They came from eight studies of children's views. The way we analyzed these is we assessed first of all the quality of the research methods employed in those studies, and then we always had two researchers working independently who would look at what the findings were in those studies--look through them, read them, reread them, code them for different concepts and try to understand how those concepts were linked, both within the studies and between the studies, and then build up a picture across all of the studies. When the researchers had done the work independently they then met to discuss what they'd worked at independently, find out how similar and how different they were, and then come to some agreement as to what they'd found.
On February 26th, 2007. See this statement in context.