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We envision a world where people have the power to make every relationship in their lives more positive and productive by learning when and how to use their core strengths.

Relationships can be complex, but the good news is that making your talent more effective doesn’t have to be. Core Strengths is the only solution that helps you improve relationships, build better teams and coach for performance throughout your organization. Our assessments, training and platform enable you to actively shape the conversations that move businesses forward.

Since 1971 over three million people have taken the SDI assessment and have learned how to flexibly approach relationships for greater mutual success. Today it’s easier than ever to reinforce the Relationship Intelligence they’ve gained through our talent effectiveness platform, a revolution in talent development that helps people reach their highest potential through relationships.


Meet the experts behind Core Strengths

Core Strengths offers dynamic, compelling speakers skilled at weaving the themes of Leadership, Accountability and Strengths-based Teamwork into any Core Strengths event. They bring the latest research delivered with experience and knowledge to their speaking engagements, and each has worked with a diverse array of companies and audiences.

Tim Scudder Picture


Principal | Author

Mike Patterson Picture


Principal | Author


In 1971, Elias Porter introduced the SDI and Relationship Awareness Theory to the world. His theory focuses on personal strengths and their underlying motivations as the key to understanding people and improving relationships. The SDI is the practical application of the theory and was the first personality assessment to use colors. The SDI has been used on every continent and is available in over 25 languages.

The theory behind the SDI first began to take shape in the 1950s when Elias Porter was part of the team that introduced client-centered therapy and the human potential movement. Porter worked closely with Carl Rogers at the University of Chicago, where he began working with personality assessments and was a contributor to Rogers’ client-centered concepts Porter’s earliest assessments were based on Erich Fromm’s descriptions of non-productive personalities, which were an advancement of Sigmund Freud’s counseling concepts.

Core Strengths in the News

Self-Debrief Videos for Core Strengths SDI 2.0

Core Strengths® Launches Personalized Results Videos

Core Strengths® releases new groundbreaking SDI 2.0 Personalized Results Videos, and it's allowing learners to receive their SDI results via self-paced, personalized videos.

ATD 2019 Best in Show

The Core Strengths® Booth won “Best in Show” at atd 2019 in Washington D.C.