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Formal thought disorder (FTD) assessment in real-world psychiatric practice is in trouble. If you work in the NHS, you will have seen it: the words “No formal thought disorder” written in a clinical note, with no accompanying evidence that any such assessment actually took place. No verbatim speech. No description of the flow of thought. No record of subjective phenomena. Just a checkbox.

Non-psychiatrists who are knowledgeable about the TALD can use it freely. They are not diagnosing. They would be safe in providing evidence that can work towards a diagnosis. There are two key references: (PDF) A rating scale for the assessment of objective and subjective formal Thought and Language Disorder (TALD) [1] and the TALD Manual [2].

The method described here is one I use in my own practice as a consultant forensic psychiatrist. It does not require the clinician to have memorised the TALD manual before starting. It does not require a research-grade 50-minute interview followed by systematic rating, though that is what the TALD was validated for [1]. What it requires is a willingness to capture what the patient actually says, to separate the doing from the analysing, and to write down something more useful than the corner-cutting, “No FTD.”

I will refer to the TALD where its definitions and factor structure clarify what is being discussed, because the TALD is the most comprehensive, nosologically open FTD instrument currently available, with good psychometric properties and a four-factor structure that distinguishes objective from subjective and positive from negative FTD dimensions [1]. But this article is method, not manual.

This article is not a glossary of FTD definitions. For that, readers are directed to the more encyclopaedic reference article on this site [See Formal Thought Disorder 2025], which covers all thirty TALD items in detail, with clinical scenarios and assessment pitfalls. Nor is this article a comprehensive differential diagnosis guide. The present article is about something more basic, and in some ways more urgent: how to do FTD assessment under real NHS conditions, and how to document findings.

1. The Problem with “No Formal Thought Disorder”

1.1 What “No FTD” Usually Means

There is a golden rule in clinical documentation: if it is not properly documented, it did not happen. When a clinician writes “No formal thought disorder” without recording any of the speech they base that judgement on, the entry is not a clinical finding. It is a placeholder.

I have reviewed clinical records across multiple NHS trusts over more than a decade, and I can state with confidence that in the majority of cases, “No FTD” means no FTD assessment was actually performed. The clinician may have formed a general impression that the patient was “making sense” or “not obviously thought-disordered.” They may have been too rushed to write more. They may not know what FTD looks like. Whatever the reason, the result is the same: the clinical record contains no usable information about the structure or flow of the patient’s thinking, and a future clinician reviewing those notes has no way of knowing whether FTD was absent or simply missed.

1.2 A word of caution

In “formal thought disorder,” the word “formal” is an adjective derived from form — not from “formality” in the sense of official procedure. It refers to the structure, organisation, flow, and coherence of thinking, as distinct from the content of thought (what the person thinks about). This usage descends directly from the German psychopathological tradition — Bleuler’s “formale Denkstörungen” — where “formal” has always meant “pertaining to the form of thought“

The TALD manual is built entirely on this distinction. Objective items such as derailment, crosstalk, circumstantiality, and pressured speech describe observable disturbances in the form of speech output [2]. Subjective items such as inhibited thinking, poverty of thought, and pressure/rush of thoughts describe the patient’s internal experience of how their thinking is structured and paced. None of these address content. The scale was designed to assess “both objectively observable and subjectively reported dysfunctions in language and thinking” — dysfunctions of form, not of content.

The counterpart to formal thought disorder is disorder of thought content — delusions, obsessions, overvalued ideas. The TALD validation study made this separation explicit by design: the TALD assesses FTD phenomena alongside but distinct from content-based instruments such as the SAPS (which rates delusions and hallucinations) and the SANS (which rates negative symptoms including alogia).

A clinician who doesn’t know the etymology might reason as follows:

“I didn’t do a formal assessment of thought disorder — I didn’t use a structured instrument, I didn’t document verbatim speech, I didn’t systematically probe subjective phenomena. So when I write ‘No formal thought disorder,’ I’m not saying there’s no thought disorder. I’m saying I didn’t detect one on formal testing. If there was one present but not formally elicited, my statement is still true.“

This reasoning is misguided, but it’s not obviously wrong to someone who has never been taught what “formal” means in this context. It i s analogous to someone hearing “formal logic” and thinking it means “logic done in a suit” rather than “logic concerned with the form of arguments.“

1.3 Why Live FTD Assessment Fails

The standard approach to FTD assessment — identify phenomena in real time, during the interview, while also maintaining rapport, tracking content, assessing risk, and formulating a diagnosis — is cognitively unrealistic. It asks the clinician to do too many things at once, and the result is that subtle FTD is systematically missed.

The TALD manual itself is clear about what a proper FTD assessment involves: the patient must be given “sufficient time to speak freely for several minutes,” and subjective phenomena — which the patient will not spontaneously report — “must be asked about directly” [2]. The scale distinguishes between objective phenomena, rated solely on the basis of what is observed during the interview, and subjective phenomena, rated for the preceding 24 hours [2]. This means the clinician must simultaneously attend to the patient’s speech form, probe their internal experience, and maintain a human connection.

Even experienced clinicians find this demanding. For trainees, for staff under service pressures, and for anyone seeing a new patient in a time-limited setting, the cognitive load exceeds what most people can manage. The predictable outcome is that the clinician defaults to listening to content — the delusions, the hallucinations, the risk-relevant disclosures — and lets the form of thought go unexamined. And because they have not captured any verbatim speech, they have nothing to analyse afterwards. The assessment opportunity is lost.

1.4 The Normalisation Trap

There is a subtler problem too, one I have encountered repeatedly in my own practice. Staff who work with a patient over months or years can become habituated to their FTD. When a patient who has been thought-disordered for a decade speaks, the unfamiliar clinician hears disorganisation; the familiar clinician hears “that’s just how he is.”

Take the example of a patient in prison, well known the team. He was floridly thought-disordered — rapid rate, convoluted ideas, impossible to follow. After he left the room, I commented on how mentally unwell he was. The two staff who had known him for years responded, “That’s how he normally presents in the community.” When I explained the severity of his FTD, they were unmoved: “That’s Mr X. That’s how he is” [See previous article.]

This is the normalisation of pathology. It is not malice. It is a cognitive bias — the tendency to treat the familiar as normal. In the previously captioned case, it meant that years of florid FTD had been dismissed as personality, and the patient’s treatment had been shaped by that dismissal. A medium-secure team had even stopped his antipsychotic medication because “stopping it made no difference” — failing to recognise that an ineffective medication is not the same as an absent illness.

Verbatim documentation protects against this bias. When the patient’s disordered speech is on the page, it cannot be normalised away.

2. A Different Approach: Separate Data Collection from Analysis

2.1 Capture First, Analyse Later

The method I use in my own practice rests on a single, simple principle: do not try to identify FTD in real time. Instead, capture what the patient says verbatim during the interview, and analyse it afterwards.

This separation of data collection from data analysis is standard practice in many clinical disciplines. A radiologist does not interpret a CT scan while acquiring it. A pathologist does not read a biopsy slide while the specimen is being cut. In psychiatry, however, we have inherited a tradition that expects the clinician to assess FTD live — to listen, maintain rapport, track content, manage risk, and identify subtle disturbances in the form and flow of thought, all simultaneously. The TALD manual itself requires that the interviewer attend to both objective phenomena (observable during the interview) and subjective phenomena (reported by the patient for the preceding 24 hours), and that subjective phenomena be explored through direct questioning [2]. This is a cognitively demanding task that few clinicians, however experienced, can perform reliably under service pressures.

The alternative is straightforward. During the interview, I type what the patient says. Not a summary. Not a paraphrase. Their actual words, as close to verbatim as I can manage. If I am conducting a Mental Health Act assessment or a prison visit where typing is not possible, I take detailed handwritten notes and read key passages back to the patient to confirm accuracy. The goal is to preserve the raw speech data — the derailments, the tangential drifts, the perseverative returns, the crosstalk responses — so that they can be examined later, at a desk, with the time and mental space to do the analysis properly.

The TALD was validated for use in a 50-minute interview, with rating conducted immediately afterwards [1]. That is research-level rigour, and in a busy NHS setting most clinicians will not have a full 50 minutes plus another 90 minutes of thinking time. But the principle of separating interview from analysis remains valid even when the interview is shorter. Capturing verbatim speech demands more of concentration and typing speed (or speech recognition where permissible). It yields actual clinical data rather than a vague impression and is immeasurably more valuable.

2.2 Engaging the Patient as Co-Editor

There is a further advantage to this method, one I discovered by through years of practise. When the patient can see what I’m typing — either on a screen turned toward them, or when read back what I’ve have handwritten — the dynamic of the interview changes. The patient becomes a collaborator in the accuracy of the record.

Most patients with psychotic or mood disorders are acutely aware that they are not always understood. They have learned, often through painful experience, that clinicians mishear them, misinterpret them, or simply do not listen. When they see their own words appearing on the screen, something shifts. They may correct a word: “No, I didn’t say ‘worried,’ I said ‘weary.'” They may confirm that a particular phrase is accurate. They may, without prompting, expand on a point because they can see that the record is incomplete.

This is not merely a rapport-building technique, though it does build rapport. It is a method of improving the quality of the clinical data. The TALD manual is explicit that a subjective phenomenon may not be judged present simply because the patient affirms it — the examiner must obtain a precise description [2]. When the patient sees their own words and corrects or confirms them, that process of mutual clarification is built into the method.

And there is a subtler benefit. In more demanding settings — a prison, a police station, a Mental Health Act assessment where the patient does not want to be detained — the visible act of accurate documentation signals something important: “I am listening. I am recording what you actually say. I am not putting words in your mouth.” This does not always win the patient over, but it establishes a baseline of procedural fairness that is harder to achieve when the clinician’s notes are invisible.

2.3 What This Requires

The method requires three things.

First, the ability to type quickly or write efficiently. I type fast. That is a skill I developed over years, and it makes verbatim documentation feasible. A clinician who does not type fast can still use the method by writing key phrases and speech segments by hand, then reading them back to confirm. The important thing is that the form of speech is captured, not that every single word is transcribed. Even capturing 70% of what a patient says, accurately, is vastly more informative than capturing a mere 10%.

Second, a setup that allows the patient to see or hear what is being written. In clinic, this means positioning the screen so the patient can view it, or using a tablet that can be turned. In settings where handwritten notes are necessary, it means reading back key passages: “Let me just check I’ve got this right — you said…” The read-back serves the dual purpose of confirming accuracy and demonstrating attention.

Third, time. This method cannot be done in a 10-minute rushed assessment. The TALD validation study used a 50-minute interview, and while that may not always be achievable in the NHS, something close to it — 30 to 45 minutes — is necessary for FTD to emerge [1]. The TALD manual states that the patient should be given “sufficient time to speak freely for several minutes” and that subjective phenomena must be explored in detail [2]. Thought disorder does not declare itself in monosyllables. It needs space.

3. From Raw Notes to FTD Identification

3.1 Mining the documentation

The interview is over. I have a page — or several pages — of verbatim or near-verbatim speech and elements of Mental State Examination. Now the real work begins.

I go back through my notes and look for FTD phenomena. This is a different kind of reading. I am not reading for content — the delusions, the hallucinations, the risk-relevant disclosures — though those will be relevant later when I apply ICD-11 criteria. I am reading for form. I am asking:

• Does the patient answer the question asked, or do they talk past it? (Crosstalk) [2]
• Do their ideas slip from one to another through oblique but recognisable associative links? (Derailment) [2]
• Do they eventually get back to the point, or drift away and never return? (Circumstantiality vs Tangentiality) [2]
• Do they return repeatedly to a topic that no longer fits the current context? (Perseveration) [2]
• Is the speed of speech abnormally increased, or is there an unstoppable urge to speak that resists interruption? (Pressured Speech vs Logorrhoea) [2]
• Are there words that do not exist in standard English, or substitutions of semantically related but inappropriate words, or mispronunciations? (Neologisms vs Semantic Paraphasia vs Phonemic Paraphasia) [2]
• Does the speech convey little information despite adequate or even excessive quantity? (Poverty of Content of Speech) [2]
• Is there a restriction in the range of content, with difficulty switching topics? (Restricted Thinking) [2]
• Does the conversation feel languid and torpid, with prolonged pauses? (Slowed Thinking) [2]
• Are replies brief, concrete, unelaborated, or monosyllabic? (Poverty of Speech) [2]

This is not a formal TALD rating. I do not assign a score of 0–4 to each of the 30 items. What I do is identify which FTD phenomena are present, at what approximate severity, and which are conspicuously absent. The verbatim notes make this possible because the speech is there on the page. I can see the derailment because I can trace the associative slippage from sentence to sentence. I can see the crosstalk because I can compare the question asked with the answer given.

The TALD manual’s differentiated phenomena are invaluable at this stage. When I see what might be circumstantiality, I check: did the patient eventually reach the goal? If yes, it is circumstantiality; if no, it is tangentiality [2]. When I see an apparent sudden stop, I distinguish between whether I observed the interruption (Rupture of Thought) or the patient reports the experience of losing the thought (Blocking) [2]. These distinctions are not academic. They change the FTD profile, and the FTD profile changes the diagnostic tilt.

3.2 Subjective Phenomena

The TALD’s most important contribution to FTD assessment is its inclusion of subjective phenomena — experiences that the patient reports but that cannot be observed [1]. The validation study demonstrated that the two subjective TALD factors (Subjective Negative, Factor II, and Subjective Positive, Factor IV) were not adequately captured by existing objective scales [1]. This means that a clinician who relies solely on observing speech will systematically miss a substantial portion of the FTD picture.

In the interview, I directly ask about subjective phenomena. The TALD manual provides example questions for each item, but the phrasings can be adjusted for each patient and situation [2]. The key is that the clinician describes the phenomenon in accessible language and explores the patient’s response in sufficient depth to be confident that the phenomenon is genuinely present. A simple “yes” is not enough.

I’d ask modified versions of the following so as not to get back ‘yes’ or ‘no’ answers:

• “Do you sometimes feel that your thinking has slowed down, or that it’s harder to think than it used to be?” (Inhibited Thinking) [2]
• “Does it seem that nothing new comes into your mind — that your thinking feels empty or unimaginative?” (Poverty of Thought) [2]
• “Do thoughts rush through your mind, lots of them, very fast, and you can’t control them?” (Pressure/Rush of Thoughts) [2]
• “Do thoughts that don’t belong to what you’re trying to think about keep intruding or distracting you?” (Thought Interference) [2]
• “Do you sometimes lose your train of thought — does a thought just stop or fade away?” (Blocking) [2]
• “Are you constantly going over the same unpleasant thoughts, the same worries, without getting anywhere?” (Rumination) [2]
• “Do you find it hard to understand what people are saying to you, or to follow conversations or TV programmes?” (Receptive Speech Dysfunction) [2]
• “Do you struggle to find the right words when you’re speaking?” (Expressive Speech Dysfunction) [2]
• “Do you feel you’ve lost the energy or initiative to think — that it takes effort just to get your thoughts going?” (Dysfunction of Thought Initiative and Intentionality) [2]

These questions take time, but they do not take as long as one might think. Most patients answer them briefly, and the clinician quickly learns which ones are relevant and which are not for a given presentation. The point is that without asking, you do not know. A patient with profound inhibited thinking and poverty of thought may produce outwardly normal speech throughout the interview. If you do not ask, you will write “No FTD” — and you will be wrong.

The TALD’s time frame for subjective phenomena is the preceding 24 hours [2]. This is a sensible clinical convention. A patient who experienced pressure/rush of thoughts the night before but is calmer during the interview should still have that experience recorded. The 24-hour window also prevents the clinician from making unreliable judgements about longer periods.

3.3 Avoiding the Normalisation Trap

The original encyclopaedic article on this site describes a striking real-world example: two experienced staff members, who had known a patient for years, dismissed florid FTD as “that’s how he normally presents” [hyperlink to original article]. A medium-secure team had stopped his antipsychotic medication because “stopping it made no difference” — failing to recognise that an ineffective medication is not the same as an absent illness. The patient’s FTD had been normalised to the point of invisibility.

This is not an isolated incident. It is a predictable consequence of how human beings process familiarity. When you see the same patient repeatedly, their speech patterns become part of your mental model of “that patient.” You stop noticing the derailments, the crosstalk, the poverty of content. You stop being surprised. And because you are not surprised, you do not document what you are seeing — or you document it in sanitised, minimising language that conveys nothing of the actual clinical picture.

The verbatim method is a partial antidote to this. When the patient’s disordered speech is on the page — when you can read back what they actually said, in their own words — it is harder to normalise. The derailment is visible. The crosstalk is visible. The poverty of content — paragraphs of speech that convey almost no information — is visible. You cannot unsee what you have documented.

4. Pattern Recognition: Diagnostic Tilt, Not Diagnostic Rules

4.1 Positive vs Negative FTD: The First Cut

Once I’ve have identified the FTD phenomena present in my verbatim notes, the next step is to step back and ask: what is the overall shape of this profile?

The single most clinically useful distinction is between positive and negative FTD. The TALD’s principal component analysis yielded four factors, but these can be grouped into two broad dimensions that map onto well-established clinical syndromes [1]:

Positive FTD (Objective Positive, Factor I, and Subjective Positive, Factor IV) involves acceleration, disorganisation, and excess. The speech is too fast, too much, or too disconnected. The patient may report thoughts racing or intruding. Phenomena include derailment, crosstalk, circumstantiality, tangentiality, pressured speech, logorrhoea, dissociation of thinking, perseveration, poverty of content of speech, rupture of thought, restricted thinking, semantic and phonemic paraphasia, manneristic speech, neologisms, pressure/rush of thoughts, and thought interference [1]. When positive FTD dominates and negative FTD is conspicuously absent, the diagnostic tilt is toward mania or acute psychosis.

Negative FTD (Objective Negative, Factor III, and Subjective Negative, Factor II) involves slowing, paucity, and emptiness. The speech is reduced in quantity or rate. The patient reports that their thinking feels empty, slowed, effortful, or obstructed. Phenomena include poverty of speech, slowed thinking, concretism, poverty of thought, inhibited thinking, rumination, blocking, dysfunction of thought initiative and intentionality, and receptive and expressive speech dysfunction [1]. When negative FTD dominates and positive FTD is absent, the diagnostic tilt is toward severe depression or negative-symptom schizophrenia.

This is the first cut. It takes seconds to make once your verbatim notes are in front of you. Does the speech show acceleration and disorganisation, or slowing and emptiness? The answer narrows the differential considerably before you have even considered the content of what was said.

The TALD validation study provides empirical support for this approach. The between-group ANOVA showed that mania patients scored highest on the Objective Positive factor, differing significantly from all other groups, while patients with depression and schizophrenia showed the highest values on the negative FTD dimensions [1]. The distinction between positive and negative FTD is not merely conceptual; it maps onto real differences between diagnostic groups.

4.2 The Weighted Constellation

Individual FTD items are not diagnostic. A single instance of derailment, a single crosstalk response, a single report of thought interference — none of these, in isolation, tells what the patient has. But when multiple phenomena from the same dimension coalesce, and when phenomena from other dimensions are conspicuously absent, the pattern provides genuine diagnostic tilt.

This is the logic of the weighted constellation. It is not a checklist where you count items and reach a threshold. It is a clinical judgement about which phenomena dominate the picture and which are missing.

The following patterns are offered as clinical heuristics, not diagnostic criteria. They are drawn from the TALD validation study’s between-group findings and from the broader psychopathological literature. A fuller discussion of each cluster, including detailed rule-outs and differentials, is available in a separate article on this site [hyperlink to cluster article].

• The High-Pressure pattern (tilt toward mania): pressured speech and logorrhoea co-occur; derailment has a rapid, flight-of-ideas quality; pressure/rush of thoughts is reported; negative FTD phenomena are absent or minimal. The TALD data confirm that mania patients scored highest on the Objective Positive factor [1].
• The Empty/Slowed pattern (tilt toward depression): slowed thinking, poverty of speech, inhibited thinking, and poverty of thought are all present; rumination is prominent; positive FTD phenomena are absent or minimal. The TALD data show that depression patients had the highest subjective mean subscale values on the negative dimensions [1].
• The Across-the-Board pattern (tilt toward schizophrenia): positive and negative FTD co-exist in the same patient — derailment alongside poverty of speech, crosstalk alongside inhibited thinking, pressure/rush of thoughts alongside poverty of thought. The TALD data show that patients with schizophrenia had elevations across multiple factors [1].
• The Organic pattern (tilt toward neurological workup): semantic paraphasia, phonemic paraphasia, receptive speech dysfunction, expressive speech dysfunction, and concretism dominate; classic psychiatric FTD items (derailment, crosstalk, pressured speech, logorrhoea) are absent or mild. These items had low prevalence in the TALD validation sample — semantic and phonemic paraphasia each occurred in only 12.4% of participants [1].

In practice, these patterns overlap. A patient may show features of more than one cluster, and the mixed picture is the rule, not the exception. The purpose of identifying a pattern is not to force the patient into a category but to clarify the diagnostic direction: given what I am seeing, where should I look next?

4.3 Organic Red Flags

Certain FTD phenomena, when they appear in a patient without a clear functional diagnosis, should prompt consideration of neurological pathology. The TALD validation paper explicitly notes the potential utility of the scale in the context of “other speech-associated impairments, e.g. in aphasia, or dementia” [1].

The following items warrant particular attention:

• Semantic paraphasia and phonemic paraphasia: each occurred in only 12.4% of the validation sample [1]. Their presence, particularly when they co-occur, is a strong signal of organic pathology — aphasia, dementia, or cerebrovascular disease. The TALD manual explicitly distinguishes these from neologisms: a neologism is a new word formation that does not correspond to lexical conventions; a semantic paraphasia is the substitution of a semantically related but inappropriate word; a phonemic paraphasia is a mispronunciation [2]. Neologisms tilt toward schizophrenia; paraphasias tilt toward organic pathology.
• Receptive speech dysfunction: difficulty understanding conversations, films, and radio programmes. When this appears in an older patient, particularly if it is progressive and not accompanied by a clear mood or psychotic disorder, neurological investigation is indicated.
• Expressive speech dysfunction without other FTD: if a patient reports difficulty finding words but shows no derailment, crosstalk, pressured speech, or other classic psychiatric FTD items, consider a primary language disorder.
• Concretism of new onset: while concretism occurs in schizophrenia and depression, its appearance in later life, particularly with behavioural disinhibition or apathy, should raise suspicion of frontal lobe pathology.
• First presentation of apparent FTD in a patient over 50: the pre-test probability of a neurodegenerative or cerebrovascular cause increases substantially with age. A thorough cognitive assessment and structural neuroimaging should be considered.

The TALD validation study has not yet been replicated in neurological populations, and the authors note that “further studies are needed to test the reliability of the scale” in these contexts [1]. The organic red flags described here are based on the known neuropsychology of language and clinical experience rather than TALD-specific validation data in neurological samples. This limitation should be borne in mind.

5. Integrating FTD with Diagnostic Criteria

5.1 FTD Provides Tilt; Content Provides Diagnosis

FTD assessment and diagnostic classification are complementary but distinct exercises. They answer different questions.

FTD tells you about the structure and flow of the patient’s thinking. It tells whether their thought processes are accelerated or slowed, disorganised or empty, and which dimensions — positive, negative, objective, subjective — are affected. From this, you derive a diagnostic tilt: the pattern of FTD points in a particular direction.

ICD-11 diagnostic criteria require the content of the patient’s experience: the presence or absence of delusions, hallucinations, mood disturbance, and their duration and impact. These criteria are the basis for diagnostic classification.

In my own practice, I keep these two exercises separate in my mind during the assessment, and I integrate them only at the end. During the interview, I am capturing verbatim speech and probing subjective phenomena — this is the FTD data. I am also exploring delusional content, hallucinatory experiences, mood, and functional impact — this is the diagnostic data. When I review my notes afterwards, I analyse the FTD first: what phenomena are present, what pattern do they form, and which direction does the pattern tilt toward? Then I apply ICD-11 criteria to the content. The FTD tilt and the ICD-11 diagnosis usually align. When they do not — when the FTD pattern suggests one direction and the content suggests another — that discrepancy itself is clinically informative and warrants exploration.

The TALD was designed with nosological openness: it is “applicable for any kind of disorder” [1]. It does not assume a diagnosis. This makes it well suited to the approach described here, where FTD assessment and diagnostic classification are kept distinct and then brought together in the final formulation.

5.2 Documenting the Tilt

The verbatim method produces a clinical record that is more transparent, more auditable, and more useful to future clinicians than “No FTD.” The question is how to document the findings in a way that is clear about what was observed, what pattern it forms, and what the limitations are.

I will write a structured form of words, adapted to the individual case:

“The following FTD phenomena were identified during the assessment: [list specific items, e.g. derailment, crosstalk, circumstantiality, poverty of content of speech, pressure/rush of thoughts]. This pattern — predominantly Objective Positive with Subjective Positive features, and an absence of negative FTD phenomena — tilts toward [direction, e.g. mania] but is not diagnostic in isolation. The patient also described [ICD-11 content criteria, e.g. grandiose delusions, decreased need for sleep, elevated mood for a period of two weeks]. Applying ICD-11 criteria, a probable diagnosis of [condition] is reached.”

This formulation does several things:

• It records what was actually observed, not a checkbox.
• It distinguishes between FTD (tilt) and diagnostic criteria (classification).
• It is transparent about the reasoning process.
• It is defensible: another clinician reviewing the notes can see the evidence and follow the logic, even if they disagree with the conclusion.

The verbatim speech itself should be preserved in the clinical record wherever possible. Even a few key passages — the most striking derailment, the clearest crosstalk response, the patient’s own description of their subjective experience — provide the raw data on which the FTD assessment is based. Future clinicians can read those passages and form their own judgement. That is what proper documentation looks like.

6. Limitations

6.1 This Is Not a Full TALD Assessment

The method described in this article captures what is present in the clinical encounter, but it does not constitute a formal TALD rating. The TALD was validated for use in a 50-minute interview followed by systematic scoring of all 30 items, with raters who had undergone three training sessions and achieved good interrater reliability (ICC = .80) [1]. The full TALD also requires the clinician to probe every subjective item systematically, using the example questions provided in the manual, and to explore each phenomenon in sufficient depth to be confident of its presence or absence [2].

What I describe here is a practical clinical method, not a research-grade assessment. It will identify the most prominent FTD phenomena — particularly the objective ones visible in verbatim speech — and it will flag the subjective phenomena that the clinician remembers to ask about. But it may miss subtle items that a systematic TALD assessment would detect, particularly the rarer phenomena (semantic paraphasia, phonemic paraphasia, neologisms, manneristic speech) and the quieter subjective experiences (dysfunction of thought initiative and intentionality, receptive speech dysfunction, expressive speech dysfunction) that are easily overlooked without a structured probe [1].

This is an acceptable trade-off in a busy clinical setting. A method that reliably identifies the dominant FTD pattern — positive vs negative, objective vs subjective — is a substantial improvement on “No FTD.” But the clinician should know what they are not doing.

6.2 It Requires a Particular Setup

The method has practical prerequisites that may not be achievable in every setting.

It requires the ability to type quickly or to write verbatim passages by hand. A clinician who types slowly or who relies on retrospective summary will not capture enough raw speech data for the method to work. In settings where neither a keyboard nor detailed handwritten notes are feasible — an emergency department during a crisis, a prison wing with no desk, a home visit — the verbatim approach may need to be adapted or substituted.

It also requires the patient to tolerate the visible act of documentation. Most patients, in my experience, adapt quickly and may even appreciate the transparency. But some will find it distracting, suspicious, or off-putting. The clinician must judge when the method helps and when it hinders.

It requires time. The TALD was validated in a 50-minute interview [1]. While the verbatim method does not need the full 50 minutes to yield useful results, it cannot be done in a rushed 10-minute assessment. FTD phenomena — particularly the subjective ones — require space to emerge, and the clinician requires space to probe them. In a service environment where assessments are routinely compressed, this method will be harder to sustain.

None of these limitations are reasons not to use the method. Most can be managed with preparation and pragmatism. But they are reasons to be realistic about when the method is feasible and when a modified approach is needed.

6.3 FTD Is Not Diagnostic

I have said this throughout the article, and it bears repeating here. FTD is not diagnostic. No single FTD phenomenon, and no pattern of phenomena, is pathognomonic for any psychiatric or neurological condition. The TALD validation study found distinct group-level “fingerprints” across diagnoses, but these were differences of degree, not of kind, and they do not permit reliable diagnosis at the level of the individual patient [1].

The verbatim method improves FTD detection and documentation. It provides diagnostic tilt — a reasoned direction for further assessment — but it does not provide a diagnosis. That must come from the integration of FTD findings with ICD-11 content criteria, the broader clinical picture, the history, the collateral information, and, where indicated, investigation.

A clinician who uses this method and then writes “Derailment, crosstalk, and poverty of content of speech were identified; therefore the patient has schizophrenia” has misunderstood the method. The correct formulation is something closer to: “Derailment, crosstalk, and poverty of content of speech were identified in the verbatim record, alongside pressure/rush of thoughts reported by the patient. This pattern tilts toward schizophrenia. When combined with the presence of persecutory delusions and third-person auditory hallucinations of more than one month’s duration, ICD-11 criteria for schizophrenia are met.”

The difference between those two statements is the difference between pattern recognition and diagnostic overreach. The method described here is a tool for the former, not a licence for the latter.

Conclusion

The Diagnostic Nuggets That Form-Focused Listening Reveals

This article has described a method — verbatim documentation, retrospective analysis, pattern recognition — for assessing formal thought disorder under real NHS conditions. The method works. But the deeper question is why it matters.

It matters because form-focused listening yields diagnostic information that content-focused listening misses. A patient who describes persecutory delusions in a derailed, crosstalk-heavy, pressured manner is giving two layers of information. The content — the delusion — goes to ICD-11 diagnostic criteria. The form — the derailment, the crosstalk, the pressured speech — goes to pattern recognition and diagnostic tilt. If you only hear the content, you have half the picture. If you hear both, you have a formulation that is more robust, more defensible, and more useful to the next clinician who reads your notes.

The TALD validation study demonstrated that FTD is multidimensional, with four distinct factors — Objective Positive, Subjective Negative, Objective Negative, and Subjective Positive — that cut across diagnostic boundaries [1]. The subjective factors, in particular, were not captured by existing objective scales and represent a dimension of FTD that is uniquely assessed by the TALD. A clinician who does not ask about the patient’s internal experience of their own thinking — whether it feels empty, slowed, accelerated, intruded upon, or effortful — is systematically missing a substantial portion of the FTD picture.

The converse is equally true. A clinician who is poorly trained in form-focused assessment, or who is operating under time pressure that precludes proper attention to the structure and flow of speech, will miss important psychopathology. This is not speculation. It is the predictable consequence of asking clinicians to do cognitive work that exceeds what most people can manage — simultaneously maintaining rapport, tracking content, assessing risk, and identifying subtle disturbances in the form of thought — without providing them with adequate time, training, or supervision. The result, documented across NHS trusts over more than a decade, is that “No FTD” has become a checkbox rather than a clinical finding. The clinical record is incomplete. The opportunity to capture diagnostic information is lost. And the patient’s care is compromised.

The verbatim method described in this article is a partial remedy. It separates data collection from data analysis, reducing the cognitive load during the interview. It preserves raw speech data for retrospective examination, making it possible to identify FTD phenomena that were missed in real time. And it produces documentation that is transparent, auditable, and useful to future clinicians — a record of what was actually said, not a placeholder that could mean anything or nothing.

Who Is Trained to See It — and Who Is Not

There is a further issue, one that is rarely discussed but has significant implications for diagnostic accuracy under ICD-11.

ICD-11 CDDR 6A20 (c) includes, as a diagnostic criterion for schizophrenia, “disorganized thinking (formal thought disorder) (e.g. tangentiality and loose associations, irrelevant speech, neologisms) – when severe, the person’s speech may be so incoherent as to be incomprehensible (‘word salad’).” The parenthetical examples make explicit what is meant by “disorganized thinking”: these are technical psychopathological terms — tangentiality, loose associations (derailment in TALD terminology), irrelevant speech (crosstalk in TALD terminology), neologisms, and incoherence (dissociation of thinking in TALD terminology) [2]. Identifying these phenomena requires the assessor to distinguish form from content, to recognise specific patterns of associative slippage, and to differentiate between superficially similar phenomena — between circumstantiality and tangentiality, between neologisms and semantic paraphasia, between derailment and dissociation of thinking [2].

These are psychiatric skills. They are not generic healthcare skills.

In modern NHS practice, much assessment is multidisciplinary. A patient may be seen initially by a nurse, discussed at a team meeting, and a diagnosis formulated or reinforced without a psychiatrist ever having conducted an independent, form-focused assessment of the patient’s speech. The nurse, the social worker, the occupational therapist — all essential members of the clinical team — are trained in competencies that are central to their own disciplines: risk assessment, social need, therapeutic engagement, activities of daily living. They are not trained, and should not be expected, to identify tangentiality, to distinguish derailment from dissociation of thinking, or to recognise that a word the patient has just used is a neologism rather than a term from youth culture [2].

None of this is a criticism of non-psychiatric colleagues. It is a statement about the limits of professional training and about the risk that arises when a diagnostic criterion that requires specialist psychiatric assessment is assessed — explicitly or implicitly — by those not trained to assess it. The ICD-11 criterion for disorganised thinking is not a box that can be ticked on the basis of a general impression that the patient was “a bit muddled.” It requires the identification of specific, operationalised phenomena. If the assessing clinician cannot do that — whether because they lack the training, the time, or the supervision — the diagnostic process is compromised.

The solution is not to expect every member of the MDT to become proficient in FTD assessment. It is to ensure that a clinician who is so trained — a psychiatrist — conducts a form-focused assessment and documents the findings in sufficient detail that the basis for the diagnostic judgement is transparent. The verbatim method described in this article makes that documentation possible. It makes the FTD visible on the page, where it can be reviewed, discussed, and — if necessary — challenged. That is what proper documentation looks like. And it is the minimum standard that patients deserve.