The State of Parallel Testing
November 21st, 2008 by R.S. CalloweIn some of my previous posts, I have investigated whether parallel testing can provide an adequate defense against fraudulent voting software. I concluded that parallel testing alone is an insufficient guarantee of election legitimacy, but I wanted to find out how many states even used parallel testing to verify their elections. I do not think parallel testing alone is enough, but it is surely at least a step in the right direction. So how widely is parallel testing actually used?
To find out, I first compiled a list of the 19 swing states that have been decided by 5% or less in the 2000, 2004, or 2008 elections. I then used voting machinery data from verifiedvoting.org to narrow the list to the 11 swing states that use electronic voting machines. Reliable data on actual election practices is hard to come by, so I called the board of elections in each of these states to ask about their parallel testing procedures. The results surprised me.
Of the six states that I was able to contact, five had never done any parallel testing of any sort. None had ever used parallel testing in a general election. The other states’ representatives either did not return multiple messages seeking information or refused to speak with me about parallel testing. Of the five states about which I was not able to obtain any official statements, my research indicates that only one of them has done parallel testing in the past, but this figure is still very preliminary.
For those who contend that we might catch fraudulent software with parallel testing of sufficient rigor, these numbers are sobering. In the last election, the vast majority of the states for which the result was in question did not use parallel testing at all. In short, there is a long way to go before parallel testing can even be considered to be implemented, much less be effective.
Fortunately, many of the states that do not use parallel testing have implemented a voter-verified paper trail (VVPT) on their electronic voting machines. For example, the Voting Systems Director of North Carolina told me that no counties in his state use parallel testing. Instead, he described his state’s method of using a “real time audit trail,” a VVPT, along with a random manual recount of a statistically significant number of machines. Of the 11 swing states I examined, five (Florida, Georgia, Indiana, Pennsylvania, and Tennessee) do not use a VVPT in conjunction with their electronic voting machines (Tennessee plans to move to a precinct optical scan system by 2010).
It seems that many states are beginning to do something about voting security: according to verifiedvoting.org, legislation that requires an auditable paper trail has passed in 31 states. These measures are positive steps — but parallel testing is nearly nonexistent in practice, and only some states use VVPT’s. We still have a long way to go.
