side by side comparison

Schizophrenia: Positive vs Negative Symptoms — What's Added vs What's Missing

The word 'positive' doesn't mean good and 'negative' doesn't mean bad — yet students pick wrong answers on the NCLEX because they misclassify symptoms. Mixing them up changes your nursing priority, your expected medication response, and your discharge teaching.

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Comparison

Side-by-side2 compared
Dimension
Positive Symptoms
Negative Symptoms
Concept & neurochemistry
  • Excess — added to normal experience
  • ★Excess dopamine (mesolimbic)
  • Deficit — missing from normal function
  • Dopamine deficit (mesocortical)
Signs & symptoms
  • Hallucinations (auditory most common)
  • Delusions
  • disorganized speech
  • Thought broadcasting
  • bizarre behavior
  • ★Flat/blunted affect
  • Alogia
  • avolition
  • anhedonia
  • Social withdrawal
Onset & course
  • Often acute
  • prominent in psychotic episodes
  • Insidious
  • persist between episodes
Nursing approach
  • Don't argue with delusions
  • present reality
  • Maintain safety
  • PRN for agitation
  • Structure routine
  • brief concrete communication
  • Small achievable goals
  • reinforce self-care
Treatment & meds
  • Respond well to typicals & atypicals
  • Typicals do little
  • atypicals better but limited
  • ★Clozapine for treatment-resistant
Patient teaching
  • Adherence prevents relapse
  • report voices
  • Avoid substances
  • Keep routine
  • encourage social engagement
  • Adhere despite apathy
Safety — escalate
  • ★Command hallucinations — harm self/others
  • Acting on delusional beliefs
  • Self-neglect, malnutrition
  • nonadherence
Complications
  • Relapse
  • dangerous behavior
  • Greatest cause of long-term disability
Concept & neurochemistry

Positive Symptoms

  • Excess — added to normal experience
  • ★Excess dopamine (mesolimbic)

Negative Symptoms

  • Deficit — missing from normal function
  • Dopamine deficit (mesocortical)
Signs & symptoms

Positive Symptoms

  • Hallucinations (auditory most common)
  • Delusions
  • disorganized speech
  • Thought broadcasting
  • bizarre behavior

Negative Symptoms

  • ★Flat/blunted affect
  • Alogia
  • avolition
  • anhedonia
  • Social withdrawal
Onset & course

Positive Symptoms

  • Often acute
  • prominent in psychotic episodes

Negative Symptoms

  • Insidious
  • persist between episodes
Nursing approach

Positive Symptoms

  • Don't argue with delusions
  • present reality
  • Maintain safety
  • PRN for agitation

Negative Symptoms

  • Structure routine
  • brief concrete communication
  • Small achievable goals
  • reinforce self-care
Treatment & meds

Positive Symptoms

  • Respond well to typicals & atypicals

Negative Symptoms

  • Typicals do little
  • atypicals better but limited
  • ★Clozapine for treatment-resistant
Patient teaching

Positive Symptoms

  • Adherence prevents relapse
  • report voices
  • Avoid substances

Negative Symptoms

  • Keep routine
  • encourage social engagement
  • Adhere despite apathy
Safety — escalate

Positive Symptoms

  • ★Command hallucinations — harm self/others
  • Acting on delusional beliefs

Negative Symptoms

  • Self-neglect, malnutrition
  • nonadherence
Complications

Positive Symptoms

  • Relapse
  • dangerous behavior

Negative Symptoms

  • Greatest cause of long-term disability

★ marks the fact that sets a column apart.

Clinical Pearl

Positive = plus (something added that shouldn't exist). Negative = minus (something lost that should be there).

Component Topics

Schizophrenia

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