A regression framework for response variables which are continuous selfrating scales such as the Visual Analog Scale (VAS) used in pain assessment, or the Linear Analog SelfAssessment (LASA) scales in quality of life studies. These scales measure subjects' perception of an intangible quantity, and cannot be handled as ratio variables because of their inherent nonlinearity. We treat them as ordinal variables, measured on a continuous scale. A function (the g function) connects the scale with an underlying continuous latent variable. The link function is the inverse of the CDF of the assumed underlying distribution of the latent variable. Currently the logit link, which corresponds to a standard logistic distribution, is implemented.
Package details 


Author  Maurizio Manuguerra [aut, cre], Gillian Heller [aut] 
Date of publication  20180110 04:18:12 UTC 
Maintainer  Maurizio Manuguerra <[email protected]> 
License  GPL (>= 2) 
Version  1.3.0 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.