When people think about what makes therapy effective, they often think first about techniques. The specific tools a therapist uses, the framework they work within, the exercises or approaches they bring to a session. It is a reasonable starting point. But decades of psychotherapy research have arrived at a more nuanced and, in some ways, more interesting answer. What most reliably predicts whether therapy will help someone is not which approach is used. It is the quality of the relationship between therapist and client.
This finding has accumulated across hundreds of studies and multiple meta-analyses. It does not mean that therapeutic approaches are interchangeable, or that training and clinical thinking do not matter. It means that the relationship is not a pleasant backdrop to the real work. In relational psychodynamic therapy, it is the real work, and understanding why that is the case helps explain what this approach
offers that briefer or more structured alternatives sometimes do not.
Why the Relationship Changes Things
The patterns that bring most people to therapy, difficulty trusting others, a harsh inner critic, a tendency to repeat the same dynamics in different relationships, an inability to ask for what they need, were not formed in isolation. They developed inside relationships, most often early ones, in response to the emotional environment in which a person grew up. A child who learned that vulnerability was
unsafe, that needs were too much, or that love was conditional on performance, does not simply leave that learning behind in adulthood. It becomes part of how they experience themselves and others, operating largely below the level of conscious awareness.
This is why talking about patterns, while genuinely useful, is rarely sufficient on its own to shift them. Understanding where something comes from does not automatically change how it feels or how it operates in daily life. What tends to produce more lasting change is a different kind of relational experience, one in which the patterns can emerge and be worked with in real time, within a relationship
that offers something different from what originally shaped them. That is precisely what the therapeutic relationship in psychodynamic work is designed to provide. Research consistently supports this. Studies examining what predicts good outcomes across therapeutic approaches find that the alliance between therapist and client, characterised by trust, genuine attunement and a sense of working collaboratively toward something meaningful, accounts for a significant proportion of the change that therapy produces. The specific techniques used matter considerably less than this relational foundation.
Why Longer Therapy Produces More Durable Change
One of the clearest findings in the psychotherapy research literature is that the benefits of psychodynamic therapy do not plateau when treatment ends. They continue to grow. People assessed months or years after completing long-term psychodynamic work consistently show greater gains than they did at the point of finishing. This sleeper effect, as researchers describe it, suggests that something has
been set in motion during therapy that continues to develop afterward, an internal capacity for reflection, self-understanding and more flexible relating that does not depend on the ongoing presence of a therapist to sustain it.
This distinguishes long-term relational work from approaches that produce quicker results but whose gains are more closely tied to the active application of specific techniques. Both have their place. But for people whose difficulties are chronic, relational, or rooted in early experience, the evidence points toward longer, relationally focused work as producing the most enduring outcomes. Patterns formed
over years, and maintained by processes largely outside conscious awareness, take time to understand, surface and revise. The relationship between therapist and client needs to develop enough depth and safety for the more significant patterns to emerge and be worked with honestly. That depth cannot be manufactured quickly, and attempting to compress it tends to produce a shallower kind of encounter. What
long-term open ended psychodynamic therapy offers, at its best, is not symptom management but a genuine shift in the underlying patterns that generate symptoms in the first place. That shift, when it happens, tends to be durable in a way that more surface-level interventions are not, because it has been worked through relationally rather than applied externally.
Finding the Right Therapist
One thing worth saying directly is that the relationship with your therapist matters enough that it is worth taking time to find the right one. Therapy represents a genuine investment, of time, money and emotional energy, and being selective about who you work with is not only reasonable, it is sensible. Many people speak to two or three therapists before deciding who to work with, and a good therapist will
not only expect this but actively support it. An initial consultation is as much an opportunity for you to assess whether this person feels like someone you could work with honestly over time as it is for the therapist to understand what you are bringing. The fit between therapist and client is not a soft consideration sitting alongside the clinical work. As the research makes clear, it largely is the clinical work.
Getting it right is worth the time it takes.
If you are considering therapy and wondering whether a longer, open ended approach might suit what you are carrying, you are welcome to get in touch at samanthamerry.co.uk/contacts.
Author Bio Samantha Merry is a BACP Senior Accredited Psychotherapist and Clinical Supervisor based in Bromley, South East London. She works from a relational psychodynamic framework with adults navigating complex emotional experience and unresolved personal patterns. Find out more at samanthamerry.co.uk.
Resources
Books Psychoanalytic Psychotherapy by Nancy McWilliams. Authoritative and readable, the clearest account of what relational psychodynamic therapy involves and why it works.
The Great Psychotherapy Debate by Bruce Wampold. The most rigorous examination of what the research actually shows about how therapy works and what drives change.
What Works for Whom by Anthony Roth and Peter Fonagy. A comprehensive and accessible review of the psychotherapy outcome literature for practitioners and informed general readers.
Podcast Therapy Chat with Laura Reagan. A clinician-led podcast covering attachment, trauma and relational themes, interviewing practitioners and researchers across the field.
YouTube Alina | Psychodynamic Psychology. A psychodynamic psychotherapist making clear, accessible content about relational and psychodynamic concepts for a general audience.