By Kent E. Frese, Ph.D. — Industrial-Organizational Psychologist and Founder, TeamLMI
Executive coaching has become one of the most widely used leadership development interventions in modern organizations. The International Coach Federation estimates that the global coaching industry generates over $4.5 billion annually, and organizations of all sizes now invest in coaching as a tool for developing leaders, managing transitions, and improving performance. But a critical question persists: does executive coaching actually work? And if so, what separates coaching that produces measurable results from coaching that amounts to expensive conversation?
The good news is that the research base on executive coaching has matured significantly over the past two decades. We now have robust meta-analytic evidence — not just case studies or anecdotal testimonials — that coaching, when done well, produces meaningful improvements in leadership performance, self-awareness, goal attainment, and well-being. The operative phrase, however, is when done well. Not all coaching is created equal, and the factors that separate effective coaching from ineffective coaching are well documented. Understanding those factors is essential for any business leader or HR professional considering an investment in coaching.
What the Research Actually Says About Coaching Effectiveness
Two landmark meta-analyses have done more than any other studies to establish executive coaching as an evidence-based intervention. Theeboom, Beersma, and van Vianen (2014) conducted a meta-analysis of 18 experimental and quasi-experimental studies and found that coaching had significant positive effects on performance and skills, well-being, coping, work attitudes, and goal-directed self-regulation. The overall effect sizes were moderate to large, placing coaching among the more effective individual-level organizational interventions available. Importantly, these effects were found across a range of outcomes — not just subjective self-report measures, but also behavioral ratings and goal attainment metrics.
Grant (2014) examined the outcomes of executive coaching in organizational settings and found that coaching was associated with enhanced goal attainment, increased resilience, and improved workplace well-being. His research also highlighted an often-overlooked benefit: coaching helps leaders develop the capacity to regulate their own thinking and behavior — what psychologists call metacognition. This is particularly important because it suggests coaching does not simply solve today's problem; it builds the cognitive architecture for leaders to solve tomorrow's problems more effectively on their own.
Additional research by Jones, Woods, and Guillaume (2016) conducted a meta-analysis of 17 studies and found that coaching had a positive effect on organizational outcomes, including both affective outcomes (such as self-efficacy and satisfaction) and skill-based outcomes (such as goal attainment and managerial effectiveness). Their analysis also revealed a critical moderating variable: coaching that used validated, multi-source feedback was significantly more effective than coaching without it. This finding has direct implications for how coaching programs should be designed.
Taken together, this body of evidence makes a clear case: executive coaching works. But it works conditionally — and the conditions matter enormously.
The Four Factors That Separate Effective Coaching from Expensive Conversation
Drawing on the research literature and over 25 years of applied consulting experience, TeamLMI has identified four factors that are consistently present when coaching produces lasting results — and consistently absent when it does not.
1. A Qualified Coach with Relevant Expertise
This may seem obvious, but the coaching industry is largely unregulated. Anyone can call themselves an executive coach, regardless of training, education, or experience. The research is clear that coach qualifications matter. De Meuse, Dai, and Lee (2009) found that coaches with advanced training in psychology, organizational behavior, or related disciplines produced more durable outcomes than those without such backgrounds. This does not mean every effective coach must hold a doctorate in psychology — but it does mean that a coach should have formal training in human behavior, adult development, and organizational systems.
Effective coaches also need business acumen. A coach who understands behavioral science but has never worked inside an organization will struggle to contextualize leadership challenges within the operational realities of a $15 million manufacturing company or a 60-person professional services firm. The best coaching sits at the intersection of scientific knowledge and practical business experience.
2. Assessment-Driven Goals, Not Vague Aspirations
Perhaps the single most important finding in the coaching research is the role of assessment data in driving effectiveness. Jones, Woods, and Guillaume (2016) found that coaching programs incorporating multi-source (360-degree) feedback produced significantly stronger outcomes than those that relied solely on the leader's self-perception or the coach's intuition. This makes intuitive sense: you cannot develop what you cannot see, and leaders are notoriously inaccurate in assessing their own strengths and weaknesses (Atwater & Yammarino, 1992).
Assessment-driven coaching begins with objective data about where a leader stands — not just in their own estimation, but in the eyes of their direct reports, peers, and supervisors. It then translates that data into specific, measurable development goals. Vague goals like "become a better communicator" or "improve leadership presence" are replaced with targeted objectives grounded in behavioral data: "Close the gap between self-rating and direct report ratings on Developing Others by implementing structured one-on-one development conversations with each team member on a biweekly cadence."
3. Organizational Support and Alignment
Coaching does not happen in a vacuum. Research consistently shows that organizational context moderates coaching outcomes (Bozer & Jones, 2018). When coaching is supported by the leader's supervisor, aligned with organizational strategy, and integrated into broader talent management processes, it produces stronger and more sustainable results. When coaching is treated as a standalone event — or worse, as a remedial intervention imposed on a struggling leader without broader support — it is far less effective.
Organizational support means several things in practice: the leader's manager understands the coaching goals and reinforces them; the organization provides opportunities for the leader to practice new behaviors; and there is a feedback loop that allows progress to be monitored and celebrated. Without these elements, even excellent coaching can be undermined by an environment that does not support change.
4. Accountability Structures and Duration
Brief, transactional coaching engagements rarely produce lasting change. Research suggests that coaching engagements of at least three to six months, with regular sessions and built-in accountability mechanisms, are necessary for behavioral change to take root (Grant, 2014). This aligns with the broader literature on habit formation and adult learning, which consistently shows that sustained practice and feedback are required to translate insight into behavior.
Accountability structures include follow-up assessments to measure progress, regular check-ins with the coach, and in many cases, periodic touchpoints with the leader's manager or HR business partner. The goal is to create a system in which development is not dependent on the leader's motivation alone but is supported by structures that maintain focus and momentum over time.
Debunking Common Coaching Myths
Despite the growing evidence base, several myths about executive coaching persist. Addressing them directly is important for organizations considering a coaching investment.
Myth: Coaching is only for struggling leaders. This is perhaps the most damaging misconception. In reality, the highest ROI from coaching often comes from developing high-potential leaders and supporting leaders through transitions — new roles, expanded scope, or succession preparation. Framing coaching as remedial discourages the very leaders who would benefit most from engaging in it.
Myth: A good coach does not need assessment data — they can just observe and advise. Observation and intuition have their place, but they are subject to the same biases that affect all human judgment. Assessment data provides an objective baseline, ensures the coaching focuses on the right issues, and enables measurement of progress. Coaching without assessment is like prescribing treatment without a diagnosis.
Myth: Coaching results cannot be measured. This is simply untrue. While measuring the dollar ROI of coaching in isolation is methodologically challenging, coaching outcomes can be measured through pre-post assessment comparisons, goal attainment scaling, changes in 360-degree feedback ratings, engagement survey results, and retention metrics. Organizations that design coaching programs with measurement built in from the beginning consistently find evidence of impact.
Myth: Any experienced business leader can coach effectively. Mentoring and coaching are related but distinct activities. Mentoring involves sharing advice based on personal experience. Coaching involves facilitating the leader's own growth through structured inquiry, behavioral feedback, and accountability. The skills required are different, and the research supports the value of trained coaches over informal mentors for sustained behavioral change (Feldman & Lankau, 2005).
TeamLMI's Assessment-Driven Coaching Model
TeamLMI's approach to executive coaching is designed to incorporate each of the four effectiveness factors identified by the research. Every coaching engagement begins with a comprehensive assessment phase using validated psychometric instruments — not as a box-checking exercise, but as the foundation upon which the entire coaching plan is built.
The AL360 is a multi-rater 360-degree feedback assessment built around six empirically derived leadership domains. It provides the leader with a detailed view of how their leadership behaviors are perceived by direct reports, peers, and supervisors — and, critically, where gaps exist between self-perception and others' perceptions. These gaps become the primary targets for coaching. The AL360 framework also connects naturally to TeamLMI's broader leadership development programs, creating alignment between individual coaching and organizational leadership strategy.
The DISC behavioral assessment provides insight into a leader's behavioral style — how they communicate, make decisions, respond to conflict, and interact with others under both normal and stress conditions. DISC data is particularly valuable in coaching because it helps leaders understand not just what they need to change, but why certain behaviors come naturally while others require deliberate effort. It also facilitates conversations about how the leader's style interacts with the styles of their team members, peers, and supervisors.
The ELLSI personality assessment adds a deeper layer by measuring enduring personality traits that influence leadership behavior. Where DISC captures behavioral tendencies — the how of a leader's behavior — ELLSI captures the underlying personality architecture — the why. Together, these assessments provide a nuanced and multidimensional picture of the leader that goes far beyond surface-level observations.
Following the assessment phase, TeamLMI works with the leader (and typically their supervisor) to translate the data into a focused development plan with three to five specific goals. Coaching sessions then follow a structured cadence — typically biweekly or monthly — over a period of six to twelve months. Progress is monitored through behavioral milestones, and in many cases, a follow-up 360-degree assessment is conducted at the six- or twelve-month mark to measure change quantitatively.
From Practice
A technology services company with approximately 100 employees had a pattern that will be familiar to many growing organizations: they promoted their best technical performers into management roles. The logic was understandable — these were smart, motivated, high-performing people. But within 18 months, several of the new managers were struggling. Two had lost key team members. One had been the subject of multiple complaints about communication style. The CEO, who had built the company from a startup, recognized the pattern but was not sure what to do about it.
TeamLMI was initially engaged to provide coaching for the three struggling managers. The first step was a comprehensive assessment for each leader using the AL360, DISC, and ELLSI instruments. The results were illuminating — and in some cases, surprising. One manager who had been characterized as "abrasive" by her team actually scored very high on conscientiousness and drive for results, but extremely low on interpersonal sensitivity on the ELLSI. Her DISC profile showed a high-D, low-S style that worked brilliantly in individual contributor roles but created friction in management contexts where listening and patience were critical. The 360 data confirmed the pattern: her supervisor rated her highly, but her direct reports rated her significantly lower on Communication and Developing Others.
With this data in hand, the coaching was targeted and specific. Instead of a generic conversation about "being a better manager," the work focused on concrete behavioral changes: implementing structured one-on-one meetings with direct reports, practicing active listening techniques calibrated to her DISC style, and developing a personal "early warning system" for the stress behaviors that her ELLSI profile predicted. Over nine months, her follow-up AL360 showed statistically significant improvement in the two lowest-rated domains. More importantly, her team's voluntary turnover rate dropped to zero during the engagement.
The other two managers had different profiles, different gaps, and different coaching plans — which is precisely the point. Assessment-driven coaching does not apply a one-size-fits-all playbook. It starts with the data and builds a plan tailored to each leader's specific development needs within their specific organizational context. The CEO later observed that the coaching investment had not only salvaged three management relationships but had also given the company a framework for developing future leaders more intentionally — a framework that has since been applied to every internal promotion into a management role.
Making the Investment Decision
For business leaders and HR professionals evaluating executive coaching, the research points to a clear set of decision criteria. First, ensure the coach has relevant qualifications — not just a certification, but genuine expertise in human behavior, leadership, and organizational dynamics. Second, insist on assessment data as the foundation of coaching goals; any coach who resists objective measurement should be viewed with skepticism. Third, build organizational support around the coaching engagement — involve the leader's supervisor, align coaching goals with business strategy, and provide opportunities for the leader to practice new behaviors. Fourth, commit to a sufficient duration and accountability structure; meaningful behavioral change does not happen in three sessions.
The evidence is clear that executive coaching, when designed and executed according to these principles, produces meaningful, measurable returns — in leadership effectiveness, in team performance, in retention, and in organizational health. The question is not whether coaching works, but whether organizations are willing to invest in doing it well.
If your organization is considering executive coaching for current or emerging leaders, TeamLMI offers assessment-driven coaching engagements grounded in I-O psychology and tailored to the realities of small and mid-sized businesses. Learn more about TeamLMI's executive coaching services or contact us to discuss how a structured coaching engagement could support your leadership development goals.