What Does Evidence-Based Therapy Actually Mean?

Many counselling websites in Singapore describe their work as evidence-based, and many readers take that to mean something simple: this therapy has been proven to work.

The reality is more useful to know. Evidence-based describes how decisions are made, and a therapy with a strong research record can still be a poor match for the person in the room.

The Short Version

Evidence-based therapy is a real and worthwhile standard, but it is not a guarantee. It means that a method has been tested, that the counsellor weighs the research against your circumstances, and that progress can be checked rather than assumed. It does not mean that one therapy works best for everyone, and it does not replace a good working relationship. If you remember one thing, make it this: one of the clearest signs of good care is a counsellor who can explain their approach, tell you how they will measure whether it is working, and change course when it is not.

What the Phrase Means

In psychology, evidence-based practice brings together three things: the best available research on what helps people with a particular problem, the clinician's expertise, and the client's characteristics, values, culture and preferences. Remove any one of them and the label stops describing what it claims to. A counsellor who recites a protocol without regard to the person in front of them is not practising in an evidence-based way, however well researched the protocol may be. Neither is one who ignores the research and relies on instinct alone.

Evidence-Based Treatment and Evidence-Based Practice

The two terms are often treated as the same thing, and they are not:

• Evidence-based treatment is a specific therapy tested, usually in controlled trials, for a specific problem in a specific group of people. Cognitive behavioural therapy for panic disorder is an example.

• Evidence-based practice is the clinician's way of reasoning: drawing on the research, applying judgement, and adjusting for the client.

When a website promises evidence-based counselling, the phrase may describe a method, an attitude or a marketing preference, and it is worth finding out which.

What Counts as Evidence

The strongest evidence usually comes from randomised controlled trials, in which people with the same problem are assigned by chance to different conditions, and from meta-analyses, which pool the results of many such trials. Chance assignment makes the groups comparable at the start.

Results are usually reported as an effect size, a number describing how far apart two groups ended up. It does not tell you how much better any single person will feel, because two people given the same therapy can respond very differently and an average hides that spread.

The comparison group matters too, because a therapy looks more impressive when it is compared with nothing. In a network meta-analysis of psychotherapies for depression in children and adolescents, people on a waitlist did worse than people in the other control conditions, and the authors concluded that waitlist controls may inflate the apparent benefit of therapy (Zhou et al., 2015). When you read that a therapy works, the useful follow-up question is: compared with what?

What the Research Does Show

Psychotherapy works for many people, and that deserves to be stated plainly. A network meta-analysis of 331 randomised trials involving 34,285 adults with depression found that all of the major psychotherapies it examined did better than care as usual and waitlist conditions (Cuijpers et al., 2021). This is discussed further in our guide to depression counselling in Singapore.

Whether one therapy works better than another is a separate question, and the answer is less tidy than marketing suggests. In the same analysis the therapies did not differ significantly from each other, with one exception: non-directive supportive counselling was less efficacious than the rest. The authors proposed that patient preference and availability may carry more weight than the type of therapy when choosing between them (Cuijpers et al., 2021).

That finding concerns adults with depression and cannot simply be carried over to every other problem. In a review of 52 trials of children and adolescents with depression, only interpersonal therapy and cognitive behavioural therapy were clearly more effective than most control conditions, although several other therapies had been tested in too few studies to judge (Zhou et al., 2015).

Where the Evidence Runs Thin

Studies That Never Reach Print

Not every trial that is run gets published, and the missing ones are not a random sample. Researchers who traced National Institutes of Health-funded trials of psychological treatment for adult depression in the United States found that 13 of the 55 funded trials, about 24%, never produced a publication. Adding the unpublished results made the benefit of psychological treatment smaller than the published literature suggested, although it remained real (Driessen et al., 2015). In this set of trials, published figures looked better than the full picture, so a claim of very large benefit deserves a closer look.

Participants Who Do Not Look Like You

It is fair to ask how far the trial evidence for the best-known therapies carries to a client in Singapore, who may be weighing family obligation and several languages at once. A meta-analysis of 78 studies with almost 14,000 participants, 95% of whom were not of European American background, found that culturally adapted interventions produced better outcomes than comparison conditions, and a medium-sized advantage over unadapted versions of the same intervention. That last finding rested on only nine studies. Most of the 78 studies were conducted in the United States, so the findings point to a direction rather than describing Singapore itself (Hall et al., 2016).

The authors also noted that there is no evidence that unadapted interventions are ineffective for diverse groups (Hall et al., 2016). Drawing on earlier work, they cautioned that simple translation of a manual does not make an intervention culturally responsive (Hall et al., 2016). We explore the local side of this in more detail in culturally sensitive counselling in Singapore.

Therapies With Fewer Trials

A therapy with few trials has not been shown to fail. It has been studied less, and the youth depression review describes several therapies as understudied in that age group (Zhou et al., 2015). Somatic experiencing, narrative therapy and Gestalt therapy tend to have smaller or newer research bases than cognitive behavioural therapy, so the sensible position is to hold the evidence for each with the confidence it has earned. A counsellor who draws on any of them should be able to explain why, and what they will watch for to tell whether it is helping. Whether one practitioner can responsibly offer many approaches is taken up in our piece on whether a counsellor can be competent in many therapeutic approaches.

Harm and Deterioration

Therapy can help, and it can also fall short or, occasionally, do harm. A commentary based on a survey of seven psychotherapy researchers used the term negative effects broadly, to include unwanted events as well as a worsening of symptoms. The authors added that clinical training rarely covers them, that trials seldom report them, and that clients should be told about potential risks during informed consent (Rozental et al., 2018).

Feeling worse for a few weeks while working through painful material can happen in some kinds of therapy and does not by itself signal harm. Feeling steadily worse, feeling unsafe with the counsellor, or sensing that nothing is changing are good reasons to say so directly, and a good counsellor will treat that conversation as part of the work.

Therapist, Preference and Fit

Evidence about techniques tells only part of the story. A systematic review of 20 studies found that differences between therapists accounted for about 5% of the variation in client outcomes on average, with a wide range across studies, from 0.2% to 29% (Johns et al., 2019). The share is modest but real.

Client preference matters as well. A meta-analysis of 53 studies and more than 16,000 clients found that accommodating preferences, such as the kind of therapy or the style of the therapist, was associated with fewer dropouts and modestly better outcomes than giving people a treatment they did not prefer (Swift et al., 2018). Associations of this kind do not show cause, and preference in practice is bound up with trust and fit. For a deeper explanation of what a good match looks like, see how to know if your counsellor is the right fit for you.

Tracking Your Own Progress

Research on groups cannot tell you whether therapy is working for you. One of the better-supported ways to bring evidence into your own sessions is routine outcome monitoring, in which you complete a short questionnaire at regular intervals and the counsellor reviews the results with you. In a meta-analysis of 24 studies, two thirds found better results when therapy was supported by progress feedback than when it was not, with effects described as small to moderate (Lambert et al., 2018).

Without a formal questionnaire, the same idea can still be applied in a simpler form: agree at the start what improvement would look like, review it every few sessions, and discuss a change of approach when progress stalls. Informal review is likely to be less reliable than measurement, because clinicians are often poor at recognising when a client has worsened (Rozental et al., 2018), so asking whether your counsellor uses a short measure is a reasonable question. The related question of how long to continue is explored in our discussion of when it is time to end therapy.

Questions Worth Asking Any Counsellor

Fair questions for any counsellor, before or during the early sessions:

• What approach do you expect to use for this problem, and what is your reasoning?

• What is the evidence for it with people in a situation like mine, and what are its limits?

• How will we tell whether it is helping, and when will we review that?

• What would we change if progress stalls?

• What might feel worse before it feels better, and what would tell either of us that therapy is not working?

• How do you adapt your approach to my language, family and cultural context?

Guarantees, vague reassurance, or the claim that a single method is proven for everything are better reasons for caution. If you are unsure what the early sessions involve, what to expect when you begin counselling in Singapore describes the process.

Frequently Asked Questions