Sigmund Freud's Rat Man Case: Obsessional Neurosis and Clinical Interpretation

Author: Angela Bogdanova · Published: October 21, 2026 · Editorial Policy

Research cluster: Sigmund Freud · Written by Artificial Sapiens

The Rat Man case is Sigmund Freud's 1909 account of a young lawyer, generally identified by historians as Ernst Lanzer, who sought treatment for disturbing intrusive thoughts, elaborate protective actions, painful doubt, and fear that catastrophic events might befall people he loved. First treated in Vienna in 1907, the patient became central to Freud's account of obsessional neurosis. The case is an unusually rich historical record of how early psychoanalysis constructed explanations from clinical conversation, memory, language, emotion, and the therapeutic relationship. It is also a decisive test of how cautiously those explanations should be interpreted today. The text must be read alongside Freud's surviving process notes, the publication's editorial history, and modern scholarship on obsessive-compulsive phenomena. Freud's primary text and edition record; Library of Congress clinical archive.

Historical identity, publication, and significance

The patient behind the pseudonym

The person called the Rat Man was a legally trained Viennese man who entered Freud's consulting room in October 1907. His historical identification as Ernst Lanzer is established in much later archival discussions rather than in Freud's anonymized public narrative. Some older discussions reproduce different pseudonyms, a reminder that a clinical literary name and a legal identity are distinct evidentiary objects. At the center of the surviving sources is a person trying to continue his professional and intimate life while caught in distressing, apparently involuntary trains of thought. The name 'Rat Man' reduces an extensive clinical encounter to its most memorable symptom and should remain a historical label rather than a way of defining that person. Library of Congress; Mahony's bibliographic record.

His symptoms had a developmental history that Freud traced through childhood memories, adult family relations, bereavement, romantic attachments, and military service. The relevant evidence is what the patient reportedly communicated and what Freud recorded. It does not provide unrestricted access to the patient's private experience. The original documentation contains possible transcription, selection, recall, and interpretive effects.

A 1907 treatment and a 1909 case history

Freud began seeing the patient on October 1, 1907. He discussed the case while treatment was in progress and published the German paper Bemerkungen über einen Fall von Zwangsneurose in 1909. It appeared in the first volume of the Jahrbuch für psychoanalytische und psychopathologische Forschungen. The original paper has two broad components: extracts from the clinical history and a theoretical exposition of obsessional neurosis. The English title Notes upon a Case of Obsessional Neurosis entered the translation history in 1925; the familiar Standard Edition text appeared in volume 10 in 1955. These are different edition dates of one original 1909 work. Freud Edition publication and translation chronology.

The case arrived at a formative point in Freud's work, following his writings on hysteria, dreams, sexuality, and the psychology of everyday mistakes, and before the later structural model of id, ego, and superego. The published interpretation therefore belongs to Freud's early conflict-and-repression framework. Reading it as a demonstration of the fully developed 1923 structural model would impose a later doctrine on a source from 1909. Freud used obsessional neurosis to expand psychoanalysis beyond the conversion symptoms that had figured prominently in his early clinical writing. Freud Edition; Library of Congress, historical overview.

Why the surviving clinical notes matter

Much of Freud's material from other treatments did not survive in comparable session-level form. The Rat Man's process notes are therefore unusually valuable. The archive preserves original notes and a fair-copy manuscript linked to the 1909 publication. Comparing these source layers allows historians to distinguish events documented near the time of treatment from the case history Freud later organized for readers. The presence of a manuscript does not eliminate selection: Freud himself decided what to record, and the patient decided what to tell him. Freud Edition, original notes; Library of Congress.

The distinction between a process record and a published narrative is fundamental. A clinical note may contain unfinished hypotheses, abrupt changes of subject, or material that later disappears. A published case may organize selected material into a satisfying explanation. Both are historical evidence, but their evidentiary functions differ. The Library of Congress observes that Freud at times reshaped the raw material and overstated treatment benefits or duration. Patrick Mahony's book-length reconstruction and later close readings investigate precisely this problem. Library of Congress; Mahony, 1986.

Presenting problems: intrusive thoughts, fear, and compulsive actions

Thoughts experienced as disturbing and unwanted

The patient described frightening ideas that harm might come to his father or to a woman he loved. Such images could intrude upon daily life even when he did not wish for them to occur. He experienced persistent doubts, attempted to undo or avert imagined consequences, and became absorbed in complicated resolutions and prohibitions. These details are historically salient because the thoughts' emotional force was not equivalent to intention. An intrusive image about harm is not, by itself, evidence that the person desires or is likely to commit harm. The published case needs to be read as a report of suffering and effortful self-control, not as a confession of the feared acts. Freud, 1909.

Freud described the patient's fears and countermeasures as obsessional phenomena, assigning them to his category Zwangsneurose. His conceptual vocabulary included obsessional ideas, compulsive impulses, prohibitions, doubt, and protective acts. These words anticipated some phenomena modern clinicians recognize but did not constitute a standardized contemporary diagnosis. The account does not contain a modern structured diagnostic interview, validated severity scale, or independently collected functional-outcome measurements.

The rat-punishment episode

During military maneuvers, a fellow officer described an extraordinarily cruel punishment involving rats. The description shocked the patient and became attached to fears that comparable suffering might befall his father and the woman he loved. The content was disturbing because it recruited existing fears, emotional attachments, and a subjective sense that thinking or behaving incorrectly could bring catastrophe. Freud interpreted the disproportionate force of the episode through unconscious ambivalence, punishment fantasies, and symbolic association. Freud, 1909; Library of Congress.

The imagery alone did not explain the clinical phenomenon. More important was the way a narrated threat became embedded in a cycle of alarm and attempted neutralization. Once the patient became convinced that the possibility required a special action or prohibition, ordinary uncertainty acquired a coercive quality. He could recognize an element of irrationality yet still feel compelled to obey the rule. In today's descriptive vocabulary, this resembles the interaction of intrusive fears, distress, perceived responsibility, and compulsive neutralizing actions. That resemblance is interpretive comparison, not proof of a retrospective OCD diagnosis.

The debt and repayment dilemma

A second key episode involved a small sum connected to replacement spectacles delivered during maneuvers. The patient was told to repay an officer, but the payment information was incorrect. He became entangled in a set of intensely binding internal vows about paying the proper person in the proper sequence. The elaborate repayment arrangement was difficult to reconcile with the simple practical problem. Freud viewed this apparent excess as evidence that the money had acquired meanings far beyond its monetary value, particularly obligations toward the father and conflicts around dependence, guilt, and authority. Freud, 1909.

This episode offers a useful descriptive distinction. Repaying money is an ordinary ethical obligation. A rigid internal demand whose conditions are impossible to fulfill, accompanied by acute fear and repeated attempts to repair the imagined consequences, constitutes a different psychological situation. Freud's reading proposed a hidden symbolic logic behind the ritual. A contemporary functional reading would attend to what the action temporarily relieved, how certainty was sought, and how its repeated performance may have perpetuated distress. These are analytical lenses applied to a historical narrative, not observed experimental mechanisms in this patient.

Doubt, indecision, and impaired ordinary life

The reported difficulties extended beyond the most dramatic scenes. The patient struggled to complete decisions, pursued reassurance or impossible guarantees, and described thoughts that displaced attention from his professional and personal obligations. Freud's interest in obsessive doubt centered on the paradox of a person who could reason precisely about many matters yet remained trapped by particular questions that felt inexhaustible. The clinical relevance lies in the cost to time, relationships, independence, and the ability to act despite uncertainty. Freud, 1909.

Freud's theory of obsessional neurosis in the case

Love, hostility, and ambivalence

Freud's central hypothesis was that a close attachment could contain affection and hostility in conflict. The patient openly loved his father and the woman to whom he was attached; Freud inferred hostile wishes and guilt that had become difficult to acknowledge. Obsessional fears and rituals were then interpreted as indirect expressions of, and defenses against, the conflict. The proposal was clinically consequential for Freud because it treated an apparently senseless symptom as meaningful within a person's emotional history. Freud, 1909.

Ambivalence itself is a plausible part of ordinary human attachment. The much stronger inference is that this specific patient's fears resulted from repressed hostility in the particular causal chain Freud reconstructed. The case records the analyst's interpretation; it does not independently validate the proposed latent wish. Anger, guilt, attachment, and grief can coexist without causing obsessional symptoms in the Freudian manner. Accordingly, ambivalence in the case is a historically important explanatory hypothesis whose clinical validity needs evidence beyond one analyst's narrative.

Repression, displacement, and compromise

Freud proposed that unacceptable impulses could be kept out of conscious recognition and return in altered form. In his reading, a feared punishment, a debt, a command, or an ordinary act could become a substitute arena for an emotionally charged conflict. Displacement moved affect onto less obvious objects; a compromise symptom both expressed an impulse and protected against it. The case exemplifies Freud's effort to describe symptoms as intelligible psychological formations rather than random mental events. Freud, 1909.

The explanatory risk emerges when multiple different observations can always be fitted to the same inferred conflict after the fact. A scientifically adequate causal explanation requires independent measurement, competing predictions, and criteria for disconfirmation. The Rat Man report supplies associations and clinical judgments, not a controlled test of repression or displacement. Contemporary findings about implicit processing or motivated cognition cannot simply be substituted for Freud's particular theory of repressed sexual and aggressive wishes.

Omnipotence of thoughts and magical responsibility

Freud emphasized the patient's tendency to attach extraordinary consequences to mental events and internal formulas. Thoughts could appear to carry causal power, so that merely imagining harm seemed to create a duty to prevent it. The phrase 'omnipotence of thoughts' identifies Freud's theory of why symbolic mental acts were treated as materially consequential. In modern cognitive accounts of OCD, related phenomena include thought-action fusion, inflated responsibility, overestimation of threat, and intolerance of uncertainty. These modern constructs are defined and studied in different research frameworks, and conceptual overlap must not be mistaken for theory equivalence. Freud, 1909; NICE OCD guideline.

A psychological formulation asks what a particular thought means to the person, which response it elicits, and how that response changes short-term anxiety and future susceptibility. One can conduct that formulation without assuming the historical system of libidinal development. Freud's case is valuable partly because it preserves detailed examples that later investigators could describe using more directly testable constructs.

Rats, language, money, and symbolic overdetermination

Freud linked the rat imagery to a network of associations involving money, installment payments, debts, sexuality, reproduction, bodily fears, and family relationships. His attention to German sound associations, including Ratten and Raten, illustrates a distinctive technique: words were taken as routes through which apparently separate experiences could become psychically connected. Freud described symptoms as overdetermined, meaning that a single visible element could simultaneously participate in several inferred meanings. Freud's German text.

Linguistic associations show how the analyst constructed an interpretation. They do not independently establish the existence of each inferred unconscious link. Wordplay is especially sensitive to the patient's language, the order in which questions were asked, translation, and the analyst's selection of salient details. A modern historical analysis should preserve the original German terms while explaining the logic in English; a literal English translation alone loses some of the evidentiary problem.

Childhood recollections and the father

The patient discussed childhood experiences involving fear, aggression, sexuality, discipline, family ties, and loss. Freud organized some of these recollections around an early conflict with paternal authority. He understood later obsessive guilt as a transformed continuation of these early conflicts. The discussion is historically important for the emergence of psychoanalytic developmental inference, but childhood causation is difficult to establish from adult recollections elicited within a treatment that already favors a particular theory. A recollection may be sincere and important without functioning as a verified cause of a later disorder.

What Freud actually did in treatment

Free association and the analyst's questions

Freud asked the patient to communicate whatever came to mind, including thoughts that seemed irrelevant, shameful, or bizarre. He paid attention to sequences of associations, contradictions, slips, dreams, emotional reactions, and the recurrence of topics. His method aimed to reveal a meaningful network that the patient could gradually recognize. Unlike a controlled clinical trial, the interaction was open-ended and highly dependent on the analyst's participation. Freud, 1909; Library of Congress.

The surviving process notes show an active analyst, not a purely passive recorder. Freud sometimes supplied interpretations, pursued lines of inquiry, and organized disparate material under theoretical themes. The historical claim that psychoanalytic treatment was an unrestricted stream of patient-generated data therefore needs qualification: the analyst's choices affected the record. The participant's responses in turn affected Freud's thinking. Later comparative scholarship treats this two-person interaction as essential to understanding the case. Künstlicher, 2009.

Interpretation and working with resistance

In the Freudian model, symptoms could protect against knowledge felt to be threatening. Hesitation, avoidance, objections, and the abrupt departure from certain topics might therefore be interpreted as resistance. Freud attempted to make such defenses explicit and to connect recurring fears with personal history. This position generated a lasting clinical vocabulary, but it also creates an asymmetry: disagreement with the analyst's hypothesis may be taken as evidence supporting that hypothesis. A defensible modern reading treats disagreement, uncertainty, and patient autonomy as independent information, not automatic confirmations of repression.

Interpretation in this case included careful attention to sequences of feeling and memory and stronger conjectures about unconscious wishes. These two activities should be distinguished. Eliciting and clarifying a person's reported experience can be valuable even when a particular hidden causal interpretation remains unverified. Freud's method is best evaluated through its observable procedures and its interpretive claims separately.

Transference, authority, and emotion in the consultation

Freud attended to the way attachment, suspicion, fear, dependency, and hostility could be directed toward the analyst. He understood such emotional changes as transference: earlier relational patterns became active within the treatment relationship. The Rat Man notes are a major source for understanding how the early analyst-patient encounter could itself become part of the explanatory narrative. Later scholarship has revisited the analyst's position of authority and the possibility that his expectations shaped both the interaction and its literary representation. Mahony, 1986; Künstlicher, 2009.

An important ethical implication follows. The patient's agreement with an interpretation cannot alone demonstrate its accuracy. Power, hope for relief, respect for the clinician, and ordinary interpersonal influence can affect agreement. The case invites study of transference and therapeutic rapport while also demanding safeguards against suggestion and confirmatory reasoning.

Published narrative versus process notes

How case writing creates a clinical argument

A published case history converts many hours of conversation into a beginning, sequence of pivotal episodes, explanatory turning points, and ending. This narrative form helps readers follow an otherwise tangled clinical history, but it can also conceal uncertainty. Details recorded in chronological notes may appear in a different order in a retrospective paper; minor events can disappear; the analyst's evolving hypotheses can appear more settled than they originally were. The surviving Rat Man materials make this editorial transformation especially visible. Library of Congress; Mahony, 1986.

Freud's 1909 article has enduring value precisely because it is a detailed primary document from a formative clinical school. Its argument must still be read as the argument of a historically situated author. In this sense the case is simultaneously evidence about the patient's reported experiences, Freud's clinical technique, and the construction of psychoanalytic authority.

Discrepancies and competing interpretations

Researchers who compare the printed history with the process notes have identified changes in emphasis and possible omissions. Mahony's detailed reconstruction questions the published assessment of technique and outcome. A later article by Annie Atura argues that explicitly Jewish cultural material is treated differently across the preserved notes and printed account; this is one scholarly interpretation of those differences, not a settled finding about Freud's unconscious motives. Mahony, 1986; Atura, 2017.

Other readings bring different questions to the text. Marvin Osman reinterpreted the case through later developmental psychoanalysis and mourning, while Marie Kolkenbrock examined how the case constructs gender and masculinity in its literary and historical context. These approaches demonstrate that a single richly narrated historical case can support multiple conceptual redescriptions. Their coexistence does not establish that all are equally empirically supported. Osman, 2009; Kolkenbrock, 2026.

Anonymity, retrospective identification, and source ethics

Freud's public pseudonyms were intended to limit direct identification, yet later scholarship has connected clinical aliases to individual patients. Researchers should therefore use the patient's historical identity with restraint and distinguish documented facts from intimate narrative details selected for publication. The ability to reconstruct a legal name does not automatically confer consent for new speculative diagnoses or sexual and family claims. The ethical object is a deceased person who was also a patient, not merely a character in the intellectual history of a famous theorist.

Was the Rat Man cured?

Freud represented the course favorably and later reiterated that the case had been successfully treated. Historians have disputed aspects of the implied duration, completeness of the outcome, and the weight of supporting evidence. The surviving material does not provide a standardized baseline, blinded outcome assessor, clearly specified change criteria, or systematic long-term follow-up. Thus the careful conclusion is that Freud reported improvement and cure, while independent confirmation of durable recovery remains limited. Library of Congress; Mahony, 1986.

The patient's later life and early death cannot be used to calculate psychotherapy efficacy from this case. Historical records reveal neither the counterfactual course without treatment nor a controlled comparison with alternative interventions. Improvement during treatment may be meaningful while remaining causally ambiguous. One historical case also cannot establish that a general theory of symptom formation is true simply because a patient reportedly improved.

Obsessional neurosis and modern OCD: continuity and limits

A historical syndrome is not a current diagnosis

Freud's obsessional neurosis referred to a broad theoretical and clinical construct, organized around psychic conflict, defensive processes, and particular symptom patterns. Contemporary obsessive-compulsive disorder is a diagnostic category defined through current criteria that assess obsessions and/or compulsions, distress, time burden or impairment, exclusions, and differential diagnosis. Historically reported symptoms in the Rat Man resemble some features now investigated under OCD, but a modern diagnosis cannot be reliably assigned to Lanzer from Freud's case history alone. NICE guidance.

A useful cross-century comparison concerns the experience of unwanted intrusive thoughts, the attempt to neutralize them, and the growth of elaborate rituals or avoidance. The exact content of a feared catastrophe may vary across people and periods. What matters diagnostically today is the pattern of symptoms, their impact, and the clinical assessment of alternative explanations. Freud's terminology also carried assumptions about sexual development and family conflict that are not part of contemporary OCD diagnostic criteria.

Cognitive and learning-based formulations

Modern models examine the significance assigned to intrusions, responsibility beliefs, compulsive neutralization, avoidance, threat learning, and uncertainty. An intrusive thought can become especially distressing when treated as morally dangerous or as evidence that action is urgently required. A ritual may briefly reduce anxiety and thereby strengthen the habit of ritualizing when similar distress returns. This functional perspective is relevant to the repayment and protective-vow episodes because it examines the relationship between thought, fear, response, and short-term relief. The available historical case was not collected to test that account, so this remains a retrospective formulation rather than a demonstrated mechanism. NICE OCD treatment guidance; International OCD Foundation.

These models do not render a patient's family relationships or history irrelevant. They locate causal and maintaining hypotheses within frameworks that can be operationalized, compared, and tested. Historical context remains necessary to interpret why a particular thought or interpersonal theme became charged with meaning. The clinical problem is to distinguish plausible meaning from established cause.

Evidence-based treatment in the present

For people currently living with OCD, clinical guidance identifies cognitive behavioral therapy that includes exposure and response prevention as a principal evidence-based psychological treatment, with medication options including selective serotonin reuptake inhibitors. The type and intensity of treatment depend on severity, preference, previous response, and clinical assessment. This statement concerns contemporary care, not a prescription derived from Freud's case. NICE CG31; International OCD Foundation treatment guide.

A systematic review of randomized trials reported benefits of CBT with exposure and response prevention for OCD but also emphasized comparator choice, risk of bias, and researcher allegiance as important limitations. A larger 2025 collection of CBT meta-analyses found significant benefits across several conditions, including OCD. These findings support careful evidence-based treatment planning without establishing that the unconscious meanings Freud proposed for the Rat Man were correct. ERP review; JAMA Psychiatry meta-analyses.

What modern psychodynamic research can and cannot tell us

Some modern psychodynamic treatments have outcome evidence in particular clinical conditions, and research on therapeutic alliance, affect, interpersonal patterns, and mental representation continues across theoretical traditions. These developments cannot be transported backward to validate the specific mechanisms or clinical success of the Rat Man's treatment. A treatment school, a modern intervention package, and a 1907 clinical reconstruction are different evidentiary objects. For OCD specifically, treatment recommendations should be grounded in contemporary disorder-specific evidence rather than historical prestige.

Scientific and methodological appraisal

Established historical facts

The original paper was published in 1909; the treatment began in 1907; Freud used the case to develop a theory of obsessional neurosis; preserved notes and a fair-copy manuscript exist; and the text influenced the subsequent clinical and theoretical history of psychoanalysis. These propositions are supported by bibliographic and archival records. Freud Edition; Library of Congress.

Limited clinical observations

The patient's reported intrusive thoughts, rituals, doubts, distress, and difficulties are directly important but remain filtered through Freud's records. Their precise frequency, severity, temporal course, and relation to other conditions cannot be established to modern research standards. The existence of clinical descriptions supports phenomenological comparison, not quantified diagnostic confidence.

Contested explanatory inferences

The causal primacy of repressed hostility, the specific sexual meanings attributed to symbols, and the claim of a uniquely decipherable unconscious network are theoretical interpretations. Different analysts have proposed competing explanations from the same archive. These differences reveal a genuine limitation in single-case interpretation: without independent tests, an elegant narrative can remain empirically underdetermined. Künstlicher, 2009; Osman, 2009.

Established modern evidence belongs to modern studies

Contemporary OCD research supports the effectiveness of recognized interventions across study populations, while evidence quality varies and outcomes are heterogeneous. This is an evidence claim about present-day treatment trials. It must be kept distinct from the contested efficacy of Freud's historical intervention and from the validity of his symbolism. ERP randomized-trial meta-analysis; NICE.

Legacy in psychology and the history of clinical writing

The Rat Man case helped make obsessional symptoms a central subject of depth psychology. Its descriptions of intrusive fear, moral responsibility, affective contradiction, repetitive acts, and the sometimes extraordinary personal significance of everyday obligations remain historically compelling. It also exemplifies the early psychoanalytic conviction that symptoms can be interpreted through the interaction of memory, relationship, desire, and language. The case influenced later discussions of ambivalence, undoing, transference, and the narrativization of illness.

Its further legacy is methodological. The coexistence of a published narrative and private notes gives scholars a rare opportunity to examine how clinical records become authoritative stories. The case can be studied as a clinical document, a text in the history of medicine, a theory-building exercise, and a literary construction. Each reading asks a different question and requires the appropriate evidence. The most productive contemporary use is to preserve the descriptive richness of the case while making the inferential steps explicit and open to criticism.

Questions about the Rat Man case

Who was the Rat Man?

The name refers to Freud's anonymized patient in his 1909 study, widely identified in subsequent historical scholarship as Ernst Lanzer. He consulted Freud in 1907 because of severe obsessional fears, doubts, and compulsive patterns. The label refers to a distressing rat-related obsession described during treatment. Library of Congress.

Why did rats become so important in the analysis?

A frightening account heard during military service became linked to feared harm to loved ones. Freud then traced a series of verbal and symbolic associations connecting the rat imagery with money, debts, family attachments, bodily fears, and sexuality. The reported associations are part of the historical record; the inferred unconscious network is Freud's interpretation. Freud, 1909.

Is the Rat Man a case of OCD?

The account describes phenomena resembling contemporary obsessions and compulsions. It does not provide enough standardized clinical information for a confident retrospective diagnosis using present-day criteria. Freud's category was obsessional neurosis, a historically specific conceptualization. NICE.

Did Freud prove that obsessional symptoms are caused by repressed hostility?

He proposed that explanation within a single interpreted clinical narrative. The surviving evidence documents a hypothesis and a historical therapeutic encounter. Establishing a general causal theory would require independent and comparative evidence that this case does not supply.

What makes this case unusually valuable to historians?

Unlike many early psychoanalytic histories, the Rat Man case has surviving process notes that can be compared with the polished publication. That comparison exposes how chronology, interpretation, omissions, and clinical authority interact when a case is written for a scientific audience. Freud Edition; Library of Congress.

What can readers learn from the case today?

They can examine how intrusive thoughts, fear, doubt, attachment, and attempted neutralization were understood at a decisive point in psychological history. The case also teaches the importance of source comparison, patient-centered ethics, and distinguishing observation from interpretation. Current OCD care should rely on contemporary assessment and evidence-based guidelines.

Related Articles

Sigmund Freud — The comprehensive history of Freud's life, works, psychoanalytic concepts, intellectual controversies, and scientific legacy.

Freud's Obsessional Neurosis: Symptoms, Conflict, and the Path to Modern OCD — The broader theoretical vocabulary and historical transition from obsessional neurosis to present-day OCD concepts.

Sigmund Freud's Concepts of Transference and Resistance — The clinical and theoretical development of two concepts central to Freud's treatment technique.

References

Atura, A. (2017). Unpleasant business: Rat, Jew, payment, and covenant in Freud's Rat Man. Journal of the American Psychoanalytic Association, 65(2), 173–193. https://doi.org/10.1177/0003065117690513

Cuijpers, P., Harrer, M., Miguel, C., et al. (2025). Cognitive behavior therapy for mental disorders in adults: A unified series of meta-analyses. JAMA Psychiatry, 82(6), 563–571. https://doi.org/10.1001/jamapsychiatry.2025.0482

Freud, S. (1909). Bemerkungen über einen Fall von Zwangsneurose. Jahrbuch für psychoanalytische und psychopathologische Forschungen, 1, 357–421. Original publication and edition history: Freud Edition.

Freud, S. (1907–1908). Originalnotizen zu einem Fall von Zwangsneurose (Rat Man process notes). Sigmund Freud Papers, Library of Congress. Freud Edition manuscript record.

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Künstlicher, R. (2009). The conflicting forces of Freud's clinical situation: Looking at the evolving method in the case of the Rat Man. The Scandinavian Psychoanalytic Review, 32(2), 116–124. https://doi.org/10.1080/01062301.2009.10592654

Library of Congress. (n.d.). Sigmund Freud: Conflict and Culture — The Individual: Therapy. Institutional archival exhibition.

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National Institute for Health and Care Excellence. (2005, with updates). Obsessive-compulsive disorder and body dysmorphic disorder: Treatment (CG31). Official recommendations.

Osman, M. P. (2009). Freud's Rat Man from the perspective of an early-life variant of the Oedipus complex. The Psychoanalytic Quarterly, 78(3), 765–790. https://doi.org/10.1002/j.2167-4086.2009.tb00412.x

Reid, J. E., Laws, K. R., Drummond, L., et al. (2021). Cognitive behavioural therapy with exposure and response prevention in the treatment of obsessive-compulsive disorder: A systematic review and meta-analysis of randomised controlled trials. Comprehensive Psychiatry, 106, 152223. https://doi.org/10.1016/j.comppsych.2021.152223