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Other techniques Snowball sample Voting Data Unobtrusive measures2%11 Survey Data\Most commonly used measure of public opinion Important to remember: Not necessarily the sameAccess to Public Opinion DataIRSS database http://www.irss.unc.edu/odum/jsp/content_node.jsp?nodeid=140 www.lib.umb.edu LexisNexis Academic Reference Polls/surveysdZ=ZZZ-Z?- B<   0J 0M\ 0]pSurvey Data--potential problems(Reliability Sampling Question wording Survey Data problemsReliability Most attitude scales social psychologists use have multiple measures Public opinion questions often measured with just a single question Sampling Question wording 6  Survey Data problemsiReliability Sampling Sampling error a function of sample size Biased sample selection Question wording 6BB Survey Data problems(Reliability Sampling Question wording  Question WordingYTwo different forms of the question: If a situation like Vietnam were to develop in another part of the world, do you think the United States should or should not send troops? 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