AQA Syllabus focus:
'Positive symptoms of schizophrenia, including hallucinations and delusions; negative symptoms, including speech poverty and avolition.'
Schizophrenia is characterized by a pattern of symptoms that can add unusual experiences or take away normal functioning. Distinguishing positive from negative symptoms helps students describe the disorder accurately and precisely.
Understanding positive and negative symptoms
In schizophrenia, symptoms are often grouped into positive and negative categories.
This diagram summarizes schizophrenia symptoms by grouping them into positive symptoms (e.g., hallucinations and delusions) and negative symptoms (e.g., avolition and alogia/speech poverty). It supports the key AQA distinction that positive symptoms reflect added/distorted experiences, while negative symptoms reflect reductions in typical functioning. Source
This does not mean that one type is good and the other is bad. Instead, the terms describe whether something has been added to normal experience or taken away from normal functioning.
Positive symptoms: Experiences or behaviors that are added to a person's normal functioning, usually involving a distortion of reality.
Positive symptoms are often the most obvious signs because they can appear dramatic or bizarre to other people.
Negative symptoms: Reductions or losses of normal functions, such as motivation, speech, or emotional responsiveness.
Negative symptoms may be less noticeable at first, but they can seriously interfere with day-to-day life, relationships, and independence.
Positive symptoms
Positive symptoms usually reflect a loss of contact with reality. They can affect perception, beliefs, and interpretation of events. Two important positive symptoms named in the specification are hallucinations and delusions.
Hallucinations
Hallucinations are sensory experiences that occur in the absence of an external stimulus.
This figure illustrates a self-monitoring account of auditory hallucinations using the concepts of corollary discharge (CD) and efference copy (EC). It shows how disrupted suppression/prediction of self-generated speech-related activity could lead internally generated representations to be experienced as external voices. Source
Hallucinations: Perceptions of sounds, sights, or other sensations that seem real to the individual but are not caused by something actually present in the environment.
In schizophrenia, hallucinations are most commonly auditory, meaning the person hears voices or sounds that other people cannot hear. These voices may:
comment on behavior
argue with each other
repeat insulting statements
give commands
Hallucinations can also occur in other sensory forms, such as seeing things, feeling sensations on the skin, or smelling odors that are not there, although these are less common. The key feature is that the experience feels real to the person. Because of this, hallucinations can shape behavior. A person may answer back to voices, appear distracted, or become frightened by something nobody else can detect.
Delusions
Delusions are false beliefs that are held very strongly despite contrary evidence. They are not ordinary mistakes or simple misunderstandings. Instead, they involve a fixed conviction that is out of touch with reality.
Common examples include:
persecutory delusions, where the person believes others are trying to harm, spy on, or control them
grandiose delusions, where the person believes they have exceptional importance, power, or identity
delusions of reference, where neutral events are interpreted as having special personal meaning
Delusions can distort the way ordinary experiences are understood. For example, a stranger's glance, a news headline, or a passing comment may be interpreted as part of a plot or secret message. This can make social situations confusing and threatening.
Negative symptoms
Negative symptoms involve the absence or reduction of normal behaviors and experiences. They are not simply laziness or lack of effort. Instead, they reflect a genuine difficulty in producing normal responses and goal-directed activity. The specification highlights speech poverty and avolition.
Speech poverty
Speech poverty means a reduction in the amount and quality of speech. A person may give very short answers, speak less often, or take a long time to respond. Their speech may seem empty of detail, making conversation difficult to maintain.
This symptom is important because speech usually reflects thought. When speech is greatly reduced, it may suggest that thinking itself has become slowed or less productive. In everyday life, speech poverty can make the person seem withdrawn, uninterested, or difficult to engage with, even when that is not their intention.
Speech poverty may be seen as:
brief, one-word, or unelaborated replies
long pauses before answering
reduced spontaneous conversation
limited detail in explanations or descriptions
Avolition
Avolition refers to a reduction in the motivation to initiate and continue goal-directed activities.
Avolition: A severe lack of motivation that makes it difficult to start, persist with, or complete ordinary purposeful activities.
A person with avolition may struggle to begin tasks such as washing, studying, shopping, or meeting friends. They may sit inactive for long periods, not because they do not understand what needs to be done, but because initiating behavior is extremely difficult. This can affect school, work, self-care, and relationships.
Avolition is especially important because it can be mistaken for indifference. In reality, the person may want to act but feel unable to organize and sustain behavior. As a result, everyday functioning can decline substantially.
Patterns of symptoms
People with schizophrenia do not all show the same symptom pattern. Some may mainly experience positive symptoms, while others show prominent negative symptoms, and many experience both. Symptom severity can also change over time.
In general:
positive symptoms tend to be more visible because they involve unusual perceptions or beliefs
negative symptoms often have a major long-term effect on functioning because they reduce communication, activity, and motivation
both types can interfere with education, work, self-care, and social relationships
When describing schizophrenia, it is therefore important to identify not just that symptoms are present, but which kind of symptoms are present and how they affect the person's behavior and daily life.
Practice Questions
Identify one positive symptom of schizophrenia. (1 mark)
1 mark for identifying hallucinations or delusions.
Explain the difference between positive and negative symptoms of schizophrenia. Refer to hallucinations, delusions, speech poverty, and avolition in your answer. (6 marks)
1 mark for explaining that positive symptoms involve an addition to normal functioning or a distortion of reality.
1 mark for explaining hallucinations as perceptions without an external stimulus.
1 mark for explaining delusions as fixed false beliefs held despite contradictory evidence.
1 mark for explaining that negative symptoms involve a reduction or loss of normal functioning.
1 mark for explaining speech poverty as reduced amount or quality of speech.
1 mark for explaining avolition as reduced motivation for goal-directed behavior.
FAQ
Command hallucinations are voices that tell a person to do something.
They may involve simple actions, such as moving somewhere, or more distressing instructions. What matters clinically is not just the words themselves, but:
how often they occur
how powerful they seem
whether the person feels able to resist them
how upset or fearful they make the person feel
Yes. Insight can vary a lot.
Some people are fully convinced that the experience or belief is real. Others may feel uncertain, question it at times, or recognize later that it was part of their illness. Insight can also change over time, so a person may show more awareness on some days than others.
A strongly held opinion is usually open to discussion and linked to ordinary evidence or values.
A delusion is more rigid. It is typically maintained even when there is clear evidence against it, and it often involves a highly unusual interpretation of events. Delusions also tend to affect daily behavior, emotions, and relationships much more strongly than ordinary beliefs.
Other people may mistake speech poverty for rudeness, boredom, anxiety, or low ability.
In reality, the person may understand the conversation but struggle to produce fuller responses. This can make classroom discussion, interviews, and friendships harder. Helpful responses often include:
allowing extra time to answer
asking short, clear questions
not assuming silence means lack of interest
Procrastination and tiredness are common and usually improve with rest, pressure, or a reward.
Avolition is more persistent and affects many areas of life at once. The person may struggle to begin even basic tasks they genuinely want or need to do. It is not just poor time management. Instead, it reflects a serious reduction in the drive to initiate and maintain purposeful activity.
