Sensory Computer Systems Forums Index Sensory Computer Systems Forums
Welcome to the Sensory Computer Systems Online Forums!
 
 FAQFAQ   SearchSearch   RegisterRegister 
 ProfileProfile   Log inLog in   
   Sensory Computer Systems Home   

Latin Square Designs

 
Post new topic   Reply to topic    Sensory Computer Systems Forums Index -> Test Design
View previous topic :: View next topic  
Author Message
ForumAdmin
Site Admin


Joined: May 20 2005
Posts: 120
Location: New Jersey

PostPosted: Thu Jun 03, 2010 5:06 pm    Post subject: Latin Square Designs Reply with quote


Latin Square Designs Randomization

SIMS 2000 utilizes latin square randomization techniques for many randomization needs in SIMS 2000.
Optional experimental design sample randomizations and/or your custom experimental plans.
See your SIMS 2000 Test Definition rotation plan report for final verification of your test's sample presentations.

In SIMS 2000 you can pre-select any of the preset Latin Square Williams Designs for 2 to 26 treatments
into your SIMS 2000 Experimental Plans under the Blocks tab.

Reference excel spreadsheet with preset Latin Square Williams Designs for 2 to 26 treatments. Latin-Square-Williams-Designs.xls

Latin Square definition:
A Latin square is an n × n table filled with n different treatments in such a way that each treatment occurs exactly once in each row and exactly once in each column. Here is an example:
       1 2 3   /   2 3 1    /   3 1 2 
Latin Squares places each product in each position an equal number of times.
Latin Squares are not fully balanced randomized designs, and generally intended when n is not large.
Latin Squares are for complete blocks only.

Tom Carr, June 2010, Latin Square Williams Designs.
- Good cross-over design, balanced with respect to first-order carry-over effects
- Every treatment follows every other treatment the same number of times
- Williams Designs require fewer subjects than those based on complete sets of Latin squares

References: Sensory Evaluation Techniques, Civille, pg 264 (2nd Ed), pg 295 (3rd Ed), pg 346 (4th Ed).
References: Wikipedia websites: http://en.wikipedia.org/wiki/Latin_square
References: Latin Square Williams Designs: http://statpages.org/latinsq.html

Sensory Computer Systems

Back to top
View user's profile
Display posts from previous:   
Post new topic   Reply to topic    Sensory Computer Systems Forums Index -> Test Design All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group