Welcome to the World of Schizophrenia!
Hello! Today we are diving into one of the most fascinating (and often misunderstood) topics in Psychology: Schizophrenia. Because this is part of your "Issues and Options" section, we aren't just looking at what the disorder is; we are looking at how doctors diagnose it, the different ways we explain it, and how we treat it. Don’t worry if it seems like a lot of big words at first! We will break everything down into bite-sized pieces.
Important Note: Many people think Schizophrenia means "split personality." It doesn't! That is a different condition. Schizophrenia is a psychotic disorder where a person loses some touch with reality.
1. Classification and Diagnosis
To help someone, doctors first need to identify what is happening. We divide the symptoms of Schizophrenia into two groups: Positive and Negative.
Positive Symptoms (Added Behaviours)
Think of "Positive" like a plus sign (+). These are extra experiences that healthy people don't usually have.
- Hallucinations: Unusual sensory experiences. These can be auditory (hearing voices) or visual (seeing things that aren't there).
- Delusions: Beliefs that have no basis in reality. For example, a "delusion of grandeur" is believing you are a famous person or have superpowers.
Negative Symptoms (Taken-away Behaviours)
Think of "Negative" like a minus sign (-). These are normal functions that the person has lost.
- Speech Poverty (Alogia): A reduction in the amount or quality of speech. The person might give very short, empty answers.
- Avolition: A total lack of motivation. It’s like their "get up and go" has gone. They might stop looking after themselves or lose interest in hobbies.
Issues in Diagnosis
Diagnosing Schizophrenia isn't always easy. Psychologists have to watch out for:
- Co-morbidity: This is when a person has two or more conditions at once (e.g., Schizophrenia and Depression). This makes it hard to tell which symptom belongs to which disorder.
- Symptom Overlap: Some symptoms of Schizophrenia are also symptoms of other things, like Bipolar Disorder.
- Gender Bias: Research suggests men are diagnosed more often than women. This might be because women often function better socially, masking their symptoms.
- Culture Bias: In some cultures, "hearing voices" is seen as a spiritual gift rather than a mental illness. Western doctors might misdiagnose people from these cultures.
Quick Review: Positive = Addition (Voices/Delusions). Negative = Subtraction (No speech/No motivation).
2. Biological Explanations
Is it all in the genes? The biological approach says yes (partly!).
Genetics
Schizophrenia runs in families. We use concordance rates (the % chance that if one person has it, the other does too) to study this. Example: If an identical twin has Schizophrenia, the other twin has roughly a 48% chance of developing it. For non-identical twins, it’s only about 17%.
The Dopamine Hypothesis
Dopamine is a chemical messenger (neurotransmitter) in the brain.
1. Hyperdopaminergia: High levels of dopamine in the subcortex are linked to hallucinations.
2. Hypodopaminergia: Low levels of dopamine in the prefrontal cortex are linked to negative symptoms like avolition.
Neural Correlates
This is just a fancy way of saying "patterns of brain activity that link to symptoms." For example, people with avolition often have lower activity in the ventral striatum (the brain's reward centre).
Memory Aid: Use the "Dopamine Dial" analogy. Too high in one area = hallucinations; too low in another = no motivation.
3. Psychological Explanations
This approach looks at how the environment and the way we think might cause Schizophrenia.
Family Dysfunction
Some psychologists argue that "toxic" family environments cause stress that leads to Schizophrenia:
- The Schizophrenogenic Mother: An old (and controversial) theory describing a mother who is cold, rejecting, and controlling, creating a climate of secrecy.
- Double-Bind Theory: When a child receives mixed messages (e.g., a parent saying "I love you" while looking disgusted). This leaves the child confused about reality.
- Expressed Emotion (EE): This is about high levels of criticism, hostility, or over-involvement from carers. This is a huge risk factor for relapse.
Cognitive Explanations
Christopher Frith (1992) identified two types of dysfunctional thought processing:
- Metarepresentation Dysfunction: This is the ability to reflect on our own thoughts. If this is "broken," a person might think their own internal voice is an external voice (causing hallucinations).
- Central Control Dysfunction: This is the ability to suppress automatic responses. If this is broken, a person can’t stop themselves from saying every word that pops into their head (causing speech poverty/disorganisation).
Key Takeaway: Psychological theories focus on the family environment and faulty "wiring" in how we process thoughts.
4. Drug Therapy (Biological Treatment)
Antipsychotic drugs are the most common treatment. They usually come as tablets or syrups.
Typical Antipsychotics (The Old Ones)
Example: Chlorpromazine. These work by acting as antagonists, meaning they block dopamine receptors in the brain to reduce hallucinations. Warning: They can have nasty side effects, like dry mouth or "shaking" (tardive dyskinesia).
Atypical Antipsychotics (The New Ones)
Examples: Clozapine and Risperidone. These are newer and aim to have fewer side effects. They don't just block dopamine; they also act on serotonin and glutamate. This helps improve mood and reduce negative symptoms as well as positive ones.
Common Mistake to Avoid: Don't say drugs "cure" Schizophrenia. They manage the symptoms so the person can live a more normal life.
5. Psychological Therapies
These are often used alongside drugs to help patients cope better.
Cognitive Behaviour Therapy (CBT)
The goal is to help patients identify and challenge their irrational thoughts. If a patient hears a voice saying "The government is spying on you," the therapist will help them look for evidence and find a more logical explanation. It makes the hallucinations feel less scary.
Family Therapy
Instead of blaming the family, this therapy works with them. It aims to reduce Expressed Emotion (EE), improve communication, and help family members understand the disorder. If the home is less stressful, the patient is less likely to have a relapse.
Did you know? Family therapy is often more about helping the carers stay sane so they can support the patient effectively!
6. The Interactionist Approach
Most modern psychologists prefer this view. It says Schizophrenia isn't just nature or just nurture—it's both!
The Diathesis-Stress Model
This model says you need two things to develop Schizophrenia:
- Diathesis (Vulnerability): Usually a genetic predisposition (being born with certain "risk" genes).
- Stress (Trigger): An environmental experience that "triggers" the condition (like childhood trauma, drug use, or high family stress).
Analogy: Imagine two people holding a glass of water. Person A’s glass is already 90% full (high genetic risk). Person B’s glass is only 10% full (low risk). If you add a "splash" of stress (trauma), Person A’s glass overflows (they get Schizophrenia), but Person B’s glass is still fine.
Interactionist Treatment
Because the cause is complex, the treatment should be too! This approach suggests using Antipsychotic drugs PLUS Psychological therapy (like CBT) at the same time. Research shows this combination is usually more effective than either one alone.
Quick Review Box:
- Diathesis = Internal/Genetic risk.
- Stress = External/Environmental trigger.
- Best Treatment = Drugs + Therapy.
You've reached the end of the Schizophrenia notes! Take a deep breath—you've covered the symptoms, the biases, the biology, the psychology, and the treatments. You've got this!