Dopamine: Salience Processing

Salience is the significance assigned to an event or stimulus. It helps people decide what deserves attention and action. Dopamine contributes to this process, particularly in learning and responding to potentially important information. The aberrant-salience hypothesis proposes that inappropriate significance may contribute to psychotic experiences.

Dopamine is a neurotransmitter used by nerve cells to influence other cells through specific receptors. Its effects depend on the brain region, receptor subtype and timing of release. It contributes to movement, learning, motivation and hormone regulation, so describing it only as a pleasure chemical is misleading.

For example, an ordinary coincidence may feel unusually meaningful, prompting an explanation that becomes a delusional belief. This is a model connecting neurobiology with experience, not a complete account of every delusion. Threat, memory, culture and reasoning also shape interpretation. Antipsychotic treatment may reduce how compelling or urgent experiences feel before their meaning changes. Assessment should still explore the person’s actual concern and context. The hypothesis helps explain one possible process without establishing that every personally meaningful event or unusual interpretation indicates illness.

Salience is not the same as belief. A feeling that something is important may arise before a person explains why. The explanation draws on memory, expectations and context. This distinction connects biological models with psychological ones and helps explain why reducing the urgency of an experience may occur before the person revises the belief attached to it.

Further reading: Research record 31299229; Research record 25688430.