Our Story

Western Psychological Services (WPS) was established in 1948 in a little pink house in Los Angeles, California, not far from the local VA hospital. Dr. Morse Manson, the company founder, developed a psychological test that would help returning World War II veterans adjust to civilian life. This was the first of many psychological and educational assessments that WPS would publish over subsequent decades. With the help of his wife Kate and son Ira, Morse embarked on a journey to help people in need by providing high quality assessment tools to colleagues in education and psychology.

Sixty five years later WPS assessments are used by helping professionals throughout the world to evaluate, diagnose, and treat people in need—especially children and teens who have developmental, social, or behavioral challenges. WPS is known worldwide for industry-leading autism assessments, innovative sensory processing measures, and outstanding customer service.

That's the first part of our story: WPS is a stable, successful, family-owned company, engaged in work that we feel good about doing.

Our Latest Chapter

The second part of our story starts with Jeff Manson, grandson of the founder (and now President and CEO of WPS), who's making a big investment in the company's future. He has given the company a wonderful new home in Torrance, California—a modern, open, inviting space that allows us to work more efficiently. And he has introduced a transformative company culture that encourages innovation, creativity, transparency, and collaboration. These changes are motivated by a belief that employees who are happy, empowered, and acknowledged can better serve the helping professionals who rely on WPS assessments.

So, here in our new headquarters, with new spirit and optimism, we continue the journey that began in 1948, in the little pink house near the VA hospital.


HTP (W-1) Published>

The House-Tree-Person (H-T-P) was the first assessment published by WPS.


WPS Hires First Employee

Due to the growing business, WPS hired it's first employee in the early 1960's: Ethel Blaisdell.

Human Behavior Magazine

From 1972 to 1979, WPS published Human Behavior Magazine, the Newsmagazine of the Social Sciences.


SIPT Published

The first edition of the Sensory Integration and Praxis Tests (SIPT) was published in 1985.

Computer Scoring Test Reports Launched

Achievement Motivation Profile (AMP) launched computer scoring in 1996. Today there are over 50 assessments with computer scoring options.

ADOS, ADI-R, & SCQ Come to WPS

WPS agreed to publish Autism Diagnostic Observation Schedule, Autism Diagnostic Interview, Revised, & Social Communication Questionnaire.

Growing Online

WPS launched a new Creative Therapy Store website – a place for intervention resources. www.creativetherapystore.com


OWLS-II Revision Released

The second edition of the Oral and Written Language Scales was released with new parallel forms and Reading Comprehension Scale.

Unlocking Potential for 65 Years!

As we celebrate our 65th anniversary we aim to develop assessments with you in mind.