Utilities to Fit Paired Comparison Models for Preferences

Generates design matrix for analysing real paired comparisons and derived paired comparison data (Likert type items/ratings or rankings) using a loglinear approach. Fits loglinear Bradley-Terry model (LLBT) exploiting an eliminate feature. Computes pattern models for paired comparisons, rankings, and ratings. Some treatment of missing values (MCAR and MNAR). Fits latent class (mixture) models for paired comparison, rating and ranking patterns using a non-parametric ML approach.


News for Package 'prefmod'

Changes in Version 0.8-34:

• Corrected the coding of the rating-scale items of the ISSP 2000. 'CAR', 'IND', 'FARM', 'WATER', 'TEMP', and 'GENE' were coded 0 (dangerous) to 4 (not dangerous) instead of 1 (dangerous) to 5 (not dangerous).

• 'plotworth()' is defunct - use 'plot()' (or 'plot.wmat') instead.

• Minor fixes and improvements.

Reference manual

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0.8-34 by Marco Johannes Maier, 4 years ago

Browse source code at https://github.com/cran/prefmod

Authors: Reinhold Hatzinger [aut] , Marco Johannes Maier [cre]

Documentation:   PDF Manual  

Task views: Psychometric Models and Methods, Missing Data

GPL (>= 2) license

Imports grDevices, utils

Depends on stats, graphics, gnm, colorspace

Imported by PLMIX.

Suggested by BradleyTerry2, PlackettLuce, smacof.

See at CRAN