Does Experience Improve Performance? Why Learning Systems Matter More Than Tenure
When employers use years of experience as shorthand for capability, they make a consequential bet: that time on the job has produced better judgment. Sometimes it has; sometimes it has produced ten years of the same habits, repeated. Years on a résumé cannot tell the difference.
That distinction matters most in professional services, where quality is hard to observe, feedback arrives late, and seniority can make a person's judgment less likely to be challenged. The useful management question is not "How long has this person done the work?" It is "What system converts that experience into improvement?"
Across industries, organizations are increasingly recognizing that long-term performance depends not only on experience but also on the systems that support continuous learning and improvement. Companies are investing in structured performance management, ongoing employee development, and knowledge-sharing practices to help individuals adapt to changing business environments and build new capabilities over time. Research from McKinsey & Company has highlighted continuous capability building as a key driver of organizational resilience and competitiveness, while the World Economic Forum has identified lifelong learning and workforce upskilling as essential priorities for organizations navigating technological and economic change. Against this backdrop, the question is shifting from how long people have worked to how effectively organizations help them learn and improve throughout their careers.
Although the evidence discussed in this article comes from psychotherapy, the underlying management principle extends well beyond healthcare. Professional services firms—including those in finance, accounting, consulting, legal services, and other knowledge-intensive industries—face similar challenges in developing expertise, maintaining consistent quality, and transferring knowledge as experienced professionals progress through their careers. In these environments, structured learning systems, regular feedback, and peer review may be more reliable indicators of sustained performance than tenure alone, making the research relevant to organizations that depend on professional judgment and continuous improvement.
What the Longitudinal Evidence Shows
Experience creates opportunities to learn. It does not prove that learning occurred.
Psychotherapy offers a rare longitudinal test because patient progress can be tracked repeatedly with standardized measures. In a 2016 study published in the Journal of Counseling Psychology, researchers examined 6,591 patients treated by 170 therapists at a U.S. university counseling center, with an average of 4.73 years of data per therapist and a range reaching nearly 18. Patient progress was measured with the Outcome Questionnaire-45, and clinicians had routine access to that feedback.
The therapists were, on the whole, clearly effective; the study recorded a large overall treatment effect. Yet as they accumulated time and cases, average patient improvement declined by a small but statistically significant amount. Individual trajectories varied widely: some therapists kept improving, and early termination became less common as experience grew. The average still moved the other way, even with progress data in front of the clinicians.
Other research points in the same cautious direction. A meta-analysis of 22 studies found a small positive association overall between therapist experience and outcomes for clients with depression and anxiety, an effect that weakened when treatments followed standardized manuals. A 2022 longitudinal replication in the German healthcare system, covering 241 therapists and 3,432 patients, found essentially no association between experience and outcomes across every way the researchers measured both, with preliminary evidence that experienced therapists reached similar results in fewer sessions.
None of this shows that experienced professionals become worse. It shows that time served did not reliably convert itself into better outcomes. The management error is not valuing experience; it is treating years as evidence of improvement, which overvalues repetition and undervalues demonstrated growth.
What Turns Experience Into Expertise?
A practical learning loop has four parts:
A visible outcome signal. The organization defines the change it expects and gathers evidence capable of showing whether the work is moving.
Informed challenge. Peers or supervisors can inspect the reasoning behind the work and are expected to question it.
Common standards. Development does not depend on the luck of which supervisor an employee receives.
A response rule. When the evidence stalls or worsens, someone reviews the work and decides what changes.
Professional-services outcomes are noisy, so no single number should grade an individual. The purpose of measurement is to surface work for review, not to automate professional judgment. The therapists in the 2016 study had real-time outcome data, and access alone bent nothing.
What bends the curve is what surrounds the data. A separate 2016 case study from the same research team followed 5,128 patients treated by 153 therapists over seven years at a Canadian counseling agency that combined routine outcome monitoring with ongoing consultation, planned use of feedback and deliberate practice. Outcomes improved, at the agency level and within individual therapists, and the gains were not explained by the agency simply hiring better people later. As an observational case study it cannot prove causation. It does offer an operating model leaders can test: data tied to review, challenge and targeted practice.
The organizational stakes extend beyond client outcomes. A 2021 systematic review of 32 studies found associations between effective clinical supervision, lower burnout and greater staff retention, with results varying on the quality of the supervision itself. A recurring meeting labeled development is not automatically development. Counting the meetings is measuring the wrong thing.
How Manhattan Mental Health Counseling Builds Feedback Into the Work
Manhattan Mental Health Counseling (MMHC), one of the largest in-network telehealth therapy practices in New York, offers a concrete operating example. Founded in 2014, the practice works with more than 90 therapists serving adults and couples across New York State, entirely by secure video, and reports more than 5,000 clients served. It faces a familiar professional-services problem: how to add capacity without letting quality depend on informal mentoring or the judgment of a single supervisor.
According to the practice, MMHC's clinical model combines weekly structured peer consultation, written supervision standards and routine outcome measurement. Every four weeks, active clients are asked to complete the PHQ-9 and GAD-7 symptom measures. A flat or worsening result prompts clinical review; it is not treated as a direct grade of therapist quality.
"Nobody gets better alone. Our therapists sit in structured consultation every week and get their thinking challenged by people who do the same work. That's where the growth happens," said Steven Buchwald, Managing Director of Manhattan Mental Health Counseling.
The components are designed to work together. Measurement makes progress visible, peer consultation makes clinical reasoning reviewable, and written standards reduce variation among supervisors as the practice grows. None of it guarantees improvement. Together, the parts treat clinician development as operating infrastructure rather than an annual training benefit. The clinical philosophy behind the system, shaped by Natalie Buchwald, LMHC-D, the practice's Founding Clinical Chair, treats insight as the starting line rather than the finish: changing how a person's habits and nervous system run takes repeated engagement inside a stable structure, for clinicians as much as for clients.
How Can Leaders Tell Whether Experience Is Producing Expertise?
These psychotherapy findings do not establish how experience affects performance in other professions. They do offer a framework that leaders of law firms, consultancies, accounting practices, and other knowledge businesses can test:
What client or business outcome should improve?
How will we distinguish skill growth from easier assignments, market conditions or other external factors?
Who can inspect and challenge the reasoning of senior professionals?
What common standards govern coaching, and how do we test whether the coaching itself works?
What review is triggered when the evidence stalls?
Experience still matters. The mistake is treating it as proof rather than raw material.
A résumé counts years. A performance system shows whether those years compound.
About Manhattan Mental Health Counseling
As of July 2026, Manhattan Mental Health Counseling is an online psychotherapy practice that accepts insurance and serves adults and couples across New York State, including the five boroughs, Long Island, Westchester, and upstate communities. All sessions are delivered by secure video. MMHC works with 91+ therapists and reports having served more than 5,000 clients since 2014. Per its current insurance page, the practice is in-network with Aetna, Cigna, United Healthcare (including Oxford and Optum plans), Healthfirst, Molina Healthcare, Affinity, Medicare and Medicare Advantage, Fidelis, TRICARE, and Oscar. Coverage and clinician paneling vary by plan; MMHC verifies each client's specific benefits before the first session. Steven Buchwald is MMHC's Managing Director; Natalie Buchwald, LMHC-D, is its Founder and Founding Clinical Chair.