Positive symptoms of schizophrenia involve experiences or behaviors that are added or distorted, such as hallucinations and delusions. Negative symptoms involve reductions in functions such as motivation, speech, emotional expression, or social engagement. The words describe a change in functioning; they do not mean that one group of symptoms is good and the other is bad. The NHS explains the positive and negative symptom groups.
For nursing students, the practical question is: What is the person experiencing, what has changed, and how is daily life affected? A symptom category helps organize observations. It does not establish a diagnosis or replace an assessment by the clinical team.
Positive and negative symptoms at a glance
| Category | What the term describes | Examples to recognize |
|---|---|---|
| Positive symptoms | An added or distorted experience | Hearing a voice without an external speaker; a fixed false belief |
| Negative symptoms | Reduced expression, motivation, or engagement | Less spontaneous speech; diminished facial expression; difficulty initiating activities |
| Cognitive symptoms | Problems with thinking abilities | Difficulty sustaining attention, remembering information, or using information to make decisions |
The NIMH schizophrenia guide discusses psychotic, negative, and cognitive symptoms separately. Different references organize the groups somewhat differently. For example, the American Psychiatric Association lists disorganized symptoms as a separate category. Learn your course's framework while keeping the actual observation clear.
What counts as a positive symptom?
Two important examples are hallucinations and delusions:
- A hallucination is a sensory experience without a corresponding external stimulus. Hearing voices is one example; hallucinations can involve other senses, too.
- A delusion is a fixed false belief that persists despite evidence against it. It is a disturbance of belief, rather than a sensory experience.
The NHS symptoms guide describes both, along with disorganized thinking and speech. In a learning exercise, distinguish what someone perceives from what someone believes. Neither can be identified from facial expression alone.
Consider two fictional statements:
- “I hear a person speaking even when nobody is in the room” describes a reported auditory experience.
- “The television presenter is sending instructions specifically to me” describes a belief about the meaning of a broadcast.
These examples illustrate vocabulary, not a way to diagnose a person from a sentence. Assessment still needs context and possible alternative explanations.
What counts as a negative symptom?
The American Psychiatric Association describes five key negative symptoms:
| Term | Plain-language meaning | Fictional observation that could prompt assessment |
|---|---|---|
| Avolition | Reduced drive to begin or sustain purposeful activity | A person needs repeated prompting to start a familiar task |
| Alogia | Reduced speech output | Responses are much shorter and less spontaneous than usual |
| Anhedonia | Reduced experience of pleasure | A person reports little enjoyment in previously enjoyable activities |
| Asociality | Reduced desire for social contact | A person describes less interest in spending time with others |
| Diminished emotional expression | Less outward expression of emotion | Facial expression and vocal tone vary little during conversation |
A useful memory aid is positive = added or distorted; negative = reduced. The terms in the table are descriptions, not judgments about effort or character.
Reduced emotional expression does not establish what a person feels internally. A quiet voice is something you can observe; “does not care” is an interpretation. Keep those separate when discussing a practice case.
Why negative symptoms need careful assessment
Negative symptoms can be less noticeable than hallucinations or delusions, yet still interfere with relationships, work, and self-care. They may resemble depression and can be mistaken for intentional laziness or rudeness. A person can have positive and negative symptoms together, and their pattern can change over time. The NIMH guide describes negative symptoms and their overlap with other conditions; the NHS explains the risk of misinterpreting them as laziness.
Do not classify every quiet, withdrawn, or unmotivated person as having schizophrenia. The NHS diagnosis guide explains that diagnosis requires specialist assessment, including checking whether another condition or substance could explain the symptoms.
For a student case discussion, ask:
- Baseline: Is this behavior usual for this person, or a change?
- Timeline: When did the change begin, and what else happened around that time?
- Function: What is happening with conversation, everyday tasks, relationships, and self-care?
- Context: What does the person report, and what remains unknown?
This checklist organizes questions for supervised assessment. It is not a diagnostic checklist.
Keep cognitive symptoms in view
Trouble concentrating or retaining information is not the same observation as reduced motivation. NIMH describes difficulties with attention, memory, and using information as cognitive symptoms. Someone may want to participate but find a conversation or task difficult to follow. Read NIMH's explanation of cognitive symptoms.
In a fictional case, “does not begin the task” and “begins the task but repeatedly loses the instructions” deserve different follow-up questions. Neither observation proves its cause. Avoid treating every difficulty as unwillingness.
Turn a label into a useful nursing observation
Practice replacing broad judgments with specific descriptions:
- Instead of “uncooperative,” write: “Answered three open-ended questions with one-word responses; usual speech pattern is unknown.”
- Instead of “lazy,” write: “Did not begin the planned activity after two invitations; reports difficulty getting started.”
- Instead of “emotionless,” write: “Facial expression changed little during the conversation; described feeling worried.”
These are original documentation exercises, not charting templates for every setting. Use your instructor's guidance and local documentation requirements. For more on separating reports from observations, see subjective versus objective data in nursing.
Keep communication respectful. NIMH notes that hallucinations and beliefs can feel real to the person and recommends supportive, kind responses. Most people with schizophrenia are not violent; assess the individual situation instead of assuming danger from a diagnosis. NIMH's guidance for supporting someone with schizophrenia provides context. If an actual clinical encounter raises an immediate safety concern, involve the supervising nurse and follow the setting's emergency procedures.
Check your understanding
These are original fictional learning checks, not official exam questions.
1. A person reports hearing a voice when no speaker is present. Which category does this illustrate?
A positive symptom: a reported auditory hallucination. The example identifies an experience, not its cause or diagnosis.
2. A person uses few spontaneous words and has much less variation in facial expression than their known baseline. Which concepts fit?
Reduced speech output and diminished emotional expression. These are negative-symptom concepts; further assessment is needed before attributing the change to schizophrenia.
3. A person says they want to join an activity but repeatedly loses track of its instructions. Is that enough to call it avolition?
No. The example raises questions about attention and memory. Wanting to participate, initiating a task, and following instructions are different observations.
When reviewing your answers, name the observation first, then the symptom concept, then the information still needed. That sequence keeps the vocabulary connected to the person rather than turning it into a label.
AI-assistance note: This article was prepared with AI assistance, and its cover image is AI-generated. It is an educational resource, not individualized medical advice or a substitute for instruction and supervised clinical assessment.
