For over 130 years, the theories of Sigmund Freud have occupied a complex space in the history of science—often celebrated for their cultural influence, yet frequently dismissed by hard-science practitioners as lacking empirical grounding. However, a groundbreaking scientific analysis published in the journal Entropy suggests that the divide between psychoanalysis and neuroscience may be far narrower than previously assumed. By bridging the gap between Freud’s foundational observations and the contemporary "predictive brain" paradigm, researchers are uncovering a surprising convergence that could redefine our understanding of mental health and human behavior.
The study, authored by researchers Erik Stännicke, Bendik Hovet, and Line Indrevoll Stännicke, alongside their colleagues, argues that the biological mechanisms now being mapped by neuroscientists align closely with the psychological processes described by psychoanalysts for more than a century. This synthesis suggests that while the two fields utilize different vocabularies—one relying on mathematical modeling and neurobiology, the other on subjective experience and developmental history—they are both effectively investigating the same fundamental human architecture.
The Brain as a Prediction Machine
At the heart of this research is the concept of the brain as a "prediction machine." In modern cognitive neuroscience, this model has gained significant traction, positing that the brain does not operate as a passive receiver of sensory information. Instead, it functions as a proactive engine, constantly anticipating what the environment will throw at it next.
According to this framework, the brain generates a continuous stream of predictions about the world. It then compares these internal models against the actual sensory data it receives. When there is a mismatch—a "prediction error"—the brain must adjust its model to align with reality. This ongoing cycle of prediction and correction is believed to be the primary engine driving our perception, decision-making, and emotional regulation. By minimizing these errors, the brain maintains stability, ensuring that our internal understanding of the world remains coherent.
The researchers behind the new paper argue that psychoanalysis has essentially been describing these same processes at a subjective, psychological level. "For over 130 years, psychoanalysis has developed psychological theories about how predictions take place at a subjective level, which cognitive neuropsychology is now studying at a physiological level," the authors note.
Bridging Projection and Inference
One of the most compelling connections identified in the analysis is the parallel between the psychoanalytic concept of "projection" and the neuroscientific concept of "inference."
In psychoanalysis, projection is a defense mechanism wherein an individual attributes their own suppressed feelings, intentions, or qualities onto others. A person who harbors hidden hostility, for example, may perceive others as being unnecessarily aggressive toward them. The new analysis suggests that this is not merely a metaphor; it is a manifestation of the brain’s predictive nature. When the brain interprets the world, it does so through the lens of established expectations—often shaped by previous, formative experiences.
Stännicke explains that when we attribute specific qualities or intentions to others, our brains are actively shaping our sensory experience to match our pre-existing mental models. If a person has a history of rejection, their brain may become hyper-vigilant, scanning the environment for signs of disapproval. An ambiguous facial expression or a neutral comment might be interpreted as a slight, not because it objectively is one, but because the brain has predicted that rejection is the most likely outcome and interprets incoming data through that specific filter.
The study categorizes this into two neuroscientific processes: "perceptual inference" and "active inference." Perceptual inference is the brain’s attempt to update its internal model when the sensory evidence is too strong to ignore. Active inference, conversely, involves behaving in ways that force the world to align with our predictions. If we expect people to be hostile, we may act in a defensive or cold manner, which in turn elicits the very hostility we feared, thereby confirming our initial, biased prediction. This explains why people often remain trapped in subjective versions of reality that do not reflect the objective world.
The Persistence of Maladaptive Patterns
A critical question addressed by the research is why the brain often clings to inaccurate or harmful expectations. If the brain is designed to be an efficient machine, why does it repeatedly fall back on patterns that cause personal suffering or failed relationships?
The answer lies in the biological principle of homeostasis. Just as the body seeks to maintain a stable internal temperature or heart rate, the mind seeks psychological stability. Reducing uncertainty is a key component of this homeostatic drive. Familiarity—even when that familiarity is painful—is less uncertain than the unknown.
"Psychoanalysts refer to the tendency in the mind to recreate familiar relational patterns, even when these are poorly adapted," Stännicke explains. This explains the persistence of chronic mental health symptoms. A "critical voice" or a sense of impending abandonment may be inaccurate, but it is highly predictable. Because the brain has invested so much energy in building these models, it often views them as "stable" despite their lack of flexibility. Replacing these deep-seated models requires a significant expenditure of cognitive energy, which is why changing long-standing patterns of behavior is notoriously difficult and time-consuming.
Procedural Memory and the Limits of Reasoning
Perhaps the most significant takeaway from the study is the distinction between conscious beliefs and procedural memory. Many patients in psychotherapy intellectually recognize that their fears—such as the fear that a partner will leave them—are irrational. Yet, despite this intellectual awareness, they cannot stop the emotional or physiological reaction.
The researchers argue that these expectations are often anchored in procedural memory—the same type of memory that allows us to ride a bicycle or tie our shoes without thinking. These relational habits are "expressed in relational ways of being." They are not just thoughts that can be argued away with logic; they are deeply ingrained, automatic responses.
This highlights the limitations of purely cognitive approaches to therapy. If a behavior is rooted in procedural memory, it may require a different, more experiential approach. The therapeutic relationship itself becomes a crucial laboratory for change. By interacting with a therapist in a safe, consistent environment, patients can undergo repeated, corrective experiences that slowly weaken the old, maladaptive predictions and allow for the formation of new, more flexible ones.
Toward a Holistic Science of the Mind
The integration of psychoanalysis and modern neuroscience does not imply that every one of Freud’s original theories has been validated by contemporary science. Rather, the study suggests that the two traditions offer complementary tools for understanding the human condition. Neuroscience provides the "how"—the physical mechanisms and mathematical models of the brain—while psychoanalysis provides the "what"—the lived, emotional experience of the individual.
By bringing these two fields into a shared dialogue, researchers believe they can foster a more holistic psychology. This integrative approach acknowledges that subjectivity is not an obstacle to science, but a vital component of it. As the study concludes, understanding the brain through the lens of its own predictions—and how those predictions are colored by a lifetime of personal experience—offers a promising path forward for treating complex mental health conditions. By studying the physical mechanisms of the brain alongside the deeply personal narratives of the individual, science may finally be moving toward a more complete and compassionate understanding of what it means to be human.
