The Census Quality Survey (CQS) was conducted in order to estimate measurement error, such as simple response variance, from a census Internet questionnaire compared to that from a census paper questionnaire (Hill, Reiser, & Bentley, 2010). This report lists the findings from the first two rounds of usability testing of the instrument prior to implementation. The results showed that participants completed the form quickly and without major difficulty. They did not tend to use help links or instructions. Additionally, some participants excluded or made up some information about the people that lived with them.