Hello Hannah,

There really is no specific DV noted in the article, as it merely summarizes and explains an ersatz family of variables subsumed under the title, 'paradata.'

The general gist is, with accurate paradata (additional information about the responses/respondents' behaviors), perhaps one could better impute likely responses for those who demur from responding to a specific question or series of questions. However there are, apparently, numerous issues yet to be resolved associated with the use of such data for 'making more complete' for a given survey.

For those interested in the article, here is a link: Article Paradata in Survey Research

Good luck with your work.