Schizotypal personality: a therapist's manual

1. The programme at a glance

Indication. Schizotypal personality in adults, in outpatient settings, without an established psychotic disorder, with an identified psychiatrist in the care loop.

Reference model. An adapted cognitive behavioural therapy that borrows from cognitive therapy for attenuated psychotic experiences (Morrison et al., 2004) — normalisation, examination of interpretations, stress management, early warning signs plan — and from work on personality disorders (Beck et al., 2015; Bateman et al., 2015) — alliance, framework, social functioning. Normalisation here means presenting unusual experiences as lying on a continuum that many people share (section 4, session 4); it is never aimed at eccentricity, which the programme does not seek to correct (section 13).

Format. Treatment lasting about a year, that is, some forty sessions; this manual describes sixteen key sessions, organised in five phases, each of which may extend over two or three sessions (section 2). Sessions of 45 to 50 minutes, weekly during the first two phases, then fortnightly. Psychiatric follow-up in parallel, at a frequency set by the psychiatrist. After regular treatment, three booster sessions, at one, three and six months after the last session, and extended monitoring of early warning signs (session 16).

Targeted mechanism. Reducing the distress and impairment linked to unusual experiences by acting on how they are interpreted and on what amplifies them — stress, lack of sleep, cannabis, isolation —, reducing the social anxiety and mistrust that maintain isolation, improving social and occupational functioning, and detecting a psychotic progression early.

Phase	Session	Topic	Session output
I. Alliance	1	Welcoming and understanding	Reason formulated, experiences heard without judgement
	2	A clear framework	Goals chosen, framework written, psychiatrist identified
	3	Assessment	Psychosis ruled out, risk assessed, vulnerability factors listed
II. Understanding	4	The continuum of experiences	Experiences placed on a continuum
	5	The cycle of unusual experiences	Cycle drawn from a real episode
	6	Stress, sleep, cannabis	Plan for two vulnerability factors
III. Loosening	7	Ideas of reference	Three explanations per situation
	8	What beliefs cost	Written balance sheet for one belief
	9	Unusual perceptions	Coping strategies tried
	10	Midpoint review	Measures repeated, plan revised
IV. Relationships	11	Social anxiety and mistrust	First graded exposure
	12	Making oneself understood	Two communication situations prepared
	13	The plan	A study, work or activity goal
V. Consolidation	14	The early warning signs plan	Plan written and shared with the psychiatrist
	15	Family and those close to the patient	Joint session or information prepared
	16	Review, next steps, monitoring	Plan written, measures repeated

What sets this programme apart from the other manuals on this site. Three things. A disorder on the border between personality and psychosis, which the two classifications do not place in the same category. Beliefs that are never examined for their truth. And monitoring of the course of the disorder that is part of treatment and is carried out with the patient.

2. Before you begin

The four preliminary decisions

1. Is this a psychotic disorder? Are the ideas of reference delusions? Are the unusual perceptions hallucinations? Is thinking disorganised? Section 7.

2. Is this an at-risk mental state for psychosis? Recently emerging attenuated psychotic symptoms, that is, symptoms of low intensity that fall below the threshold for a psychotic disorder (section 6), declining functioning and a family history of psychosis in a young adult point towards a specialised early intervention service: a team that identifies and treats at-risk mental states and first psychotic episodes. Sections 7 and 9.

3. Is this autism spectrum disorder? The overlap is considerable, and the developmental history decides. Section 7.

4. Are the patient's beliefs shared by their cultural or religious group? Section 5.

What this programme does not treat

Schizophrenia, delusional disorder and the other psychotic disorders, which call for psychiatric care.

At-risk mental states for psychosis in young people, which are primarily the remit of early intervention teams, even though this manual shares many of their tools.

Autism spectrum disorder, which calls for specific assessment and support.

Unusual experiences of toxic or neurological origin.

How to use it

Read sections 3 to 14 first: they ground the choices made in the sessions. The sessions described are key sessions; each may take two or three. Sections 31 to 36 detail what the sessions introduce. Section 39 says what must not be dropped. The patient's folder contains seven worksheets: worksheet 1 is used in sessions 2 and 13, worksheet 2 in sessions 4 and 5, worksheet 3 in sessions 6 and 9, worksheet 4 in sessions 7 and 8, worksheet 5 in sessions 11 and 12, worksheet 6 in session 15, and worksheet 7 in sessions 14 and 16.

3. The clinical picture

What defines the disorder

A lasting deficit in social and interpersonal relationships, marked by acute discomfort with, and reduced capacity for, close relationships, together with cognitive or perceptual distortions and eccentric behaviour, present since early adulthood and in a variety of contexts.

The forms it takes

Ideas of reference: the impression that trivial events, remarks or objects have a special meaning for oneself, without reaching delusional conviction.

Odd beliefs or magical thinking that influence behaviour and are not shared by the cultural group: telepathy, clairvoyance, a sixth sense, idiosyncratic superstitions, the power of thought over events.

Unusual perceptions, including bodily illusions: sensing a presence, hearing one's name whispered, perceiving changes in one's body.

Idiosyncratic thinking and speech: vague, circumstantial (loaded with details that delay getting to the point), metaphorical, overelaborate or stereotyped, without frank disorganisation.

Mistrust and ideas of persecution.

Inappropriate or constricted affect.

Odd, eccentric or peculiar behaviour or appearance.

Few close friends or confidants outside first-degree relatives.

Excessive social anxiety that does not diminish with familiarity, and that stems more from persecutory fears than from a negative judgement of oneself.

What patients describe

Experiences that seem real to them and that others do not understand. A world full of signs. A loneliness that is often endured, sometimes a sense of being apart, different, gifted with a special sensitivity. Weariness with relationships, which leave them tense even with people they know. And, sometimes, a fear: am I going mad?

What is seen in the consulting room

A singular presentation: clothing, gestures, way of speaking. Speech that circles, becomes precise and then loses its thread, and uses words in a particular sense. Unusual eye contact. Discreet mistrust. Affect that does not always match what is being recounted. Normal or even high intelligence is possible, and it contradicts nothing.

What is not part of it

Fixed delusions, persistent hallucinations, frank disorganisation: these indicate a psychotic disorder.

Epidemiology and course

Estimates in the general population range from under 1% to a few per cent, depending on the study and the method (American Psychiatric Association, 2022). The disorder is more common among relatives of people with schizophrenia (Rosell et al., 2014). It is generally stable, but a minority of patients progress to a psychotic disorder, particularly when attenuated symptoms are worsening, functioning is declining and cannabis is being used. Depression and anxiety are common.

4. The cycle of unusual experiences

The model that guides this programme combines a stress-vulnerability model with a cognitive and interpersonal cycle.

Vulnerability

A particular sensitivity, partly hereditary, that makes unusual experiences more likely: ambiguous perceptions, a tendency to link unrelated events, to perceive meaning where others see none. This vulnerability is expressed more under stress, with lack of sleep, and with cannabis.

The five links

1. The experience. An ambiguous perception, a coincidence, a bodily sensation, an impression of meaning.

2. The interpretation. Among the possible explanations, an external or personal one is adopted: it's a sign, they're talking about me, someone is sending me a message, I have a gift.

3. The emotion. Anxiety and threat if the interpretation is persecutory; elation or a sense of importance if it is magical or special.

4. The response. Rituals, checking, vigilance, withdrawal, searching for other signs, consulting sources that confirm.

5. The loss of corrective feedback. Isolation deprives the patient of other people's views on their interpretations; sources that confirm are often the only ones consulted. The interpretation becomes entrenched.

The social loop

Mistrust and anxiety in relationships lead to withdrawal. Withdrawal reduces opportunities to feel safe with others, and removes corrective feedback. Others perceive the singularity and the mistrust, keep their distance or mock. The sense of being apart and under threat grows stronger.

What treatment does

It reduces what amplifies vulnerability — stress, sleep, cannabis —, it slows down interpretation and broadens the range of possible explanations, it reduces the responses that maintain the cycle — checking, searching for signs, withdrawal —, it gradually restores corrective feedback through safer relationships, and it monitors what would signal a progression.

What the model explains to the patient

That their experiences are real as experiences. That many people have similar ones, to varying degrees. That the way of understanding them changes the way of living them. And that certain things amplify them, which they can act on.

5. Unusual beliefs, culture and spirituality

Why this section exists

Because a belief is not odd in itself: it is odd in relation to a group. Believing in spirits, the evil eye, healing prayer, premonitory dreams or astrology can be entirely ordinary in a given setting. Diagnosing a shared belief is a clinical error, and a form of cultural disqualification.

What needs to be distinguished

Shared beliefs held by a religious, spiritual or cultural group, handed down, and recognised by members of the group as part of their tradition.

Idiosyncratic beliefs, specific to the patient, which their own group finds odd, or which take an excessive personal form: I have a power no one else has, the signs are addressed to me alone.

Spiritual experiences, which can be intense and unusual without being pathological, and which are often experienced as enriching.

How to tell the difference

Ask the patient how the people around them, their community, their group see these beliefs.

Ask, if the patient agrees, for the view of someone from their community or of a colleague familiar with their culture.

Look at the effects: distress, impairment, isolation, behaviour that puts them at risk.

What you do

You do not judge a shared belief. You work, if the patient wishes, on the distress and the impairment. And you remain attentive to the way a cultural belief can take a personal form that changes its nature.

Groups that exploit

Some vulnerable, isolated people in search of meaning are recruited by groups that exploit these beliefs. The therapist takes an interest without judging the belief, by looking at the effects: money, isolation from family, obedience, loss of autonomy.

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