id author title date pages extension mime words sentence flesch summary cache txt 1z40ks67c16 Quinn Nathaniel Lathrop The Impact of Within-Template Systematic Variation on Response Models 2013 .txt text/plain 81 6 41 With item response data, systematic variation within nested groups of generated items may negatively impact the estimation of item and person parameters. First, explaining and removing non-random error may improve ability and item parameter estimates. cache/1z40ks67c16.txt txt/1z40ks67c16.txt