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Positive Symptoms

Positive symptoms are added abnormal experiences or behaviors, like hallucinations, delusions, and disorganized thinking, often seen in schizophrenia and other psychotic disorders.

Last updated July 2026

What are Positive Symptoms?

Positive symptoms in Abnormal Psychology are signs that something has been added to normal mental functioning, or that perception and thought have been distorted. They are called "positive" because they are present above baseline, not because they are good. The biggest examples are hallucinations, delusions, and disorganized thinking.

A hallucination is a perception without an external stimulus, like hearing a voice when no one is speaking or seeing something that is not there. A delusion is a fixed false belief, such as believing strangers are secretly monitoring you. Disorganized thinking shows up in speech or ideas that jump around, lose the main point, or connect in strange ways.

In schizophrenia and other psychotic disorders, positive symptoms are usually the most noticeable to other people. Someone might talk to voices that are not there, respond to a belief that does not match reality, or have trouble following a conversation because their thoughts are fragmented. These symptoms can come and go, and they often get worse during an acute episode.

Positive symptoms are different from negative symptoms, which involve a loss of normal functions like emotional expression or motivation. That difference matters because a person can have both kinds at once, and each points to different kinds of treatment needs. For example, antipsychotic medication is used mainly to reduce hallucinations and delusions, while therapy may help the person examine the meaning of those experiences and cope with stress.

Abnormal Psychology also uses positive symptoms to think about diagnosis and cause. They are one reason clinicians consider psychosis, but they do not automatically mean schizophrenia. A mood disorder with psychotic features, substance use, or another psychotic disorder can also produce positive symptoms, so the bigger picture matters too.

Why Positive Symptoms matter in Abnormal Psychology

Positive symptoms matter in Abnormal Psychology because they are one of the clearest signs that a psychotic disorder may be present. When you see hallucinations, delusions, or clearly disorganized thinking in a case study, you are usually being asked to identify psychosis and think about what diagnosis fits best.

They also help you separate symptoms from causes. Positive symptoms are not the same thing as being "crazy" or "confused" in a vague sense. They point to specific disruptions in perception and belief, which can come from schizophrenia, brief psychotic disorder, delusional disorder, schizoaffective disorder, or even medical and substance-related causes.

This term also connects directly to treatment. Antipsychotic medication is often aimed at lowering the intensity of positive symptoms, especially when a person is hearing voices or holding strongly fixed delusions. In class discussions and case write-ups, that makes positive symptoms a bridge between diagnosis, symptom tracking, and treatment planning.

If you are reading a vignette, positive symptoms are often the clues that tell you the person is not just anxious, sad, or stressed. You are looking for a break from shared reality, not just unusual personality or emotion.

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How Positive Symptoms connect across the course

Hallucinations

Hallucinations are one of the clearest positive symptoms, and they show up when a person perceives something that is not actually present. In Abnormal Psychology, these are often auditory, like hearing voices, but they can also be visual, tactile, or other sensory experiences. When a case mentions a person reacting to voices or seeing figures that others do not see, this is usually the symptom you are identifying.

Delusions

Delusions are fixed false beliefs that stay in place even when evidence points the other way. They are a major positive symptom because the issue is not just an odd opinion, but a belief that has lost touch with reality. In diagnosis questions, delusions often help you tell psychosis apart from normal worry, overthinking, or a misunderstanding.

Disorganized Thinking

Disorganized thinking is often noticed through speech that is hard to follow, jumps topics, or connects ideas in a way that does not make sense to others. It is a positive symptom because it reflects a distortion in thought process, not just poor communication skills. In a written case, look for loose associations, derailment, or answers that never reach the point.

Affective Flattening

Affective flattening is a negative symptom, so it contrasts with positive symptoms rather than duplicating them. It involves reduced emotional expression, like limited facial movement, flat voice tone, or low visible reaction. This comparison helps you sort out whether a case is showing added unusual experiences or missing normal emotional display.

Are Positive Symptoms on the Abnormal Psychology exam?

A case analysis or multiple-choice question usually gives you a symptom description and asks you to name what is happening. If the person reports hearing voices, having firm false beliefs, or speaking in a way that is hard to follow, positive symptoms are the clue you use to identify psychosis-related disturbance.

In short-answer work, you may need to explain why the symptom is positive rather than negative. A strong response points to the presence of an added experience or distortion of reality, then connects that to a disorder like schizophrenia or another psychotic disorder.

When a prompt asks about treatment, you can use the term to explain why antipsychotic medication or CBT might be introduced. The symptom label helps you describe what the treatment is targeting, not just name the disorder.

Positive Symptoms vs Negative Symptoms

Positive symptoms add abnormal experiences or distort reality, while negative symptoms remove normal functions like emotional expression, motivation, or speech. This is one of the most common distinctions in schizophrenia questions, so check whether the vignette is about something extra being present or something normal being absent.

Key things to remember about Positive Symptoms

  • Positive symptoms are added or distorted experiences, not just unusual behavior in a general sense.

  • Hallucinations, delusions, and disorganized thinking are the main examples you will see in Abnormal Psychology.

  • These symptoms are strongly associated with schizophrenia, but they can also appear in other psychotic disorders and some medical or substance-related conditions.

  • Positive symptoms often stand out in case vignettes because they involve a break from shared reality.

  • The contrast with negative symptoms helps you tell whether the case is about something extra being present or something normal being reduced.

Frequently asked questions about Positive Symptoms

What is positive symptoms in Abnormal Psychology?

Positive symptoms are excesses or distortions of normal mental functioning, especially in psychotic disorders. The classic examples are hallucinations, delusions, and disorganized thinking. They are called "positive" because something has been added, not because the symptom is beneficial.

What are examples of positive symptoms?

Common examples include hearing voices that are not there, believing something false with complete certainty, and speaking in a way that is hard to follow. These symptoms often show up together in schizophrenia, but they can also appear in other psychotic disorders. A case description usually gives you a few of these clues at once.

How are positive symptoms different from negative symptoms?

Positive symptoms involve added or distorted experiences, while negative symptoms involve a loss of normal behavior or emotional response. Hallucinations and delusions are positive symptoms, but flat affect and low motivation are negative symptoms. If the person seems to have something unusual present, think positive symptoms. If they seem to have less than normal, think negative symptoms.

What disorder is most associated with positive symptoms?

Schizophrenia is the disorder most closely linked to positive symptoms, especially hallucinations, delusions, and disorganized thinking. That said, these symptoms are not exclusive to schizophrenia. A clinician also looks at timing, mood symptoms, substance use, and functional impairment before deciding on a diagnosis.

Positive Symptoms | Abnormal Psychology | Fiveable