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qdm  

Fitting a Quadrilateral Dissimilarity Model to Same-Different Judgments
View on CRAN: Click here


Download and install qdm package within the R console
Install from CRAN:
install.packages("qdm")

Install from Github:
library("remotes")
install_github("cran/qdm")

Install by package version:
library("remotes")
install_version("qdm", "0.1-0")



Attach the package and use:
library("qdm")
Maintained by
Nora Umbach
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2014-10-27
Latest Update: 2014-10-27
Description:
This package provides different specifications of a Quadrilateral Dissimilarity Model which can be used to fit same-different judgments in order to get a predicted matrix that satisfies regular minimality [Colonius & Dzhafarov, 2006, Measurement and representations of sensations, Erlbaum]. From such a matrix, Fechnerian distances can be computed.
How to cite:
Nora Umbach (2014). qdm: Fitting a Quadrilateral Dissimilarity Model to Same-Different Judgments. R package version 0.1-0, https://cran.r-project.org/web/packages/qdm. Accessed 15 Jul. 2026.
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Complete documentation for qdm
Functions, R codes and Examples using the qdm R package
Some associated functions: FMrate . lightness . persp.qdm . predict.qdm . qdm . samediff . 
Some associated R codes: qdm.R . samediff.R .  Full qdm package functions and examples
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