First Time User

Welcome to the LSA website.

This website is organized into three main content areas:

Information, Applications, and Demonstrations.

The left-hand Menus frames are always available while using the site.

In the Main Menu (left top frame):

Latent Semantic Analysis
@ CU Boulder

Main Menu





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In the Sub Menu (left bottom frame):

On the front page (right startup frame / applications & demonstrations palette):


In this section, you will find basic and advanced information about the LSA theory and scientific applications.

 Information Pages

Executive Summary

1st Time User

LSA News

What is LSA?

Semantic Spaces


Group Papers

LSA Related Sites

Website Credits



These applications permit you to select an available LSA semantic space and run some comparison experiments. Each application consists of a form where you are to include the text(s) that you want to make LSA comparisons with (as well as a number of options). After you submit the form, the LSA programs will make the desired comparisons and return the results to a new web page. You can save the results using your browser's Save Frame menu.


Near Neighbors







In this section, you will find several demonstrations for applications of LSA.


Educational Text Selection

Cross Language Retrieval

Essay Scoring

Summary Scoring & Revision

We recommend that new users look through the Application and Demonstration Info links before jumping into application use. You might be familiar with LSA through reading a paper or attending a conference presentation, however, you may find some aspects of the applications and demonstrations confusing without first looking at the documentation.


Papers are available in both Postscript and PDF formats. PDF can be read online only with the Adobe Acrobat Reader. It can be downloaded from Adobe.

We appreciate any comments on how this website can be improved to better suit your needs. Please send comments to Praful Mangalath or sign our Guestbook.

Thank you, and we hope you find this site helpful and easy to use.