How different polls influence voting intention
Telephone interviews reach more people, but face-to-face interviews tend to produce more honest answers. Polls released daily risk being based on 'statistical chance' and 'inventing facts'.
Latest news and stories about polling methodology in Portugal for expats and residents.
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Telephone interviews reach more people, but face-to-face interviews tend to produce more honest answers. Polls released daily risk being based on 'statistical chance' and 'inventing facts'.