How Coaching Research Evolved | International Coach Academy

For many years, coaching developed faster as a profession than as a research field. Organizational consultants, leaders, psychologists, and educators were using coaching-style conversations with good results, and long before anyone had the data to explain why they worked. The practice was established, but the evidence came later. How coaching research evolved is a question worth understanding in order to get a full picture of where the field has come from and where it is today.

This is a common path; many professional fields begin with ‘practice wisdom’. Practitioners notice what helps, refine their methods, and borrow from related disciplines. Over time, researchers begin to ask more precise questions: What outcomes are actually changing? Which approaches are most effective? What role does the coach play? The history of coaching research is the story of this shift. It is the evolution from an emerging professional practice to a robust, evidence-informed discipline. Understanding that process is essential for any practitioner looking to become a certified coach.

Key Takeaways

• Four-Phase Evolution: Coaching research has moved from simply proving it exists (legitimacy) to understanding the deep psychological “why” behind successful outcomes.
• The Power of the Relationship: Current research highlights the coach-client relationship as the single strongest predictor of success, outweighing specific models or techniques.
• Evidence-Based Credibility: With 73% of clients now expecting formal credentials, grounding your practice in research is a business mandate and a practical way to communicate value.
• Professional Development: Research also matters because it keeps coaches current, helping them refine their thinking and improve how they work with clients over time.
• Emerging Practice Areas: Current research is expanding beyond executive coaching into areas like team coaching, health coaching, ADHD coaching, and career transition work.
• Team Coaching and AI: Two of the clearest current trends are the growth of team coaching as its own evidence-based discipline and the rapid development of AI-augmented coaching.

What is Coaching Research?

Coaching research is the systematic study of coaching processes and outcomes using established research methods. Unlike personal anecdotes or testimonials, which can often be driven by opinion alone, research relies on structured ways of collecting and analyzing data. And it occurs within an academic framework that enables findings to be examined, compared, and built upon.

Coaching research takes many forms. Some studies compare coaching to no intervention or alternative forms of support. Others follow clients over time to understand how change unfolds. Then there is research that combines findings from multiple studies to identify overall patterns or qualitative investigations exploring coaching experiences in depth.

Across these approaches, research asks questions such as:

• Does coaching produce meaningful benefits?
• Under what conditions is coaching most effective?
• What factors influence coaching outcomes?
• How do clients experience the coaching process?
• What mechanisms appear to support change?

The methods and approaches to Coaching Research are many and varied – from proving coaching works to understanding how it works, for whom, under what conditions, and why. It’s about identifying best practices, recognizing potential pitfalls, and continuously improving the quality of coaching services. For individual coaches, engaging with research means providing more effective services grounded in evidence rather than hunches.

The Four Phases of Research Evolution

Coaching evolved from a blend of sports psychology, management consulting, and humanistic psychology. Long before coaching research became established, many consultants, trainers, leaders, and helping professionals were already using what we would now recognize as a coach approach in their day-to-day work. The research followed a similar, structured path of maturation.

Phase 1: Establishing Legitimacy (The 1990s to Early 2000s)

In the 1990s, the field shifted as active professional practice began to be described, studied, and organized into a formal body of knowledge. Many practitioners were already using coaching skills effectively in workplaces, leadership development, and personal growth settings. Early research was largely descriptive. It documented who was coaching, what they were doing, and how clients experienced the process. It relied heavily on self-reported satisfaction, basically, clients saying, “I liked it, and I feel better.”

Although methodologically limited by contemporary standards, this work played an important role. It demonstrated consistent client satisfaction and positioned coaching as a legitimate subject for systematic study.

Phase 2: Building the Evidence Base (The 2000s to 2010s)

As the field matured, research designs became more robust. Studies increasingly included comparison groups, longer follow-up periods, and validated measurement tools drawn from psychology and organizational research.

During this period, researchers examined coaching’s impact on leadership development, goal attainment, well-being, performance, and organizational outcomes. Vikki Brock’s doctoral research and subsequent Sourcebook of Coaching History provided the field’s first comprehensive historical account, tracing coaching’s emergence from multiple disciplines and documenting its evolution as a distinct profession. Meta-analyses began to appear, allowing researchers to assess overall effectiveness across multiple studies and contexts.

One of these early, and significant, coaching researchers, Anthony Grant, conducted numerous studies establishing coaching’s effectiveness for enhancing goal attainment, increasing resilience, and reducing stress. His work helped establish evidence-based coaching as a distinct approach grounded in psychological science.

Phase 3: Understanding the “How” and “Why” (2010s to Present)

Recent research has shifted from simply asking “Doescoaching work?” to investigating how and why it works. Studies examine the coaching relationship, the role of specific techniques, individual differences that affect coaching outcomes, and the interaction between coach and client characteristics.

Findings increasingly suggest that the quality of the coaching relationship is a stronger predictor of outcomes than any specific model or technique. Research has also clarified the importance of goal clarity and client engagement in supporting change.

The bond of trust, the shared agreement on goals, and the “presence” of the coach are the real drivers of change. At International Coach Academy (ICA), our Faculty emphasizes this approach, moving the focus from just solving a problem (the “what”) to coaching the human being (the “who”).

Phase 4: The Future of Specialization and Digital Intelligence

The current phase is characterized by two converging developments. The first is deepening specialization. Research is examining how coaching works for specific populations, including neurodivergent leaders, remote and hybrid teams, and those navigating major career transitions, alongside growing integration with adjacent disciplines such as neuroscience, positive psychology, and behavioral economics. 

The second is a fundamental shift in how coaching is delivered and what counts as a coaching interaction at all.

Digital delivery has moved from an outlier to an established practice, with research confirming that outcomes in well delivered digital coaching are broadly comparable to face-to-face work. More significantly, the emergence of AI coaching agents has introduced questions the profession is only beginning to grapple with: what AI can and cannot do, where human coaches remain essential, and how the profession should be governed as the boundaries of coaching itself begin to shift.

Navigating the Research Landscape: Where to Look

If you want to stay at the cutting edge of the industry, you need to know where the high-quality information lives. These resources are valuable collections of the latest thinking and research into coaching.

1. The ICF Research Portal: The International Coach Federation (ICF) is the gold standard for a reason. Their portal includes the Global Coaching Study, which is the most comprehensive survey of industry trends, specializations, and business models worldwide.
2. The Institute of Coaching (IOC): Affiliated with McLean Hospital and Harvard Medical School, the IOC brings serious academic rigor to the field. They host conferences and publish research summaries that bridge the gap between science and practice.
3. The Library of Professional Coaching: A fantastic, community-supported resource that offers vetted, peer-reviewed content and dissertations. It’s one of the best places to find deep dives into specific coaching models.
4. Peer-Reviewed Journals: Look for the International Journal of Evidence Based Coaching and Mentoring or Coaching: An International Journal of Theory, Research and Practice.

Current Research Trends

Expanding the Scope

Historically, coaching was all about the executive suite, and although it is still significant today –  the 2025 ICF Global Coaching Study found that 54% of coaches specialize here, contributing to a $5.34 billion USD industry – the focus is broadening.

Researchers are now paying much more attention to coaching in health settings, ADHD support, career transition, workplace resilience, and other specialized contexts. This shift reflects how coaching is actually being used. This broader scope is especially relevant for students of coaching who are looking for icf accredited coach training that prepares them to work with a wide range of people and goals. International Coach Academy (ICA) is a particularly strong choice here because we teach coaching as a core methodology, not as a method of change within a narrow niche area. This allows each student to identify their own target market and niche, rather than being taught a style of coaching that only works in one narrowly defined area.

Measurable Outcomes and ROI

In the early years of coaching the question of ROI mainly focused on whether it was worth the investment. This has now shifted to a focus on how to measure it. The ICF/PwC Global Coaching Client Study found that 86% of organisations tracking coaching ROI reported a positive return, with a median of five to seven times the investment. A separate global survey by PricewaterhouseCoopers and the Association Resource Centre put the average at seven times the cost of coaching.

The methodology behind these findings is also maturing. De Haan and Nilsson’s 2023 meta-analysis, published in the Academy of Management Learning & Education, analysed 39 randomized controlled trial samples covering 2,528 participants and found a statistically significant moderate effect size for coaching across leadership and personal outcomes. A companion 2023 meta-analysis in Frontiers in Psychology focused specifically on executive coaching, finding particularly strong effects on behavioral change. They apply the same methodological standards used in clinical psychology and medicine – randomized controlled trials, validated outcome measures, and rigorous inclusion criteria.

What has shifted then is the pressure to demonstrate value systematically rather than anecdotally. Research is increasingly focused on evaluation methodology, looking at how to link coaching engagements to measurable organisational outcomes. For coaches entering organisational contexts, this is the conversation they need to be equipped to have.

Wellbeing Is Now a Core Coaching Domain

Coaching’s traditional home has been performance and leadership development, but that has been slowly changing. The ICF’s 2024 Snapshot Survey on Coaching and Mental Well-Being found that 85% of coaches working with clients on well-being issues are hearing growing demand for support, with 78% of clients citing career related challenges as their primary reason for seeking coaching. Meanwhile, 64% of coaches employed within organisations reported that their employers are investing more in employee well-being than five years ago.

Research is examining coaching’s role in building resilience, preventing burnout, and supporting mental health within coaching’s appropriate scope.

Identity, Culture, and Power

For most of its history, coaching research has treated the coaching relationship as relatively neutral ground. That assumption is being questioned. Passmore, Liu, Tee and Tewald’s 2023 study in the International Coaching Psychology Review explored race, inclusion, and belonging across the global coaching community, finding that the profession still has significant work to do in reflecting the diversity of the clients it serves.

A 2024 research collection published in Frontiers in Psychology, edited by Bourne, April and Dharani, examined how intersectional social differences – race, gender, class – affect the coaching relationship, and how conventional coaching models can inadvertently reinforce Western cultural assumptions about leadership and individual agency. For coaches working across cultures and contexts, this research is directly relevant to practice. It is clear that effective coaching requires more than generic relational skill. It also requires awareness of context, power, identity, and lived experience.

The Screen Is No Longer Second Best

For years coaches and clients alike were skeptical about online coaching. There was a perspective that digital coaching was a compromise, a convenience that traded something essential for accessibility. Then COVID-19 arrived and removed the choice entirely. In 2019, approximately 40% of coaches offered virtual options. By 2023, that figure had risen to 72%. Coaches with decades of face-to-face practice found themselves on Zoom overnight, and the profession discovered something unexpected – online coaching worked.

Michalik and Schermuly’s 2023 research found that coaching outcomes in digital environments are broadly comparable to face-to-face work – but also that digital coaching produces more side effects, including increased cognitive load and disruptions to nonverbal communication. So the evidence supports digital coaching as an effective modality, while pointing to real challenges that coaches working online need to actively manage.

What has changed most dramatically is the structure of the industry around digital delivery. Researchers Jonathan Passmore and Matt Woodward have described this period as a shift from the professionalization of coaching toward its productization. Large-scale platforms like EZRA are now delivering coaching as a scalable, algorithm-mediated service to tens of thousands of clients in enterprise organisations, reshaping who has access to coaching and what the profession looks like commercially. An entry-level manager in Mumbai and a teacher in rural Montana can now access professional coaching support.

The Emergence of AI in Coaching

The arrival of generative AI has moved faster than the profession expected. A 2025 systematic literature review by Passmore, Olafsson, and Tee, examining 16 studies covering over 2,300 participants, found that AI coaches can be effective, accepted, and useful, matching human coaches in competence for specific tasks. Earlier research by the same team found an AI coaching agent demonstrating competence at ICF Associate Credentialed Coach level across all eight core competencies.

The ICF also published its AI Coaching Framework and Standards in 2024, and the EU AI Act in the same year, and it is already shaping how coaching technology providers approach data governance and transparency. The research also makes clear where AI falls short: formulaic empathy, an inability to sit with silence, no lived experience to draw on, and limited capacity to navigate the complex relational dynamics that characterise sophisticated coaching work.

So it seems the question is no longer whether AI can coach. It is what that means for the profession. Under what conditions does it serve clients well, and what does it mean for the human coaches who do the work that AI cannot.

Team Coaching Is Finding Its Evidence Base

For most of coaching’s history, the research (and practice) base has focused on one-to-one practice. Team coaching, where the team itself is the client rather than the individuals within it, has existed in various forms for decades, but rigorous empirical study of it is quite recent. Team Coaching is now being treated as a distinct discipline rather than a simple extension of one-to-one coaching. That has implications for training, supervision, and competence. The skills required to coach a team system are different from the skills required to coach an individual. The coach has to work with group dynamics, shared purpose, collective accountability, and the wider organizational context at the same time.

Recent work by Passmore and colleagues (2025) reflects this shift, describing team coaching as an area with its own frameworks, competencies, and growing experimental evidence base, including randomized controlled trial research. The Institute of Coaching team effectiveness review also helps show how the evidence base for team coaching is developing. In practical terms, this means team coaching is no longer sitting at the edge of the profession. It is becoming one of the main areas of formal development and research attention.

Ethics as a Professional Priority

Ethics has become increasingly important as the coaching field develops and diversifies. Things like rapid AI adoption, cross-cultural practices, new technologies, team systems, and increasingly complex client contexts require a refined and sophisticated approach to ethics. Professional judgment, self-awareness, and ongoing professional reflection are more important than they ever were before.

Research is now beginning to examine what ethical coaching looks like when clients bring systemic issues, power dynamics, or social inequities into the coaching space. The ICF revised its Code of Ethics in 2024, which reflects this shift. It also reinforces the expectation that coaches engage in continuous ethics education rather than treating ethics as something covered once in initial training.

Why the Science Matters for Your Practice

You might wonder why a coach working with a startup founder or a life coach helping someone through a career transition should need or even care about things like peer-reviewed journals. There are three clear reasons:

1. Credibility
2. ROI
3. Professional Development.

According to global research, 73% of coaching clients now expect their coach to be certified or credentialed. They are also expecting them to have specialist knowledge about coaching. They are looking for a professional who uses icf accredited coaching programs and can explain their methodology with clarity.

Organizational sponsors are also demanding data. When a company like Intel reports billions in benefits from coaching, or when studies show an average ROI of seven times the initial investment, those outcomes are tied to programs grounded in evidence-based principles. If you can’t speak to the reasoning behind your methodology, you risk sounding vague in a market that increasingly expects clarity and professionalism.

Research also supports continuous professional development. Staying up to date with current ideas, emerging evidence, and shifts in coaching practice helps you refine your own approach over time. That matters whether you plan to become a certified coach, deepen an existing practice, or strengthen your position through icf accredited coach training. Good coaches do not rely only on what they learned once. They keep updating how they think, listen, and work.

The ICA Approach: Evidence-Based Education

At International Coach Academy, we teach you the art of coaching alongside the science behind the skill. Our coaching training is built on these research foundations. We integrate the latest findings on human behavior, neurobiology, and organizational systems into our curriculum.

In our ICF accredited coach training, students learn to apply evidence-based principles to real-world scenarios while mastering the essential competencies. Our Faculty members are practitioners who stay engaged with current research, ensuring that what you learn on Tuesday can be applied in a coaching session on Wednesday.

Contributing to the Field: The ICA Research Requirement

At International Coach Academy (ICA), every student conducts their own research as part of their learning. This work can be submitted in the format that best suits the topic and the student’s strengths, including a research paper, an article, an interview, or a case study.

This requirement serves three important purposes. First, it helps students build knowledge by exploring a specific area of coaching in greater depth. That process strengthens their understanding and sharpens their thinking in a focused area of practice.

Second, it contributes to the field itself. Each student project adds to the growing body of coaching evidence and professional reflection. Coaching continues to mature as a discipline when practitioners actively document what they are seeing, testing, and learning.

Third, it establishes credibility. When students publish this work, they create a professional asset that demonstrates serious engagement with the field. It also helps communicate their unique identity, perspective, and approach to potential clients in a clear and credible way.

Staying Curious and Grounded

The shift from established practice to documented evidence is a sign of a healthy, maturing profession. It gives coaches a shared language and a benchmark for excellence. Staying current with research is one of the clearest markers of a serious coaching practice. And this applies whether you are just starting out or deepening an established practice. The history of coaching research is still being written, and the coaches who engage with it seriously are the ones shaping what comes next.