What is IFS?

Internal Family Systems (IFS) is a psychotherapeutic model based on the premise that every person naturally consists of multiple inner ‘parts’ and the Self. IFS does not view these different aspects as a sign of dysfunction, but as a natural and healthy characteristic of the human psyche.

Origin

IFS was developed in the 1980s by Dr Richard C. Schwartz. He observed that clients spoke about different ‘parts’ of themselves in a way that suggested separate individuals. Drawing on his background in systemic family therapy, he explored whether these inner parts could be approached in a similar way to members of a family. This research formed the basis for the model that has since been applied and further developed worldwide.

Parts and the Self

Within IFS, inner parts are understood to function like members of a family. Some parts fulfil a protective role. Other parts carry pain, fear or sadness from the past and therefore often remain in the background. None of these parts is considered ‘wrong’ within the model; each part acts from an originally positive intention, even when the strategy used is no longer effective.

According to IFS, behind these parts lies an inviolable core: the Self. This Self is characterised by calm, clarity and compassion, and has the capacity to understand and guide the inner parts. Under this inner guidance, parts that have become stuck in an extreme role can gradually relax, resulting in greater balance, calm and self-compassion.

Model characteristics

A distinctive feature of IFS is its non-pathologising approach: the system is not regarded as damaged, and even persistent patterns are understood in terms of their original function. This approach makes IFS an accessible method for many clients, including those dealing with issues involving shame or self-criticism.

Internationally, IFS is used in a wide range of settings, and there is growing scientific evidence for the model’s effectiveness, including in trauma, anxiety and depression.

Application of the Model

In individual therapy, IFS is used, among other things, to treat trauma, anxiety, depression and psychosomatic disorders.

IFS has also found a place within couples and family therapy. By mapping the parts of both partners or family members, greater understanding of underlying behavioural patterns emerges, contributing to the restoration of connection and more respectful communication between them.

When working with children and young people, IFS offers a safe and accessible way to explore feelings and behavior, and the model contributes to emotional self-regulation and resilience.

In addition, IFS is gaining ground beyond the traditional therapeutic setting. In coaching, the model is used to overcome inner blocks and arrive at clear, authentic decisions. Within organizations and educational institutions, IFS helps improve group dynamics and foster a culture of understanding and appreciation. The model also combines well with other therapeutic approaches and can be applied to a wide range of issues, from personal development to complex trauma processing.

Scientific evidence

Internal Family Systems: an emerging empirical basis and a solid foundation for further research.

The IFS Institute is actively committed to supporting methodologically robust research into the feasibility, acceptability, safety and (cost-)effectiveness of the therapeutic approach Internal Family Systems (IFS) across a range of clinical presentations. The current, evolving evidence—drawn from small-scale randomized clinical trials and quasi-experimental single-arm studies—indicates that IFS has considerable promise. Positive results have been found, among other settings, in pilot studies involving clients with depressive symptoms and/or post-traumatic stress disorder (PTSD). In addition, several studies report consistent increases in self-compassion.

Although these findings are encouraging, the current evidence base remains limited in size and scope. To establish IFS as an evidence-based intervention for specific mental health conditions, well-designed randomized controlled trials (RCTs) with sufficient statistical power and replication for each clinical indication are needed. To date, a significant reduction in depressive symptoms is the only outcome that has been shown to be statistically reliable across multiple pilot RCTs. Further large-scale research is needed for other clinical indications.

Finally, although several studies report high levels of acceptability and client satisfaction, the risk of potential harm or adverse effects has not yet been sufficiently investigated in a systematic manner. The studies conducted to date provide valuable preliminary insights and form a solid foundation for further in-depth research into IFS.