Although salivation increased significantly over time, perhaps due to the exposure to and intake of food during the conditioning procedure, there were no differences in this increase with regard to the CS+ and CS− between the two mood conditions. When looking at the figure depicting salivary responses, it is interesting to note that there is some indication that participants in the negative mood condition displayed increased salivation in response to both the CS+ and CS−, whereas participants in the neutral mood condition showed such a response only when presented with the CS+. Why participants in a negative mood would show increased salivation in response to the CS− is unclear, especially considering the conditioned expectations to eat and the learned desire to eat that were both found in the negative mood condition. The inhibited salivary response to the CS− in the neutral mood condition would indicate that they have learned that the CS− would not be followed by food intake. The negative mood condition, on the other hand, did not show evidence of inhibited salivation to the CS−. In anticipation of more research on this topic, it could be that a negative mood generally leads to increased salivation, and that this general response is stronger than a conditioned inhibitory response. The few existing findings on mood states influencing salivation are mixed. Bulik, Lawson, and Carter (1996) reported a negative association between depression levels and salivation, while studies on the relationship between anxiety or stress and salivation have shown an increase (Rohleder, Wolf, Maldonado, & Kirschbaum, 2006), a decrease (Bates & Adams, 1968) or no salivary changes (Ben-Aryeh et al, 1985 and Bulik et al, 1996). With our negative mood manipulation we cannot be sure exactly what kind of negative emotions we tapped into and how this might have influenced salivary responding