Understanding the Role of SUD in EMDR Therapy Sessions

Imagine sitting across from a therapist, recounting a painful memory that still lingers like a shadow in your mind. As you speak, you’re asked to rate the intensity of the distress you feel—something as simple as a number between 0 and 10. This number, known as the Subjective Units of Disturbance (SUD), plays a surprisingly pivotal role in a therapy called Eye Movement Desensitization and Reprocessing (EMDR). It might seem like a small detail, but the SUD scale is a window into the emotional landscape of healing, guiding both client and therapist through the often complex terrain of trauma recovery.

Why does this matter? In many therapeutic approaches, emotions are discussed in broad terms—“mild,” “moderate,” or “severe.” EMDR, however, invites a more nuanced dialogue. The SUD scale captures the fluctuating intensity of distress in real time, offering a measurable, yet deeply personal, way to track progress. This practice reflects a larger cultural shift toward valuing subjective experience alongside clinical observation. Yet, this very subjectivity introduces a tension: How reliable is a person’s self-report when emotions are so fluid and sometimes difficult to articulate?

Consider the example of a veteran navigating post-traumatic stress disorder (PTSD). During EMDR sessions, the veteran might initially rate a traumatic memory at a 9 on the SUD scale. Over time, as the therapy unfolds, those numbers may drop, signaling emotional relief. But what if the veteran’s cultural background encourages stoicism or emotional restraint? The SUD rating might not fully capture their internal experience, creating a subtle but important contradiction between what is expressed and what is felt. Therapists and clients often find a delicate balance here, blending objective methods with empathetic understanding, much like how modern workplaces strive to measure productivity without overlooking employee well-being.

The Practical Role of SUD in EMDR Therapy

At its core, the SUD scale is a tool for communication within EMDR therapy. EMDR itself emerged in the late 1980s, pioneered by psychologist Francine Shapiro, who noticed that certain eye movements seemed to reduce the distress tied to traumatic memories. Since then, it has evolved into a structured process involving bilateral stimulation—often eye movements, taps, or sounds—paired with recalling distressing memories. The SUD scale helps therapists gauge how a client’s emotional response shifts during this process.

The scale typically runs from 0 (no distress) to 10 (worst distress imaginable). This numeric rating allows for a shared language, helping therapists adjust the therapy in real time. For example, if a client’s SUD rating remains high after a set of eye movements, the therapist might explore different angles or techniques to facilitate processing. Conversely, a decrease in SUD signals progress and can be reassuring for both parties.

Historically, the idea of quantifying subjective experience is not new. In the early 20th century, psychologists like Wilhelm Wundt sought to measure sensations and feelings with rudimentary scales, attempting to bring order to the messy world of human emotion. Today, the SUD scale carries forward this legacy but does so with the added complexity of trauma’s deep imprint on memory and identity.

Emotional Patterns and Communication in Therapy

The SUD scale also reveals something about how people communicate their inner worlds. Emotions are notoriously difficult to convey with precision, and trauma adds layers of fragmentation and avoidance. The act of assigning a number to distress can feel both empowering and reductive. It empowers by giving a client a voice, a way to quantify what might otherwise feel overwhelming or vague. Yet, it can also reduce rich emotional experience to a simple digit, risking oversimplification.

This tension mirrors broader social patterns around emotional expression. In some cultures, openly discussing distress is encouraged and normalized; in others, it is suppressed or stigmatized. Therapists working with diverse clients often navigate these cultural nuances, adapting how they interpret and respond to SUD ratings. For instance, a client from a culture that prizes emotional restraint might underreport distress, while another from a culture that encourages expressive sharing might rate distress more openly.

Such patterns also influence relationships outside therapy. The way people express and interpret emotional intensity affects communication with partners, friends, and colleagues. The SUD scale, in its clinical setting, offers a microcosm of these everyday dynamics—highlighting the ongoing challenge of truly understanding another’s internal experience.

Historical Shifts in Understanding Emotional Distress

Looking back, the ways humans have understood and measured emotional distress have shifted dramatically. Ancient societies often linked distress to spiritual or moral causes, using rituals or storytelling to “heal” emotional wounds. The Enlightenment brought a more scientific lens, with early psychologists attempting to classify emotions and mental states systematically.

In the 20th century, trauma itself became a recognized category, especially after wars and social upheavals brought conditions like PTSD into public awareness. EMDR’s development in the late 20th century reflected this growing understanding, combining neuroscience, psychology, and experiential techniques.

The SUD scale embodies this evolution: a simple yet profound acknowledgment that emotional distress is both deeply personal and, to some extent, measurable. It challenges the assumption that feelings are too elusive to quantify, while reminding us that numbers alone can never tell the whole story.

Multiple Perspectives on SUD’s Role in Healing

Within the EMDR community and beyond, opinions vary on how best to use the SUD scale. Some emphasize its precision and utility as a marker of progress. Others caution against over-reliance on numerical ratings, warning that it might cause clients to focus too much on “scoring” their feelings rather than experiencing them fully.

This tension reflects a broader debate in psychology: the balance between measurement and meaning. When one side dominates, therapy risks becoming mechanical, losing the human connection that fuels healing. On the other hand, neglecting measurement can leave progress vague and difficult to assess.

A balanced approach treats the SUD scale as a guide rather than a rule. It invites reflection, dialogue, and flexibility—much like effective communication in any relationship. Clients and therapists work together to interpret the numbers in context, recognizing that emotional healing is rarely linear or predictable.

Irony or Comedy in Measuring Emotional Pain

It’s worth noting a bit of irony in the SUD scale’s existence. Here we have a tool that asks people to rate some of their most intense emotional pain on a scale that looks suspiciously like a product rating on Amazon. “How would you rate your trauma today? One star or five stars?” This comparison highlights the absurdity of trying to quantify something as complex and deeply human as distress.

Yet, this very absurdity underscores the creativity of human attempts to make sense of suffering. Just as we use ratings for movies, restaurants, or apps, the SUD scale uses numbers to navigate the messy terrain of emotion—bringing a hint of order to chaos, even if imperfectly.

Attention, Flow, and Emotional Balance in Healing

Understanding the role of SUD in EMDR therapy also invites reflection on how attention shapes our experience of distress and healing. Emotional regulation, memory, and creativity all depend on how we manage our focus and awareness.

Two complementary patterns of attention are often discussed in psychology and traditional practices alike: focused attention and relaxed, open awareness. Focused attention involves concentrating on a single point—like rating your distress on the SUD scale or following the therapist’s guidance during EMDR. Relaxed, open awareness allows for a broader, non-judgmental observation of thoughts and feelings, fostering emotional balance and insight.

These attention states are explored in various disciplines, from Flow Psychology to classical Yoga, and are also central to neurofeedback training. Interestingly, EMDR’s bilateral stimulation—alternating left-right eye movements or taps—can be seen as a way to balance attention, encouraging the brain to integrate distressing memories more smoothly.

Meditatist.com offers a collection of background sound tools designed to help people explore these attention states. Their Attention Balancing sound and Bilateral Sound use gentle alternating left-right stimulation, echoing the principles found in both EMDR therapy and ancient Yoga practices. These tools are used worldwide by individuals, families, educators, and clinicians to support emotional regulation, creativity, learning, and recovery.

The evolving understanding of SUD and attention highlights a broader human quest: to find balance between focus and openness, measurement and meaning, distress and healing. This balance not only supports individual well-being but also enriches relationships, creativity, and cultural communication.

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The writing of this article was overseen by Peter Meilahn, Licensed Professional Counselor, Oregon, USA (Oregon License C9007).

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