Ordinal data
Download
1 / 8

Ordinal Data - PowerPoint PPT Presentation


  • 102 Views
  • Uploaded on

Ordinal Data. Sarah Medland. What about more than 2 categories?. Very similar We create a matrix containing the 1 st threshold and the displacements between subsequent matrices We then add the 1 st threshold and the displacement to obtain the subsequent thresholds. 2.2. -1. 1.2. 3.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Ordinal Data' - arlais


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Ordinal data

Ordinal Data

Sarah Medland


What about more than 2 categories
What about more than 2 categories?

  • Very similar

    • We create a matrix containing the 1st threshold and the displacements between subsequent matrices

    • We then add the 1st threshold and the displacement to obtain the subsequent thresholds


Mx threshold specification 3 cat

2.2

-1

1.2

3

-3

0

Mx Threshold Specification: 3+ Cat.

Threshold matrix: T Full 2 2 Free

Twin 1 Twin 2

1st threshold

increment


Mx threshold specification 3 cat1

2.2

-1

1.2

3

-3

0

Mx Threshold Specification: 3+ Cat.

Threshold matrix: T Full 2 2 Free

Twin 1 Twin 2

1st threshold

increment

MxAlgebraL%*%T


Mx threshold specification 3 cat2

2.2

-1

1.2

3

-3

0

Mx Threshold Specification: 3+ Cat.

Threshold matrix: T Full 2 2 Free

Twin 1 Twin 2

1st threshold

increment

MxAlgebraL%*%T

2nd threshold


Check the xls spreadsheet
Check the xlsspreadsheet…


Two approaches to the liability threshold model
Two approaches to the liability threshold model

  • Solution?

  • Traditional

    • Maps data to a standard normal distribution

    • Total variance constrained to be 1

  • Alternate

    • Fixes an alternate parameter

      • Binary or Ordinal data fix E

      • Ordinal data fix 1st two thresholds (aka invariant threshold approach)

    • Estimate the remaining parameters