voted for Obama at least once, and identified as "independents, Democratic-leaning independents, or Democrats".
In addition, all of the child-report items had undergone extensive focus groups with parents and children as well as cognitive interview testing [ 22, 23].
