DIT therapy

What is dynamic interpersonal therapy?

Dynamic interpersonal therapy (DIT) is a brief, manualised psychodynamic therapy developed by Alessandra Lemma, Mary Target and Peter Fonagy. It was designed specifically for the treatment of depression and is available within NHS Improving Access to Psychological Therapies (IAPT) services as a NICE-recommended option for moderate to severe depression. DIT is delivered over a fixed course of 16 weekly sessions and offers a structured, time-limited alternative to traditional open-ended psychodynamic therapy.

At its heart, DIT is based on the principle that depression often arises in the context of difficulties in our close relationships. These difficulties may involve current conflicts, losses, or the activation of longstanding relational patterns that were shaped by earlier experiences. DIT helps you identify a core, recurring interpersonal pattern, known as an interpersonal affective focus (IPAF), that is driving or maintaining your depression.

The IPAF captures a characteristic way of relating that involves a specific emotional dynamic. For example, you might long for closeness but expect rejection, leading you to withdraw and feel more isolated and depressed. Or you might suppress your anger to maintain a relationship, only to feel resentful and depleted. By bringing this pattern into awareness and exploring it within the therapeutic relationship, DIT helps you develop new ways of understanding and managing your emotional life.

DIT integrates attachment theory, object relations and mentalisation-based concepts into a practical, focused treatment. It is explicitly time-limited, which helps maintain focus and momentum.

What makes DIT distinctive is its combination of psychodynamic depth with structured brevity. Traditional psychodynamic therapies tend to be open-ended and exploratory. DIT takes the most powerful elements of this tradition, particularly the focus on unconscious relational patterns and the use of the therapeutic relationship as a vehicle for change, and packages them into a 16-session format that is accessible, focused and evidence-based.

DIT also places significant emphasis on mentalising, the capacity to understand your own and others’ behaviour in terms of underlying mental states. When depression takes hold, mentalising often deteriorates. You may become rigid in how you interpret other people’s behaviour, lose touch with your own feelings, or struggle to step back and reflect on what is happening in your relationships. DIT helps restore and strengthen this capacity, which has benefits that extend well beyond the specific relational pattern targeted in therapy.

When it helps

DIT is primarily designed for depression and has the strongest evidence in this area, but it can also be helpful for:

• Moderate to severe depression
• Recurrent depression
• Depression linked to relationship difficulties
• Emotional distress following relationship breakdown
• Adjustment to loss, bereavement or life transitions
• Anxiety in the context of interpersonal difficulties
• Low self-esteem connected to relational patterns
• Difficulty forming or maintaining close relationships
• Emotional difficulties that seem connected to repeating relational themes

DIT is particularly well suited when your low mood appears to be connected to what is happening in your relationships, or when you recognise that you tend to end up in similar kinds of painful interpersonal situations. It is also a good option if you are drawn to understanding the deeper relational roots of your depression but want a therapy that is structured and time-limited rather than open-ended.

People experiencing depression after a significant loss or relationship breakdown often find DIT particularly helpful. Grief can activate longstanding patterns of relating that intensify the emotional impact of the loss, and DIT is well equipped to help you understand and work with these connections. Similarly, if you notice that your anxiety tends to centre on relationships, whether that involves fear of rejection, difficulty trusting others, or a pattern of withdrawing when things become emotionally intense, DIT can help you understand the underlying dynamics.

Who is DIT suitable for?

DIT is suitable for adults experiencing depression or emotional distress that is connected to difficulties in their relationships. You do not need a formal diagnosis to benefit, although the approach has the strongest evidence for moderate to severe depression.

DIT may be a particularly good fit if you recognise any of the following:

• You tend to find yourself in the same kinds of painful relationship situations, even when you try to do things differently
• Your mood drops noticeably when there is conflict, distance or disappointment in a close relationship
• You struggle to express your needs in relationships, or find that expressing them tends to lead to outcomes you dread
• You have experienced a significant loss, separation or bereavement and your emotional response feels more intense than you expected
• You notice that your self-esteem is closely tied to how others respond to you
• You are drawn to understanding the emotional roots of your difficulties rather than focusing solely on symptoms

DIT is designed for people who can engage in a reflective, conversational therapy and who are willing to explore how their relational history shapes their present experience. Your psychologist will discuss whether DIT is the right fit during the initial assessment.

What to expect

DIT is a structured 16-session therapy delivered weekly. It follows a clear three-phase model.

The assessment and formulation phase (sessions 1 to 4)

The initial phase focuses on assessment and formulation. Your psychologist will explore your current difficulties, map your key relationships and work with you to identify your interpersonal affective focus (IPAF). This formulation becomes the compass for the rest of the therapy, guiding where you direct your attention and energy.

The process of identifying your IPAF involves looking at the patterns that show up across your relationships, both past and present. Your psychologist will pay attention not only to what you tell them but also to how you tell it, noticing the emotions that arise as you describe particular relationships and the way you position yourself in relation to others. The aim is to distil the core relational dynamic that is most closely connected to your depression.

For example, your IPAF might capture a pattern in which you long to be recognised and valued but expect to be overlooked, leading you to work excessively hard to prove your worth while feeling increasingly resentful and exhausted. Or it might involve a tendency to idealise others and then feel devastated when they inevitably disappoint you. The IPAF is specific to you and is developed collaboratively, so that it genuinely reflects your experience rather than being imposed from outside.

Your psychologist will share the formulation with you, usually in both written and diagrammatic form, so that you have a clear, shared understanding of the pattern you are working with.

The middle phase (sessions 5 to 12)

The middle phase forms the core of the work. Sessions focus on exploring the IPAF as it plays out in your current relationships, in your past and, importantly, in your relationship with your psychologist. You will be encouraged to notice how the pattern emerges, what feelings it evokes and what it leads you to do.

A central technique in DIT is the use of the therapeutic relationship as a window into your relational patterns. If your IPAF involves expecting rejection, for example, your psychologist will pay attention to moments when you seem to pull back or test the relationship, and will bring these observations into the conversation with warmth and curiosity. This is not about catching you out. It is about creating a live, real-time experience of noticing a pattern and exploring it together, which is far more powerful than simply talking about it in the abstract.

Your psychologist will help you mentalise, developing a richer and more nuanced understanding of your own and others’ internal worlds. This might involve exploring what a particular situation made you feel, what you imagined the other person was thinking, and what other possibilities there might be. Over time, this builds your capacity to hold multiple perspectives and to respond to interpersonal situations with greater flexibility and emotional awareness.

Sessions may also involve exploring the origins of your IPAF, looking at how the pattern was learned and why it made sense at the time, even if it is no longer serving you well. This is not about blaming your past or your caregivers. It is about understanding, with compassion, how you came to relate in the way you do.

The ending phase (sessions 13 to 16)

The final phase addresses the ending of therapy, which is treated as a significant event in its own right. Endings can activate many of the relational themes that brought you to therapy, making this a valuable opportunity for further learning. If your IPAF involves fears of abandonment, for example, the ending of therapy provides a chance to experience a planned separation in a different way, with support and reflection.

Your psychologist will help you review your progress, consolidate your understanding of your IPAF and plan for maintaining your gains. You will reflect on how the pattern has shifted, what you have learned about yourself and your relationships, and how you can continue to apply this understanding going forward.

DIT is not intended to address every difficulty in your life, but by focusing deeply on one core relational pattern, it can produce meaningful and lasting change that extends well beyond the specific issue targeted in therapy.

What does a typical DIT session look like?

Each DIT session lasts 50 minutes and follows a broadly consistent structure, although the content varies depending on the phase of therapy and what you bring.

A typical session begins with your psychologist inviting you to share what has been on your mind since the last session. This might involve a relationship interaction that troubled you, a shift in your mood, or a feeling that stayed with you during the week. Your psychologist will listen carefully, paying attention not only to the content but also to the emotional tone, the relational dynamics at play, and any connections to your IPAF.

Much of the session involves a collaborative exploration of these experiences. Your psychologist may ask what you imagined the other person was feeling, what you felt in your body, or what you found yourself doing in response. These questions are designed to support mentalising, helping you develop a richer understanding of what is happening beneath the surface of your interactions. The process of wondering together is itself therapeutic.

Your psychologist will also draw links between what you describe and the IPAF formulated in the early sessions. This is not about fitting every experience into the same pattern, but about noticing when the pattern is active and exploring what it feels like in the moment. At times, your psychologist may gently draw attention to how the pattern might be playing out between the two of you in the session itself. This kind of observation, offered with warmth and curiosity, is one of the most powerful aspects of DIT.

Unlike more behavioural therapies such as CBT, DIT sessions do not typically involve homework or structured exercises. The work happens through conversation, reflection and the experience of being understood within the therapeutic relationship.

The evidence for DIT

DIT has a solid evidence base, developed primarily within the UK NHS. It was designed to meet the need for an evidence-based psychodynamic therapy that could be delivered within the IAPT framework, and it has been evaluated in NHS settings serving a broad and diverse population.

NICE recommends DIT as a treatment option for moderate to severe depression within its clinical guidelines. This recommendation is based on research demonstrating that DIT produces significant improvements in depressive symptoms, with outcomes comparable to other NICE-recommended therapies such as CBT and IPT.

The Tavistock and Portman NHS Foundation Trust, where DIT was developed, has conducted extensive research into the approach. Studies have shown that DIT reduces depressive symptoms, improves interpersonal functioning and enhances mentalising capacity. Importantly, these benefits have been observed in routine clinical practice, not just in controlled research trials, suggesting that the approach works well in real-world settings.

Research has also highlighted the value of DIT’s focus on relational patterns. Studies suggest that changes in interpersonal functioning and mentalising capacity may be important mechanisms through which DIT achieves its effects, supporting the theoretical model that underpins the approach.

DIT sits within a broader tradition of psychodynamic research, which has accumulated substantial evidence over the past two decades. Meta-analyses of short-term psychodynamic therapies, the category to which DIT belongs, consistently show that these approaches are effective for depression and that their benefits tend to increase over time, a pattern sometimes called the “sleeper effect,” where gains continue to grow after the end of therapy.

Evidence for online delivery of brief psychodynamic therapies has grown considerably. Research and clinical experience from NHS IAPT services and independent practice suggest that DIT can be delivered effectively through video, with outcomes comparable to face-to-face delivery. The structured, conversational format of DIT translates naturally to the online setting.

How DIT compares to other therapies

Understanding how DIT differs from other approaches can help you decide whether it is the right choice for your situation.

DIT and CBT. Cognitive behavioural therapy focuses on the relationship between thoughts, feelings and behaviours, using structured techniques and between-session tasks to change unhelpful thinking patterns. DIT, by contrast, focuses on the relational and emotional patterns that underlie your distress, with more emphasis on understanding deeper interpersonal dynamics. CBT tends to be more symptom-focused, while DIT aims to shift the relational patterns that give rise to symptoms. Both are NICE-recommended for depression, and some people benefit from one approach after having tried the other.

DIT and interpersonal therapy (IPT). Both DIT and IPT focus on the connection between mood and relationships. However, IPT works primarily at the level of current interpersonal problems, such as role disputes, role transitions and grief, without exploring the unconscious relational patterns that DIT addresses. DIT draws more explicitly on psychodynamic and attachment theory and uses the therapeutic relationship as an active tool for change.

DIT and longer-term psychodynamic therapy. Traditional psychodynamic therapy is typically open-ended and exploratory, allowing themes to emerge over time without a predetermined structure. DIT takes the core principles of psychodynamic work and delivers them within a focused, 16-session structure. This makes DIT more accessible for people who want psychodynamic depth without an open-ended commitment, and it is better suited to evaluation within evidence-based frameworks.

DIT and mentalisation-based treatment (MBT). DIT incorporates mentalising as a core component, but it is distinct from MBT, which was developed for more complex and longstanding relational difficulties and is delivered over a longer period. DIT applies mentalising principles within a brief format, focusing on how mentalising breaks down in the context of your core relational pattern and depression.

DIT at The Online Psychologists

At The Online Psychologists, DIT is delivered by HCPC-registered clinical and counselling psychologists who have specific training in dynamic interpersonal therapy. Our psychologists are experienced in working with the IPAF model and understand how to use the therapeutic relationship effectively within a time-limited structure.

Online delivery suits DIT well. The therapy is built around conversation, reflection and the careful exploration of relational dynamics, none of which requires physical presence in the same room. Video sessions provide sufficient visual and emotional information for the kind of attuned, responsive work that DIT involves. Many clients report that being in their own environment helps them speak more openly about difficult relationship dynamics.

When you contact us, we begin with a matching process to pair you with a psychologist experienced in DIT who is a good fit for your particular difficulties. We consider the nature of your concerns, your preferences and your previous therapy experience. If DIT is not the most appropriate approach for your situation, your psychologist will discuss alternatives with you.

Sessions are held weekly and last 50 minutes, with the full course running over 16 sessions. The time-limited structure is a core feature of DIT and helps maintain the focus and momentum that make the approach effective. Your psychologist will agree the start and end dates with you at the outset so that you both have a clear shared framework.

DIT at TOP may suit you if your depression feels connected to what is happening in your relationships, if you notice that you tend to repeat painful relational patterns, or if you are interested in understanding the deeper emotional dynamics behind your low mood. It is also a good option if you have found symptom-focused therapies helpful but want to explore the relational roots of your difficulties in a structured, time-limited way.

If you would like to find out whether DIT might be right for you, please get in touch. We are happy to answer any questions and can help you decide whether this approach is a good fit for your particular situation.

Frequently asked questions

How is DIT different from counselling? DIT is a manualised, evidence-based therapy with a specific theoretical model and structured approach. While counselling provides a supportive space to talk through your concerns, DIT works in a more targeted way, identifying a core relational pattern and using the therapeutic relationship to actively explore and shift that pattern. DIT is recommended by NICE for depression, and it draws on psychodynamic, attachment and mentalisation-based principles to create a focused and effective treatment.

Do I need to have a diagnosis of depression to benefit from DIT? DIT was developed primarily for depression and has the strongest evidence in this area. However, the approach can also be helpful for emotional distress that is closely connected to relationship patterns, even if your difficulties do not fit neatly into a diagnostic category. Your psychologist will assess whether DIT is appropriate for your particular situation during the initial sessions.

What happens after the 16 sessions are over? Many people find that the understanding they gain through DIT continues to develop after therapy ends. The IPAF gives you a framework for recognising your core pattern as it arises in daily life, and the mentalising skills you build during therapy continue to strengthen with practice. If further therapy is needed, your psychologist will discuss options with you as the ending approaches, which might include a further course of DIT or a different therapeutic approach.

Will I have to talk about my childhood? DIT does explore how your relational patterns were shaped by earlier experiences, but only in the service of understanding your current difficulties. The focus remains firmly on the present, with the past used to illuminate why certain relationship dynamics feel so familiar and emotionally charged. Your psychologist will guide this exploration sensitively and will not push you to discuss anything before you are ready.