http://www.surveyusa.com/methodology.htmlSurveyUSA is the first research company to appreciate that opinion research can be made more affordable, more consistent and in some ways more accurate by
eliminating the single largest cost of conducting research, and a possible source of bias:
the human interviewer.http://www.surveyusa.com/client/PollReport.aspx?g=874ea794-a227-44a0-a81b-bdc09dd92facRespondents reachable on a home telephone (64% of likely voters) were interviewed on their home telephone in the
recorded voice of a professional announcer. Respondents not reachable on a home telephone (36% of likely voters) were shown a questionnaire on the display of their smartphone, tablet or other electronic device.