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Scaling Preferences Using Item Response Theory: Ideological Cohesion in Western Europe |
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Abstract:
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This paper uses item response theoretic models to investigate the distribution of political preference in Western Europe. Specifically, it tests whether preference distributions are skewed, and whether respondents on one end of the political spectrum are ideologically more cohesive than those at the other pole, giving their party an advantage. Item response theoretic model offer several significant advantages over classical scaling techniques, and have been very successfully applied in political science, most notably by Poole and Rosenthal (1998) to the scaling of roll-call data. Unfortunately, I find that item response theory is not particularly suitable for this application, due to the fact that there are a significant number of respondents with near perfect scores. |
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parti (61), fff (19), domin (18), item (18), distribut (18), polit (17), govern (17), elector (16), scale (15), right (14), respons (13), model (12), prefer (12), may (12), skew (12), vote (12), state (12), welfar (12), j (12), score (11), howev (10), |
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Association:
Name: American Political Science Association
URL: http://www.apsanet.org
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Citation:
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MLA Citation:
| McGann, Anthony. "Scaling Preferences Using Item Response Theory: Ideological Cohesion in Western Europe" Paper presented at the annual meeting of the American Political Science Association, Boston Marriott Copley Place, Sheraton Boston & Hynes Convention Center, Boston, Massachusetts, Aug 28, 2002 <Not Available>. 2009-05-27 <http://www.allacademic.com/meta/p65197_index.html> |
APA Citation:
| McGann, A. , 2002-08-28 "Scaling Preferences Using Item Response Theory: Ideological Cohesion in Western Europe" Paper presented at the annual meeting of the American Political Science Association, Boston Marriott Copley Place, Sheraton Boston & Hynes Convention Center, Boston, Massachusetts Online <.PDF>. 2009-05-27 from http://www.allacademic.com/meta/p65197_index.html |
Publication Type: Conference Paper/Unpublished Manuscript
Review Method: Peer Reviewed
Abstract: This paper uses item response theoretic models to investigate the distribution of political preference in Western Europe. Specifically, it tests whether preference distributions are skewed, and whether respondents on one end of the political spectrum are ideologically more cohesive than those at the other pole, giving their party an advantage. Item response theoretic model offer several significant advantages over classical scaling techniques, and have been very successfully applied in political science, most notably by Poole and Rosenthal (1998) to the scaling of roll-call data. Unfortunately, I find that item response theory is not particularly suitable for this application, due to the fact that there are a significant number of respondents with near perfect scores. |
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30 |
| Word count: |
2775 |
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| Scaling Preferences Using Item Response Theory: Ideological Cohesion in Western Europe Anthony J. M c Gann University of California Irvine Paper prepared for the Annual Meeting of the American Political Science Association Boston MA 8/29/20029/1/2002 1 This paper uses item response theoretic models to investigate the distribution of political preference in Western Europe. Specifically it tests whether preference distributions are skewed and whether respondents on one end of the political spectrum are ideologically more cohesive than those at the |
| sum of correct answers is a sufficient statistic for (any respondent with a given number of correct answers has the same expected underlying ). However it makes the strong assumption that all items discriminate equally amongst respondents at all levels of . The oneparameter lognormal model can be simply estimated using joint maximum likelihood (the likelihood of obtaining the response pattern given the values of and b to be estimated) or conditional maximum likelihood (the likelihood of |
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