Strengths Development Inventory SDI Overview
The document provides an executive overview of the Strengths Development Inventory (SDI), originally created by Elias H. Porter in 1971 and now known as the Strength Deployment Inventory. It outlines the instrument’s theoretical foundation in Relationship Awareness Theory, which distinguishes between behaviour and underlying motivation. The overview describes the three core motivational systems (Blue – people‑focused, Red – achievement‑focused, Green – analysis‑focused) and the seven blended Motivational Value Systems that combine these colors. A key feature highlighted is the Conflict Sequence, which maps how an individual’s motivation shifts as conflict escalates, offering a practical framework for conflict management and coaching. The inventory also identifies workplace strengths and “overdone strengths,” showing how positive traits can become liabilities when over‑applied. Applications span executive coaching, leadership development, team effectiveness, communication, culture building, and conflict resolution. Psychometric details note that SDI 2.0 delivers reports on Motivational Value System, Conflict Sequence, Strengths Portrait, and Overdone Strengths Portrait, with an evidence base that is respectable but heavily reliant on developer‑authored research and limited independent validation. The document lists the model’s strengths (clear motivation model, practical conflict framework, relationship‑centred) and limitations (modest independent evidence, simplified three‑motive structure, risk of labeling, self‑report biases). A brief comparison with the Emotional Capital Report (ECR) shows complementary focus—SDI on motivation, ECR on emotional competencies. The overall assessment concludes that despite psychometric constraints, SDI remains a thoughtful, relationship‑development tool, especially valuable for understanding motivational change during conflict.
Topics
Origins and Evolution of SDI: From Porter’s 1971 Instrument to Digital SDI 2.0
Chronicles the creation of the Strengths Development Inventory by Elias H. Porter, its grounding in Relationship Awareness Theory, and its later digital upgrade.
Relationship Awareness Theory: Motivation vs. Behaviour
Explains Porter’s core premise that identical behaviours can stem from different underlying motives, forming the conceptual backbone of SDI.
Three Core Motivational Systems (Blue, Red, Green)
Details the primary motivational colors—Blue (people‑oriented), Red (achievement‑oriented), Green (analysis‑oriented) and how most individuals are blends of these.
Seven Motivational Value Systems: Blended Color Profiles
Lists the seven value‑system blends (Blue, Red, Green, Blue‑Red, Red‑Green, Green‑Blue, Hub) that capture nuanced motivational constellations.
Conflict Sequence: Predictable Motivational Shifts Under Stress
Describes the hallmark SDI feature that maps how each motivational pattern changes as conflict escalates, providing a tool for conflict management and coaching.
Strengths and Overdone Strengths: When Assets Become Liabilities
Introduces the concept that each identified strength can become a liability if over‑applied (e.g., confidence → arrogance).
Practical Applications: Coaching, Leadership, Teams, and Conflict Resolution
Outlines the primary contexts where SDI is deployed—executive coaching, leadership development, team effectiveness, communication, culture, and conflict resolution.
Psychometric Profile: Reports, Evidence Base, and Validation Limits
Summarises the SDI 2.0 reporting components (Motivational Value System, Conflict Sequence, Strengths Portrait, Overdone Strengths Portrait) and notes the reliance on developer‑authored research with limited independent validation.