Studies indicate that different parts of the brain are responsible for different types of decisions. A research team led by Luca Franziska Kaiser and Prof. Dr. Gerhard Jocham from the HHU working group “Biological Psychology of Decision Making,” and Dr. Theo Gruendler together with colleagues in Magdeburg analyzed the balance of the messenger substances GABA and glutamate in two forms of decision-making. The background to the research was to find out how different concentrations of these substances influence the person making the decision.