Approaches in Psychology AQA Practice Test 2026 - Free Psychology Practice Questions and Study Guide

The main idea here is matching neurotransmitters to the most widely taught roles they play in psychology. Dopamine is best known for its involvement in reward and motivation—the brain’s reinforcement system that drives us to seek out rewarding experiences. Serotonin is most closely linked to mood regulation and a sense of wellbeing, shaping how we feel overall.

That’s why this pairing is the strongest choice: it uses the classic, exam-friendly associations for these two chemicals—dopamine with reward and motivation, serotonin with mood and wellbeing. The other options mix in roles that are less central or that reflect secondary influences (for example, dopamine’s influence on sleep or serotonin’s role in digestion), which aren’t the primary, most straightforward links psychologists teach for these neurotransmitters.