The Hidden Factor That Makes Therapy Work (And How to Use It to Choose Your Therapist)

If you've ever wondered what actually makes therapy successful, beyond finding someone qualified and turning up to sessions, you're asking a really good question, and one that research has explored in quite a lot of depth.

This post looks at what the evidence says about what makes therapy work, including a factor that's often overlooked but consistently linked to better outcomes. Understanding this can help you make a more informed choice when looking for a therapist, and feel more confident in that choice too.

It's Not Just About the Type of Therapy

There are many different approaches to therapy, with different names, techniques, and theories behind them. It's natural to assume that some approaches must simply be "better" than others, and that finding the right type of therapy is the key to success.

However, research consistently shows that differences between approaches account for a relatively small part of why therapy works. Other factors, often called common factors because they're common across different approaches, tend to play a much larger role.

The Relationship Matters More Than You Might Think

One of the most well established findings in psychotherapy research is that the quality of the relationship between client and therapist, sometimes called the therapeutic alliance, is strongly linked to outcomes. In plain terms, feeling understood, respected, and able to be honest with your therapist matters a great deal, often more than the specific techniques being used.

This doesn't mean technique doesn't matter at all, but it does mean that who you work with, and how that relationship feels, is genuinely important, not just a nice extra.

Client Preferences Are Part of the Picture Too

Alongside the relationship itself, research has also looked at the role of client preferences, in other words, what someone is looking for in terms of how therapy is delivered and how their therapist works with them.

Studies have found that when therapy aligns with a client's preferences, including things like communication style, pace, and approach, clients tend to report better outcomes and are more likely to stay engaged with therapy (Norcross & Wampold, 2011; Swift, Callahan & Vollmer, 2011).

This doesn't mean preferences should override everything else, but it does suggest that taking them seriously is genuinely worthwhile, not just a matter of comfort.

This is part of why we believe matching shouldn't only be based on the problem someone is facing, but on a fuller picture of who they are. Our post More Than a Symptom: Why a Good Therapist Match Starts With Understanding You explores this in more depth.

If this research resonates with you, it might be worth thinking about how your own preferences could shape your search for a therapist, something our matching questionnaire is designed to help with.

What This Means for Choosing a Therapist

If the relationship and your own preferences matter this much, it makes sense to bring them into your search from the start, rather than treating them as something to figure out after you've already begun.

A few practical ways to do this include:

• Reflecting on your own communication style and what kind of approach tends to suit you, something we explore in our post on understanding your own needs before you start

• Looking beyond qualifications alone when reviewing therapist profiles, and considering how someone describes their way of working

• Giving yourself permission to notice how a first conversation feels, not just whether someone is "qualified enough"

• Considering matching approaches that take preferences into account from the outset, rather than relying on trial and error

Our post on what to look for when choosing a therapist goes into more detail on this.

A More Informed Way to Choose

None of this means there's a guaranteed formula for successful therapy, and it's important to be honest about that. Therapy is a deeply human process, and outcomes depend on many factors, including things outside anyone's control.

What the research does suggest, though, is that paying attention to fit, both in terms of the relationship and your own preferences, is a genuinely meaningful part of giving therapy the best chance of working for you. If you'd like to understand how this fits into the wider process of finding a therapist, our complete guide to finding the right therapist brings everything together, anchor text: "our complete guide to finding the right therapist".

Bringing the Research Into Your Own Search

It can feel reassuring to know that paying attention to fit isn't just a personal preference, it's something supported by evidence. You're not being "fussy" by caring about how a therapist works with you, you're paying attention to something that genuinely matters.

If you'd like a starting point that takes your preferences seriously from day one, our matching questionnaire was built with exactly this research in mind. It takes just a few minutes, find a therapist who's likely to be a genuine fit.

A note on crisis support: If you're currently in crisis, having thoughts of harming yourself, or feel unable to keep yourself safe, please reach out for immediate support. In the UK, you can contact Samaritans free, 24/7, on 116 123, or text SHOUT to 85258. If you're outside the UK, please contact your local emergency services or a crisis line in your area.

About the author: Dr Sam Price is a Counselling Psychologist and co-founder of Fable Psychology. He is focused on helping clients find the right therapist to get the support they need.