Using Paradata to Improve Questionnaire Design and Operations Aneesah Williams Governments Division U.S. Census Bureau Introduction Paradata are data about the process by which survey data are collected. Due to the emergence of computer assisted surveys, paradata are now able to be captured through key-strokes of respondents, time stamps of movement, and navigation patterns throughout the questionnaire.  For surveys administered by a field representative, there are also paradata captured through interviewer observations, vocal properties of interviewer and respondents, and interviewing strategies (Kreuter, 2010). We can extend the definition of paradata to include any evaluation that we learn from and use to revise our process. In the Governments (GOVS) Division, we plan to use several sources of paradata to improve our questionnaires and to improve our data processing. This paper will give a brief description of the various types of paradata and the benefits to be gained from applying the information received from these paradata into our survey processing.