4.3.5 - Psychological explanations for schizophrenia

Psychological explanations

A person can continue hearing a distressing voice even when nobody nearby is speaking. A relative can become increasingly anxious and critical as symptoms worsen. Psychological explanations ask about the processes within these experiences: how thoughts are monitored, how meanings are interpreted, and how relationships can increase or reduce stress. Explaining a symptom now, explaining a relapse and explaining the original onset are different goals.

For this topic, keep the two main routes separate:

AO1 answers describe the explanations accurately. AO2 answers apply them to details in a scenario. AO3 answers evaluate whether the explanation is supported, whether it is ethical, and whether it gives a complete account of schizophrenia.

Two warnings will protect many exam answers.

First, do not write as if one family style directly "causes" schizophrenia by itself. The modern picture is interactionist: psychological stressors may matter most when they combine with biological vulnerability.

Second, do not write as if cognitive explanations explain the original cause of schizophrenia. They are strongest as proximal explanations: they explain what is happening in the person's thinking to produce symptoms now.

Early family theories

Family dysfunction explanations argue that the family environment can create stress, confusion or vulnerability. Two historical examples help illustrate family-dysfunction explanations. The specification requires family dysfunction, rather than naming these two theories as compulsory studies; neither is an established single cause of schizophrenia.

The schizophrenogenic mother

Frieda Fromm-Reichmann developed the idea from clinical work with people diagnosed with schizophrenia. She suggested that some patients had experienced cold and rejecting early relationships, particularly with their mother. The claim was that a tense, secretive family climate could lead the child to distrust other people, and that this distrust might later appear as paranoid delusions.

This is useful AO1 because it gives a clear family-dysfunction route: early emotional relationships create anxiety and distrust. However, it is weak AO3 if treated as a modern causal explanation. The evidence came largely from retrospective clinical observations, not controlled studies. It is also socially sensitive because it can blame mothers for a serious disorder.

Double-bind theory

Bateson, Jackson, Haley and Weakland (1956) shifted the focus from a parent's personality to family communication. In a double bind, a child receives mixed messages at different levels. For example, a parent might say "come here, I love you" while using a hostile tone or body language. If the child approaches, they may be rejected; if they withdraw, they may be accused of being unloving. The key point is that the child cannot safely ask, "Which message do you mean?"

The proposed AO1 chain is:

1. The child repeatedly experiences contradictory communication.
2. The child cannot resolve or challenge the contradiction.
3. The world becomes confusing and threatening.
4. This may be reflected in symptoms such as disorganised thinking or paranoid delusions.

Bateson et al. proposed this mechanism; they did not establish that double binds cause schizophrenia. Evidence for a general stress-vulnerability link does not validate the specific double-bind theory.

AO2 example: If Sofia's father tells her he wants honesty but becomes cold and silent whenever she tells the truth, Sofia is placed in a double bind. Whatever she does can be treated as wrong, so she may learn that social meanings are unstable and threatening.

An ordinary disagreement or one inconsistent message is not enough to establish a double bind. The historical theory proposes a repeated relationship in which contradictory demands are difficult to escape and the contradiction cannot safely be discussed. Even if a scenario fits this pattern, that is an application of the theory, not proof that the pattern produced schizophrenia. Distinguishing a proposed mechanism from a demonstrated cause prevents family examples becoming accusations.

Expressed emotion

Expressed emotion is the family explanation with the clearest link to relapse. It does not usually claim to explain the original cause of schizophrenia. Instead, it explains why symptoms may return or worsen after diagnosis, especially when the person is living with carers or relatives.

High expressed emotion usually includes three elements:

• Criticism: frequent negative comments about the person or their behaviour.
• Hostility: anger, rejection or treating the person as the problem rather than as someone experiencing symptoms.
• Emotional over-involvement: intrusive concern, overprotectiveness or exaggerated self-sacrifice.

The proposed mechanism is a stress pathway. Repeated criticism or intrusive monitoring may increase arousal and distress for someone already vulnerable to symptoms. Conflict can also disrupt support or engagement with care. These processes could raise relapse risk; an association with high EE does not show that every family interaction has this effect or that relatives caused the original disorder.

Linszen et al. (1997) studied recent-onset schizophrenia and related disorders and found expressed emotion predicted relapse during follow-up. Ma et al. (2021) pooled prospective cohort evidence and found that high EE predicted early relapse more strongly than relapse after 12 months. Measuring EE before later relapse improves the timing evidence, but symptoms already present may have influenced relatives before that measurement. This supports EE as a risk indicator more strongly than it supports a simple one-way family cause.

AO3 balance: EE evidence supports a family-stress explanation, but it still has causality problems. High criticism might increase relapse, but living with severe symptoms can also increase family stress and criticism. A high-quality answer treats EE as part of a two-way family process, not as proof that relatives are to blame.