The survey was conducted by telephone with a national sample of adults (18 years of age or older) living in all 50 U.S. states and the District of Columbia. The results reported here are based on ...
Writing an effective questionnaire is not a task for novices. At the very least, it requires an understanding of four basic issues: Considering the differences between a questionnaire that respondents ...
The analysis in this report is based on a survey conducted August 7-14, 2013 among a sample of 1,052 adults, 18 years of age or older. The survey was conducted by the GfK Group using KnowledgePanel, ...