creator Huang, Jialin advisor Mead, Alan The study was designed to investigate how item writing would affect psychometric properties of personality measurements. New personality items were developed based on ideal point and dominance models, which were analyzed in the generalized graded unfolding model (GGUM), and two personality scales were constructed. Writing dominance items were slightly easier (more successful) than writing ideal point items, but this varied slightly by personality dimensions. Of three tactics for writing ideal point items trying to identify neutral items was less effective than appealing to an average or using double-barreled items. Scales constructed using ideal point items had substantially inferior psychometric properties as compared to scales created using dominance items, including lower reliability, lower validity and mixed test information results. However, lower validity of ideal point scales may be due to lower reliability of the measurements. Practical and methodological implications were also discussed in the paper. Submitted by Liana Khananashvili (khananashvili@iit.edu) on 2013-08-09T20:38:18Z No. of bitstreams: 1 121118Ideal Point Models Items fitnessV14.pdf: 806392 bytes, checksum: 098af568c69795261f0fc960300238c3 (MD5) Made available in DSpace on 2013-08-09T20:38:18Z (GMT). No. of bitstreams: 1 121118Ideal Point Models Items fitnessV14.pdf: 806392 bytes, checksum: 098af568c69795261f0fc960300238c3 (MD5) Previous issue date: 2012-12 M.S. in PSYCHOLOGY, December 2012 2012-11-11 2012-12 http://hdl.handle.net/10560/3022 en Thesis born digital application/pdf In Copyright http://rightsstatements.org/page/InC/1.0/ Restricted Access PSYCH / Institute of Psychology Illinois Institute of Technology Affiliated department