Difficulty: Intermediate | Prerequisites: Parts 1 and 2 of these notes (symptoms, diagnosis, biological theories). Understanding the dopamine hypothesis is especially helpful for the treatment section.
Big picture: Biology sets the stage for schizophrenia, but psychosocial factors shape its course. Stress, family dynamics, and cognitive style all influence when episodes occur, how severe they are, and whether the person recovers. Treatment combines medication (which controls symptoms, especially positive ones) with psychological, family, and community-based interventions (which address functioning, relapse prevention, and quality of life). No single treatment is sufficient on its own. This section covers the social and cognitive theories of schizophrenia, the full range of biological and psychosocial treatments, and the reality that most people with the disorder still do not receive adequate care.
Psychosocial factors like stress, expressed emotion in families, and cognitive biases influence relapse and course but do not cause schizophrenia on their own. Treatment combines typical or atypical antipsychotic medication (which targets dopamine and sometimes serotonin) with cognitive-behavioural therapy, social skills training, family therapy, and assertive community treatment. Medication controls positive symptoms but leaves negative symptoms and functioning largely unchanged, and side effects are a major barrier to adherence. Community mental health resources remain severely underfunded.
Social drift
The tendency for people with schizophrenia to move downward in social class because the disorder interferes with education and employment. In simple terms, the illness causes poverty, rather than poverty causing the illness.
Expressed emotion (EE)
A pattern of family interaction characterised by overinvolvement, overprotectiveness, hostility, and criticism directed at the family member with schizophrenia. High EE is strongly associated with higher relapse rates.
Schizophrenogenic mother
An early (now discredited) theory that schizophrenia was caused by dominating, rejecting mothers who put children in impossible "double binds." This concept is no longer supported by evidence and is important to know only as a historical example of blaming families.
Double bind
The situation in which a person receives contradictory messages from the same source, making any response feel wrong. Originally proposed as a cause of schizophrenia (now discredited as a causal theory, though family communication patterns remain relevant to relapse).
Chlorpromazine
The first phenothiazine antipsychotic, introduced in the 1950s. It calms agitation and reduces hallucinations and delusions by blocking dopamine receptors.
Akinesia
A side effect of typical antipsychotics: slowed motor activity, monotonous speech, and an expressionless face. In simple terms, the medication produces symptoms that look like some of the negative symptoms of schizophrenia itself.
Akathisia
A side effect of phenothiazines causing restless agitation, making the person unable to sit still.
Clozapine (Clozaril)
An atypical antipsychotic that binds to the D4 dopamine receptor and also influences serotonin. Effective for patients who do not respond to other drugs. Carries the risk of agranulocytosis (1–2%), requiring regular blood monitoring.
Assertive community therapy (ACT)
The gold standard for community-based interventions. A multidisciplinary team provides comprehensive 24-hour services to help people with schizophrenia live in the community, maintain employment, and prevent hospitalisation.
Token economy
A behavioural intervention used in psychiatric hospitals where patients earn tokens for completing self-care tasks or engaging appropriately with others, exchangeable for privileges.
People with schizophrenia are more likely to live in chronically stressful, low-socioeconomic conditions
Social drift explains this: the disorder impairs education and work, causing the person to fall below the social class of their family of origin. Men with schizophrenia end up in classes well below their fathers; healthy brothers remain at or above their fathers' level
People with psychosis are about 5 times more likely to have been born in a large city
Torrey and Yolken suggest the mechanism is pre/perinatal exposure to infectious agents (which are more prevalent in urban areas), rather than overcrowding or general urban stress
Stress does not cause schizophrenia, but it can trigger new episodes in someone who already has the disorder
High levels of stress tend to occur shortly before the onset of a new episode
Immigration is one major stressor linked to increased relapse risk (financial pressure, language barriers, cultural adjustment)
Important caveat: more than 50% of relapses occur without an identifiable negative life event, so stress is a contributing factor, not a sufficient explanation
Some apparent "stressors" (e.g. a relationship breakdown) may themselves be partially caused by prodromal symptoms such as social withdrawal
Historical context (now discredited):
Early theorists blamed "schizophrenogenic mothers" who were thought to dominate, reject, and confuse their children through contradictory communication ("double bind" theory)
This theory is no longer accepted as an explanation for the cause of schizophrenia
Expressed emotion (current, evidence-based):
Expressed emotion describes a family pattern of overinvolvement, overprotectiveness, hostility, and criticism
High EE families are associated with significantly higher relapse rates
Key characteristics of high-EE families:
They do not doubt the illness is real, but they behave as though the person can control their symptoms
They tend to be understanding of positive symptoms but unforgiving of negative symptoms, viewing avolition or flat affect as laziness or stubbornness
They often have specific ideas about what the family member should do to "get better"
Longitudinal evidence: families with low warmth and high criticism are associated with a greater likelihood of the person developing the full syndrome of schizophrenia
Family members who rate high on expressed emotion are themselves more likely to have some form of psychopathology
Interventions that reduce expressed emotion in families reduce relapse rates
Interventions must be culturally sensitive: family therapy approaches that worked in some populations backfired in Hispanic families
Beck and Rector proposed that fundamental difficulties in attention, inhibition, and communication lead people with schizophrenia to adopt certain cognitive biases to conserve their limited cognitive resources
How cognitive processes contribute to symptoms:
Delusions emerge when the person tries to explain strange, overwhelming perceptual experiences
Hallucinations come from hypersensitivity to perceptual input combined with a tendency to attribute internal experiences to external sources
Negative symptoms arise from expectations that social interaction will be aversive and from the need to withdraw to conserve cognitive resources
Cognitive therapies teach patients to identify and challenge delusional beliefs and hallucinatory experiences, and to develop more positive expectations about social activity
Cognitive intervention has shown greater success in reducing symptoms than simply providing supportive therapy
Historical treatments (largely abandoned):
Brain surgery (lobotomy): patients were calmer but suffered severe cognitive deficits
Insulin coma therapy: dangerous and rarely effective
ECT: little effect on schizophrenia
Before the 1950s, most people with schizophrenia were warehoused in psychiatric hospitals. By 1955, 50% of psychiatric hospital patients carried a schizophrenia diagnosis (though many would be diagnosed differently by current standards). They received custodial care, rarely treatment that improved symptoms
Typical antipsychotic drugs:
Chlorpromazine (introduced 1950s): the first phenothiazine, calms agitation, reduces hallucinations and delusions
Other phenothiazines: trifluoperazine (Stelazine), thioridazine (Mellaril), fluphenazine (Prolixin), perphenazine (Trilafon)
Other typical antipsychotic classes: butyrophenones (Haldol), thioxanthenes (Navane)
Mechanism: block dopamine receptors
Effects:
Positive symptoms can be controlled, even during asymptomatic maintenance periods
Hospitalisation rates halved after introduction
More effective for positive symptoms than negative
25% of patients do not respond at all
Even responsive patients are often "not actively psychotic but still unable to function normally"
Must be taken continuously. Discontinuation leads to 78% relapse within one year and 98% within two years, compared to 30% on medication
Side effects:
Common: grogginess, dry mouth, blurred vision, weight changes, constipation, menstrual irregularity, depression
Akinesia: slowed movement, monotonous speech, expressionless face (can mimic negative symptoms)
Parkinson's-like symptoms: muscle stiffness, facial freezing, tremors, spasms, akathisia (restless inability to sit still). These occur because the drugs reduce functional dopamine, and Parkinson's disease is also caused by dopamine deficiency
Tardive dyskinesia: involuntary repetitive movements of the tongue, face, mouth, or jaw. A serious, often irreversible side effect occurring in about 20% of long-term users
Clinicians prescribe the lowest effective dose to balance symptom control against side effects. Maintenance doses keep active symptoms at bay but do not restore full functioning, and negative symptoms remain
Atypical antipsychotics:
Generally more effective and better tolerated than typical antipsychotics
Clozapine (Clozaril):
Binds to the D4 dopamine receptor and influences serotonin
Helps many patients who never responded to phenothiazines
Reduces both positive and negative symptoms
Side effects: nausea, dizziness, sedation, seizures, hypersalivation, weight gain, tachycardia
1–2% develop agranulocytosis (deficiency of infection-fighting granulocytes), which can be fatal. Requires careful blood monitoring
Because of this risk, clozapine is typically reserved for patients who have not responded to other atypical antipsychotics
Risperidone (Risperdal), olanzapine (Zyprexa), ziprasidone (Geodon/Zeldox):
Do not carry agranulocytosis risk
Side effects: weight gain, increased diabetes risk, sexual dysfunction, sedation, low blood pressure, seizures, GI and visual problems, concentration difficulties
Clinical trial data (1,000+ patients, 18-month follow-up):
44.5% experienced remission of any duration
21% remission for 3+ months
11.7% remission for 6+ months
Olanzapine had the highest remission rates
Medication non-adherence is a major problem: patients stop because side effects are unbearable or because they believe they no longer need the medication
All of the following are given in addition to medication, not as replacements for it.
Cognitive treatments:
Help people recognise and change demoralising attitudes
Aim to increase willingness to seek help and participate in society
Teach patients to dispute delusional beliefs and challenge hallucinatory experiences
For negative symptoms: help patients develop the expectation that social activity will be rewarding rather than aversive
Behavioural treatments:
Based on social learning theory: use operant conditioning and modelling
Teach practical skills such as initiating conversations, asking for help, maintaining daily activities (cooking, cleaning)
Can be administered by family members (e.g. ignoring bizarre comments while reinforcing socially appropriate behaviour)
Token economies in psychiatric hospitals: patients earn tokens for self-care and social engagement, exchangeable for privileges
Social interventions:
Increase contact with supportive people through self-help groups
Teach problem-solving skills for common social situations
Family therapy:
Goals: reduce family self-blame, increase tolerance for uncontrollable symptoms, help families manage medication and side effects
Families learn communication skills to reduce harsh, conflictual interactions, plus problem-solving skills for practical issues (finances, daily stressors)
Specific behavioural techniques for encouraging appropriate behaviour
Evidence: family therapy combined with medication reduces relapse rates to 24%, compared to 64% for medication alone. Medication discontinuation drops to 33% with family intervention vs. 47% without
Must be culturally adapted; approaches that worked in some populations backfired in Hispanic families
Assertive community treatment (ACT):
Comprehensive services from a multidisciplinary team (medical professionals, social workers, psychologists) available 24 hours a day
Halfway houses: residential settings where mental health professionals provide support but residents manage the household and hold each other accountable (e.g. the Fairweather Lodge model). Outcomes far better than simple discharge to family or less intensive programmes
Assertive community therapy is the gold standard: patients are more likely to be employed during treatment and at 28-month follow-up
Limitations:
Skills gained tend to fade once the intervention ends
Only about 2% of people with schizophrenia are served by such programmes
The community mental health movement was never funded at the level its goals required
40–60% of people with schizophrenia receive little to no care in any given year
Those who are hospitalised often stay for too short a period to stabilise, are discharged with little follow-up, and many end up in nursing homes with custodial care only
Traditional healers use several models:
Structural model: symptoms arise from a loss of integration among body, emotion, cognition, and social/cultural self. Treatment involves reintegrating these levels through diet changes, herbal medications, or rituals
Social support model: symptoms come from conflictual relationships. Healing mobilises the patient's kin to provide support and reintegrates the person into a positive social network
Persuasive model: rituals transform the meaning of symptoms, reducing suffering
Clinical model: the patient's faith in the healer is itself therapeutic
Expressed emotion research has had direct clinical impact: family psychoeducation programmes are now a standard part of treatment guidelines for schizophrenia in most countries. The social drift concept explains why homelessness and incarceration rates are disproportionately high among people with schizophrenia, and why addressing housing and employment is a treatment concern rather than a separate social problem. The severe underfunding of community mental health programmes is a live policy issue: the fact that only 2% of people with schizophrenia access assertive community therapy, despite strong evidence for its effectiveness, illustrates the gap between what works and what is available.
"Bad parenting causes schizophrenia." The schizophrenogenic mother theory has been discredited. Family dynamics (particularly expressed emotion) influence relapse rates, but they do not cause the disorder.
"Medication cures schizophrenia." Medication controls symptoms, especially positive ones, but does not restore full functioning. Negative symptoms and cognitive deficits persist even with good pharmacological management.
"If someone stops taking their medication and relapses, they are being irresponsible." Side effects of antipsychotics can be severe (tardive dyskinesia, agranulocytosis, significant weight gain, sedation). Non-adherence is often a rational response to intolerable side effects, not defiance.
"Atypical antipsychotics have no serious side effects." They have a different side-effect profile (less tardive dyskinesia, no Parkinson's-like symptoms for most), but they carry risks of weight gain, diabetes, and, in the case of clozapine, potentially fatal agranulocytosis.
Expressed emotion is one of the most commonly tested psychosocial concepts in this chapter: high EE = high relapse, reduction of EE reduces relapse
Know the relapse rates on vs. off medication (30% on medication vs. 78% at 1 year and 98% at 2 years off medication)
Tardive dyskinesia: irreversible, 20% of long-term phenothiazine users, caused by dopamine blockade. Be able to define and distinguish it from akinesia and akathisia
Clozapine is the drug most commonly tested: D4 receptor, also affects serotonin, effective for treatment-resistant patients, agranulocytosis risk
Family therapy + medication is more effective than medication alone (24% vs. 64% relapse)
Social drift vs. social causation: schizophrenia causes downward social mobility, not the reverse
The 40–60% figure for people with schizophrenia receiving little or no care in a given year
True or False: Expressed emotion refers to the patient's own emotional expression.
Fill in the blank: Tardive dyskinesia involves involuntary movements of the __________, __________, __________, or jaw.
True or False: Family therapy combined with medication produces lower relapse rates than medication alone.
True or False: The community mental health movement has been adequately funded to meet the needs of people with schizophrenia.
Fill in the blank: If antipsychotic medication is discontinued, approximately __________% of patients relapse within one year.
(Answers: 1. False, it refers to the family's pattern of criticism, hostility, and overinvolvement; 2. tongue, face, mouth; 3. True (24% vs. 64%); 4. False, it has been severely underfunded; 5. 78%.)
Q: What is expressed emotion, and how does it relate to relapse in schizophrenia?
A: Expressed emotion is a family interaction pattern characterised by overinvolvement, overprotectiveness, hostility, and criticism. High expressed emotion is consistently associated with higher relapse rates. Family members with high EE tend to be understanding of positive symptoms but unforgiving of negative symptoms, treating avolition or flat affect as controllable. Interventions that reduce expressed emotion in families significantly reduce relapse rates.
Q: Explain the difference between social drift and social causation as explanations for the link between schizophrenia and low socioeconomic status.
A: Social drift means the disorder causes the person to move down in social class because symptoms interfere with education and employment. Social causation would mean that being in a low social class causes the disorder. The evidence supports social drift: men with schizophrenia end up in socioeconomic classes well below their fathers, while their healthy brothers remain at or above their fathers' class.
Q: Why is tardive dyskinesia a particularly concerning side effect of typical antipsychotics?
A: Tardive dyskinesia involves involuntary, repetitive movements of the tongue, face, mouth, or jaw. It develops in approximately 20% of people on long-term phenothiazine treatment and is often irreversible, meaning it persists even after the medication is stopped. It is caused by the drugs' blockade of dopamine receptors.
Q: What makes clozapine different from other atypical antipsychotics, and why is it not a first-line treatment?
A: Clozapine binds to the D4 dopamine receptor and also influences serotonin. It is effective for patients who do not respond to other antipsychotics and reduces both positive and negative symptoms. However, 1–2% of patients develop agranulocytosis, a potentially fatal deficiency of infection-fighting white blood cells. This requires regular blood monitoring and means clozapine is typically reserved for treatment-resistant cases after other atypical antipsychotics have been tried.
Q: Why is assertive community therapy considered the gold standard for community-based schizophrenia treatment, and what limits its impact?
A: ACT provides comprehensive, 24-hour multidisciplinary support. Patients are more likely to be employed during and after treatment, and outcomes are far better than discharge to family or less intensive programmes. Its impact is limited by the fact that only about 2% of people with schizophrenia have access to it, community mental health programmes have never been funded at the level their goals require, and skills gained tend to fade once the intervention ends.
Expressed emotion connects to health psychology and the broader literature on how family environments affect chronic illness outcomes (similar patterns are studied in diabetes and heart disease). The pharmacology of typical and atypical antipsychotics ties into the neurotransmitter material from Part 2 and to psychopharmacology more broadly. The community mental health content connects to public health policy, deinstitutionalisation, and the intersection of mental illness with homelessness and incarceration. The cognitive perspectives (Beck and Rector) connect to cognitive-behavioural therapy as covered in treatment chapters for depression and anxiety disorders.
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