Logic and Accuracy Testing: A Fifty-State Review

Pre-election logic and accuracy (L&A) testing is a process in which election officials validate the behavior of voting equipment by casting a known set of test ballots and confirming the expected results. Ideally, such testing can serve to detect certain forms of human error or fraud and help bolster voter confidence. We present the first detailed analysis of L&A testing practices across the United States. We find that while all states require L&A testing before every election, their implementations vary dramatically in scope, transparency, and rigorousness. We summarize each state's requirements and score them according to uniform criteria. We also highlight best practices and flag opportunities for improvement, in hopes of encouraging broader adoption of more effective L&A processes.

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