Research / Executive Summary

Executive Summary

Beyond Personality: The Science of Trainable People Skills — A New Paradigm for Interpersonal Skill Assessment and Development

The Problem: A Growing Skills Gap

The modern workplace faces a paradox. As artificial intelligence automates technical tasks at an accelerating pace, the uniquely human skills of communication, emotional intelligence, and interpersonal effectiveness have become more valuable than ever—yet organizations struggle to measure, develop, and retain these capabilities.

The numbers are stark. The World Economic Forum projects that by 2025, 50% of employees will require significant reskilling, with interpersonal competencies topping the list of critical needs. LinkedIn's Workplace Learning Report found that 89% of recruiting failures stem from soft skill deficiencies rather than technical gaps. Meanwhile, the cost of poor communication alone reaches $1.2 trillion annually across U.S. businesses.

Yet the tools organizations use to address this challenge remain fundamentally unchanged since the mid-twentieth century. The Myers-Briggs Type Indicator (MBTI), developed in the 1940s, and DISC assessments, based on William Marston's 1928 behavioral theory, continue to dominate corporate training programs. These instruments share a critical limitation: they measure what people believe about themselves, not what they actually do.

The Result: A measurement gap that undermines development efforts. Organizations invest billions in soft skills training without the ability to objectively assess starting points, track progress, or demonstrate return on investment.

The Solution: AI-Native Behavioral Assessment

The People Skills Index (PSI) represents a fundamental shift in how interpersonal skills are measured and developed. Built from the ground up for the AI era, PSI combines multimodal behavioral observation with validated psychological research to assess what people demonstrate, not merely what they declare.

In approximately 20 minutes, PSI captures authentic behavioral signals through five integrated modules:

The PSI-7 Framework

PSI measures seven trainable dimensions—capabilities that can be developed through deliberate practice, measured through reassessment, and connected to observable workplace outcomes:

  1. 1
    Situational Radar: Perceiving emotional context and reading interpersonal dynamics
  2. 2
    Emotional Regulation: Managing responses and maintaining composure under pressure
  3. 3
    Outcome Ownership: Projecting competence, accountability, and agency
  4. 4
    Adaptive Agility: Flexing communication style to different audiences and contexts
  5. 5
    Strategic Clarity: Communicating clearly, concisely, and with appropriate impact
  6. 6
    Relational Warmth: Creating connection, approachability, and psychological safety
  7. 7
    Diplomatic Assertiveness: Advocating effectively while maintaining relationships

Key Differentiators

Feature PSI Traditional Tools
Data Collection Multimodal (text, voice, video recognition, self-report) Self-report only
What's Measured Demonstrated behavioral capability Declared preference or belief
Blind Spot Detection Yes (self-perception vs. performance comparison) No
Gaming Resistance High (behavioral signals difficult to fake) Low-moderate
Development Focus Explicit (trainable skills, living profiles) Limited (style awareness)
ROI Measurement Built-in (pre-post comparison) Challenging

For HR and L&D Leaders

PSI addresses the persistent challenges of soft skills development:

Implementation pathway: Pilot programs of 30-75 participants typically run 16 weeks, including assessment, individual debriefs, development activities, and reassessment. Organizations then expand based on demonstrated outcomes.

Data Practices

PSI is designed with privacy in mind:

The Research Foundation

PSI emerges from Science of People's 18 years of human behavior research, including original studies analyzing thousands of TED Talks, Shark Tank pitches, and interpersonal interactions. Founded by Vanessa Van Edwards—Harvard instructor, national bestselling author of Captivate and Cues, and behavioral scientist whose work has reached over 70 million video views—Science of People has developed frameworks adopted by Google, Meta, Microsoft, Amazon, and the United Nations.

Each PSI-7 dimension connects to established psychological research: emotional perception (Mayer & Salovey), facial expression coding (Ekman & Friesen), emotion regulation (Gross), psychological safety (Edmondson), warmth-competence dynamics (Fiske), and principled assertiveness (Fisher & Ury).

The Invitation: The workplace demand for interpersonal effectiveness will only intensify as AI reshapes which human capabilities create value. Organizations who invest in rigorous measurement, targeted development, and evidence-based coaching will build sustainable competitive advantage.