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Development of Appropriate Test Markings for Optical Scan Voting Machines, Phase 1: Ballot Scanning and Collection



Mitch Trachtenberg, David W. Flater


Three hundred thousand optical scan ballots cast in three United States jurisdictions have been scanned at high resolution in order to analyze voter behavior in marking ballots. Each jurisdiction uses a different vote target style: oval, box, or broken arrow. Unusual markings are summarized. Subsequent reports will classify the complete set of ballot markings and will develop an appropriate set of markings suitable for testing optical scan voting machines as well as a protocol for generating marks from the test set.
NIST Voting Publications


voting, ballot, optical scan, election, ballot marking, election auditing
Created May 2, 2011, Updated February 19, 2017