IDI RESEARCH LIBRARY

The Science Behind Interpersonal Dynamics

A multidisciplinary framework grounded in behavioural, cognitive, social, developmental, and biological psychology. Over 40 years of research, independently validated and certified by DNV.

Years of Research

Profiles Generated

Forms Completed

01MAPPING

Creating reliable images of social interaction. We map how people behave, not how they are characterised.

~15 min

02DESCRIPTION

Moving from data to meaningful insights. The strongest insights emerge from perception gaps.

~15 min

03DEVELOPMENT

From insight to lasting behaviour change. Understanding a pattern and changing it are fundamentally different challenges.

~15 min

Knowledge

Articles on self-awareness, behavior and collaboration at work, grounded in research.

29 October 2026IDI is certified by DNV. Here is what the EFPA test review model examines, and what it means for you.1 October 2026Who sees most clearly how you come across at work?8 September 2026The most capable people in the company often make up its worst functioning group. The research knows why.All articles →

29 October 2026

IDI is certified by DNV. Here is what the EFPA test review model examines, and what it means for you.

An independent certification body has reviewed IDI against the European psychologists’ federation’s model for test quality, version 5.0. IDI is the first and only certified tool in its category. How the review works, what it examines, and what the certification means for you as an IDI user.

1 October 2026

Who sees most clearly how you come across at work?

You know what you mean. Others see what you do. Research shows that it is less obvious than we think which of you has the most accurate picture.

8 September 2026

The most capable people in the company often make up its worst functioning group. The research knows why.

Only a minority of leadership teams function well, the research shows. The problem is rarely competence, it is the interaction. Here is what the best ones do differently.

The framework

One behavior, five fields of psychology

IDI starts from how people actually behave at work. The mapping, the IDI Profile, captures the intersection where three perspectives meet: you as an individual (I), your collaboration with others (We) and the work task you share (It). Like light through a prism, that behavior is then split into the five fields of psychology IDI draws on.

“I”The personal
“We”The interpersonal
“It”The impersonal

Social psychology, how others affect us
Behavioral psychology, how our surroundings shape our patterns
Cognitive psychology, how we interpret and decide
Developmental psychology, how abilities grow through life
Biological psychology, the brain’s basis for collaboration

Our commitment

A tool for development, never for sorting.

Always voluntaryNo one can be required to complete the assessment.
Only for youResults are visible only to the participant.
Never for selectionNever used for recruitment, promotion or termination decisions.
Certified facilitatorsProfessionally trained and certified to uphold this.

Certification

Certified by DNV according to the EFPA test review model

IDI is certified by DNV, an independent certification body, according to the test review model of the European Federation of Psychologists' Associations (EFPA). The model is used to review tests used in working life.

The review covers the theoretical basis of the test, its documentation, norms, reliability and validity, and how results are interpreted and fed back. The certification means an independent party has found that IDI meets the requirements in each of these areas.

Most certified tests are personality or ability tests. IDI is registered under the test type Other, with the description "Perceived interpersonal behaviour / social-interaction style in a defined work role", and is the first and so far only tool certified in that category.

What the EFPA test review model examines, and what the certification means →

DNV certification mark for occupational test tools

IDI is certified by DNV according to the EFPA test review model.

About the certification →