Latent Class Version History
Sawtooth Software Homepage

 

What is Latent Class?
Latent Class is a system for estimating part worths for Choice-Based Conjoint (CBC) questionnaires.
You may e-mail support@sawtoothsoftware.com if you have questions relating to information on this web page.
We strongly suggest using the latest version of Latent Class.

 

Latent Class 4.0.8 (11 Nov 2008)
  1. Bug: Using two linear attributes in an interaction caused the none option to appear as 0.0 for all respondents.

 

Latent Class 4.0.6 (25 Sep 2008)
  1. Bug: Setting attribute codings to 'Excluded' produced incorrect labels and utilities. This bug was introduced in v 4.0.4.

 

Latent Class 4.0.4 (15 July 2008)
  1. Bug: Using constraints on an interaction when more than one interaction was present could result in incorrect utilities or a memory error message.
  2. Bug: Saving CSV files in some countries would use a comma instead of the locale-specific delimeter. The preferences dialog now includes an option to select the output format.
  3. Bug: A new line after a linear variable was missing, causing the report to look as if there was an attribute missing and the linear was a level of the next attribute.

 

Latent Class 4.0.2 (4 Sep 2007)
  1. Bug: Missing responses when using dual-response none were coded incorrectly. The resulting build file would not run. It did not cause incorrect utilities.
  2. Bug: Batch Estimation did not save the log report.

 

Latent Class 4.0.0 (17 Jul 2007)
  1. Feature: New Windows Interface, eliminating all text-only control files.
  2. Feature: Support for chip allocation data (constant sum).
  3. Feature: Support for "Dual-Response None" data.
  4. Feature: New files studyname.csv and studyname_prob.csv may be opened with Excel. Studyname.csv contains the part-worth utilities for each group and studyname_prob.csv contains the probabilities of group membership for each respondent.
  5. Feature: Batch mode processing of multiple projects.
  6. Feature: Ability to add notations for the project.
  7. Feature: Without a license, Latent Class functions in demonstration mode.
  8. Bug: When displaying standard errors, the errors for the last group are displayed for each group.