Evidence-Based Coaching

We didn't build Walnut
on intuition.
We built it on evidence.

Every decision — the personality frameworks, the games, the skill tree architecture — is grounded in peer-reviewed research. This is where we show our work.

The Walnut Method — how the science connects

Each piece of Walnut is built on a specific research foundation. Together, they form a system no single-piece platform can replicate.

1
Deep Assessment
OCEAN + DISC + Enneagram — three layers of personality science
2
Precision Matching
Algorithm pairs client to coach on trait, behaviour and motivation fit
3
Skill Tree
21 skills, 5 categories, mastery-sequenced — not time-based
4
Games
Experiential learning — skills practised before they are needed for real
5
Measured Growth
Progress visible to coach, client, and HR — not just felt
Research Relevant to Everyone
Foundation Research
The core science that underpins how Walnut matches you to a coach and structures your growth \u2014 relevant whether you are an individual, an HR leader, or a CEO.

Why We Use OCEAN + DISC + Enneagram Together

The research case for combining three personality frameworks — and why this three-layer approach to coach matchmaking outperforms any single-framework assessment on the market.

IndividualsHR & L&DCEOs

Why We Use a Skill Tree

Six research pillars — from Bloom’s Mastery Learning to Bandura’s Self-Efficacy — behind Walnut’s 21-skill, 5-category growth architecture and why it outperforms traditional development programmes.

IndividualsHR & L&DCEOs
For Individual Professionals
Research for Individuals Considering Coaching
Whether you are new to coaching or evaluating Walnut as your next step, this research answers the most common questions \u2014 from what coaching actually is, to why our coaches are credentialled differently.

Coaching vs. Therapy vs. Mentoring vs. Consulting

A clear, research-backed guide to what coaching actually is, who it is for, and how to know whether you are the right candidate — so you arrive in your first session with clarity, not confusion.

Individuals

Why ICF Accreditation Matters

What the three ICF credential tiers mean, what the training hours require, and why an unaccredited coach is an active risk — not just a downgrade — in a professional coaching context.

IndividualsHR & L&D
For HR & L&D Teams
Research for HR and Learning Leaders
The evidence you need to evaluate Walnut as a platform, build the internal business case, and demonstrate measurable outcomes to your leadership team after a programme completes.

Why We Teach Leadership Through Games

The experiential learning science behind every game in Walnut’s corporate programmes — and why simulation produces 2 to 7 times higher skill transfer than classroom instruction alone.

HR & L&DCEOs

What Progress Actually Looks Like

How Walnut measures skill delta, what the mid-programme direct report survey surfaces, what a graduation growth report contains, and how HR can demonstrate coaching ROI to the board.

HR & L&DCEOs
For CEOs & Business Leaders
Research for Business Leaders Investing in Coaching
The financial and strategic case for coaching at scale \u2014 including what peer-reviewed research says about ROI, what poor leadership actually costs an organisation, and how to evaluate coaching as a business decision.

The ROI of Coaching — The Business Case

ICF and HCI research showing an average coaching ROI of 788 percent. How to translate coaching investment into board-level language and build the case that gets a CFO to approve a programme.

HR & L&DCEOs
Key Citations

The papers that
built this platform

Every core feature of Walnut traces back to a specific body of research. These are the most critical citations across the full library.

Personality Matching
Horvath & Symonds (1991) — Coaching alliance accounts for 30% of all outcome variance. Journal of Applied Psychology.
Skill Tree Architecture
Bloom (1968) — Mastery learning produces dramatically better outcomes than time-based progression. Educational Psychology.
Games & Simulation
Salas et al. (2009) — Simulation-based training produces 2–7x higher skill transfer vs classroom. Journal of Applied Psychology.
Skill Sequencing
Ericsson et al. (1993) — Expertise requires targeted, specific, feedback-rich practice — not generic experience. Psychological Review.
Gamification
Hamari et al. (2014) — Gamification significantly increases motivation, engagement, and behavioural outcomes. HICSS.
Progress & Goals
Locke & Latham (1990) — Specific goals with visible progress indicators produce 62% higher attainment. Psychological Science.
Coach Matching
Grant & Cavanagh (2007) — Personality-informed coaching formulation leads to meaningfully better outcomes. Coaching: An International Journal.
Coaching ROI
ICF / HCI Study (2019) — Organisations that invest in coaching report an average ROI of 788%. International Coaching Federation.

Ready to experience the
science in action?

See how OCEAN, DISC, and Enneagram, your skill tree, and your personalised game programme come together in a single 30-minute demo.

Book a Demo