| MLCM-package {MLCM} | R Documentation |
Estimate perceptual scales from data collected in a conjoint measurement experiment by maximum likelihood. Data for conjoint measurement are typically collected using a psychophysical procedure. The stimuli vary along n >= 2 dimensions. The observer views pairs of stimuli and judges which stimulus of each pair is higher on a specified dimension. For example, stimuli may be goods baskets containing amounts of milk and honey (dimensions) and the subject may order each pair of baskets by subjective desirability. This package contains functions to estimate the additive contribution of the n scales to the judgment by a maximum likelihood method under several hypotheses of how the perceptual dimensions interact.
| Package: | MLCM |
| Type: | Package |
| Version: | 0.0-1 |
| Date: | 2009-08-17 |
| License: | GPL |
| LazyLoad: | yes |
| LazyData: | yes |
| Built: | R 2.9.1; ; 2009-08-17 13:38:05 UTC; unix |
Index:
BumpyGlossy Conjoint Measurement Data for Bumpiness and
Glossiness
MLCM-package Estimate perceptual scales from a conjoint
measurement experiment by maximum likelihood
anova.mlcm Likelihood ratio tests for Maximum Likelihood
Conjoint Measurement models
logLik.mlcm Calculate log likelihood for Conjoint Measurement models
make.wide Create data frame for Fitting Conjoint Measurment
Scale by glm
mlcm Fit Conjoint Measurement Models by Maximum
Likelihood
plot.mlcm plot method for Maximum Likelihood Conjoint Measurement
models
print.mlcm print method for Maximum Likelihood Conjoint
Measurement models
print.summary.mlcm print method for summary of Maximum
Likelihood Conjoint Measurement models
summary.mlcm summary method for Maximum Likelihood Conjoint
Measurement models
Kenneth Knoblauch
Maintainer: Ken Knoblauch <ken.knoblauch@inserm.fr>
Luce, R. D., and Tukey, J. W. (1964). Simultaneous conjoint measurement. Journal of Mathematical Psychology, 1, 1–27.
Krantz, D. H., Luce, R. D., Suppes, P., and Tversky, A. (1971). Foundations of Measurement, Vol. 1: Additive and Polynomial Representations. New York: Academic Press.
Ho, Y. H., Landy. M. S. and Maloney, L. T. (2008). Conjoint measurement of gloss and surface texture. Psychological Science, 19, 196–204.
bg.acm <- mlcm(BumpyGlossy)
plot(bg.acm, pch = 21:22, bg = c("blue", "red"), col = "black",
ylab = "Contributions to Perceived Bumpiness")