SEI Research

The SEI has been normed and validated internationally; over 100,000 people are in the SEI norm base, and multiple studies have shown the SEI to be an effective measure tied to important work and life outcomes.  Here is a selection:

sei-eq-test-technical-manualSEI Technical Briefing

Overview of the SEI, SEI-YV, and SEI360 tools and their psychometric properties [PDF]


SEI Technical Manual

The SEI Technical Manual is free online in our Knowledge Base with extensive data about the SEI, its psychometric properties and validation. 


state-of-the-heart-2014State of the Heart

What is the status of emotional intelligence in the world today? For the first time ever, a view of world-wide data on key strengths and weaknesses, opportunities and threats for EQ globally. Drawing on a database of over 100,000 assessments, a global sample was created to generate a balanced basis of comparison of EQ in 2011-2013 and in 2014-15, in the 3 regions of the world: APAC, AMER, EMEA. Download the report from


Additional White Papers and Research Articles using Six Seconds’ assessments

Note: See the Case Study archive for the most up-to-date collection.

White Paper: EQ and Success. Emotional intelligence predicts 55% of critical success factors – and certain EQ skills are key to specific aspects of success: Effectiveness, Relationships, Quality of Life, Wellbeing [White Paper]

The Amadori Case: Supplying McDonalds – Organizational Engagement, 
Emotional Intelligence and Performance.  In a 3-year study of multiple plants, strong links are demonstrated between leaders’ emotional intelligence, managerial performance, and employee engagement. [Online]

White Paper: Emotional Intelligence for Athletes’ Life Success. Among 30 retired members of the National Football League, there is a very strong correlation between EQ and “life success” (health, behavior). [PDF, slide highlights, press release]

White Paper: EQ, Stress, and Performance in Healthcare: SEI predicts 60-80% of the variation in performance scores (higher for more senior team members). EQ seems to mitigate the negative effects of stress. [White paper] [PDF, slides, and press release also available]

Research Analysis: Women’s Leadership Edge: Global Research on Emotional Intelligence, Gender, and Job Level.  Reviewing data from 24,000 workers and leaders from around the world shows that women have an untapped leadership edge — but not in all areas of EQ.  [Article Online

White Paper:  Leadership Success and Emotional Intelligence in the Middle East [White Paper] [PDF] [slide highlights]

White Paper: Optimism for Performance: Optimism on SEI predicts 17.9% of performance scores in high-tech company [PDF]

White Paper: Increasing EQ: 2-day training yields 7% gain in scores [PDF] [Press Release]

White Paper: EQ and Age: Age is slightly predictive of some aspects of emotional intelligence [PDF] [Article from SHRM] [Press Release] [Blog post]

Journal Article: Differentiating emotional intelligence in leadership: Study of 3,305 employees shows that executives have higher levels of EQ (ie, emotional intelligence is predictive of job success) and that different levels of employees have different development needs. [Authors’ Prepublished Version – PDF] [Official Abstract]

In addition, please see:

Research and Practice Library for a reference list and additional links.

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