Behavior Data Systems, Ltd. was established in 1982 with the goal to provide the best empirically based standardized assessment instruments available.

We develop, research, standardize and market automated (computer scored) tests throughout the United States, Canada and the United Kingdom. BDS limits the use of its tests to residents of countries that are members of the Berne Convention, Universal Copyright Convention Treaty and are English speaking, such as the United Kingdom, Canada, Ireland, Australia, New Zealand, South Africa and the United States of America. These tests are designed by licensed psychologists for specific assessment purposes and are standardized on the population they are designed to assess.

Behavior Data Systems' mission is to develop and market superior tests that meet and exceed professional test standards. We are committed to provide tests that are relevant, valid, reliable, accurate and affordable.


By merging the latest psychometrics with computer technology, BDS tests objectively gather vast amounts of information, identify client problems and match problem severity with recommended treatment intensity.

There is a need for tests that can be relied upon to give evaluators information that will accurately assess their clients quickly in an easily understandable format.

Behavior Data Systems has developed a diversified menu of over 40 valid assessment instruments.


To insure Behavior Data Systems (BDS) tests are readily available, BDS signed an exclusive internet testing contract with Professional Online Testing Solutions, Inc. ( www.online-testing.com) to offer BDS tests over Online-Testing's internet platform. We are in the process of bringing all 40+ BDS tests online. Questions pertaining to Online-Testing's provision of BDS tests over the internet should be directed info@bdsltd.com.

For more information contact us: telephone (602)234-3506, fax:(602)266-8827, or e-mail bds@bdsltd.com.