Four levels of description #
| Level | Question | Examples of findings |
|---|---|---|
| Speech production | How are words delivered? | Amount, rate, volume, latency, articulation and prosody. |
| Thought form | How do ideas connect and reach a goal? | Circumstantiality, tangentiality, derailment and blocking. |
| Thought content | What occupies the person’s thinking? | Worry, preoccupation, obsession, delusional belief or suicidal thought. |
| Ownership and agency | How does the person experience the origin or control of thought? | Thought insertion, withdrawal or broadcasting experiences. |
Thought is inferred partly through communication; it is not directly visible. A language barrier, hearing difficulty, interpreter process or neurological speech problem can alter the sample. Establish these limits before attributing unclear communication to a psychiatric thought disorder.
Describe speech without diagnostic shortcuts #
Observe spontaneous speech and responses to questions. Record rate, amount, volume, response latency, interruptibility, rhythm, articulation and meaningful change from the person’s baseline. Pressure of speech involves driven or difficult-to-interrupt output; it is more than speaking quickly. Reduced output may reflect many contributors, including mood, cognition, fear, fatigue or limited opportunity to speak.
Compare patterns of organization #
| Pattern | Description |
|---|---|
| Circumstantiality | Excessive detail delays the answer, but the central point is eventually reached. |
| Tangentiality | The response moves away from the question and fails to reach its intended answer. |
| Flight of ideas | Rapid shifts between ideas, often through recognizable superficial associations or distraction. |
| Derailment | The links between successive ideas become weak or difficult to follow. |
| Perseveration | An earlier response or idea persists beyond its relevant context. |
| Thought blocking | An abrupt interruption is experienced as a break or loss of the train of thought. |
| Incoherence | The organization is sufficiently disrupted that meaning becomes difficult to understand. |
A pause alone is not thought blocking. Ask what happened during it. A lengthy response alone is not circumstantiality unless the relationship to the goal is clear. A single unusual phrase is insufficient to characterize the person’s overall thinking. Preserve short examples and the question that elicited them.
Explore content and its psychological function #
The same topic can appear as a realistic concern, preoccupation, depressive rumination, intrusive obsession or delusional belief. Examine how the idea arises, whether it is wanted, its conviction, flexibility, cultural context, associated response and effect on functioning. Do not label all repeated thoughts “obsessions” or all firmly held ideas “delusions.”
- Ask about worries and preoccupations in the person’s own words.
- Clarify intrusive thoughts, images or impulses and any neutralizing acts.
- Assess unusual beliefs through evidence, conviction, alternatives and behaviour.
- Explore hopelessness, self-harm or harm-related content with intention and behaviour separately.
- Distinguish thoughts reported now from those recalled from an earlier episode.
Thought ownership and agency #
Thought insertion describes an experience that thoughts have been introduced from outside and are not the person’s own. Thought withdrawal concerns thoughts experienced as removed by an external influence. Thought broadcasting concerns thoughts experienced as accessible to others in an unusual way. Clarify the exact account, because ordinary phrases such as “they put ideas in my head” may mean persuasion rather than altered ownership.
These experiences contribute to assessment but should not automatically assign a particular disorder. Consider the full syndrome, time course, mood, medical and exposure context.
A coherent account #
Separate the observed speech sample, inferred organization, reported thought content and subjective ownership. Include context and confidence. Absence of spontaneous disclosure is not evidence that a domain has been fully assessed.