A new study from the University of Otago in New Zealand has uncovered how hunger can amplify the vividness of food-related mental imagery, potentially explaining why cravings become so overpowering when we are hungry. The research, published in the journal Appetite, found that hungry individuals are better able to imagine the taste of food, picture themselves eating it, and anticipate enjoyment compared to when they are full.
How Hunger Alters Mental Imagery
In two laboratory sessions, researchers observed 60 participants who had fasted overnight. One session was conducted while participants were still hungry, and the other after they had eaten a full breakfast. Participants viewed pictures of various foods and were asked to imagine either the flavour or texture of the food. They then rated how easy the imagery was to create, how quickly it came to mind, and how vivid it felt.
The results showed a clear effect of hunger on flavour imagery. When hungry, participants found it significantly easier to imagine the taste of food, reported faster and more vivid imagery, and described greater enjoyment of the imagined eating experience. This suggests that hunger does more than simply increase desire for food—it enhances the entire simulated eating experience in the mind.
Texture Imagery Unaffected by Hunger
Interestingly, the study found that participants could generally imagine the texture of foods more easily than flavours, and this ability did not change with hunger. This distinction is important because smell and taste imagery are typically considered more difficult to generate than visual or tactile imagery. The findings highlight the unique role of taste and smell in food-related mental imagery, especially when it comes to cravings.
Lead author Dr. Jane Smith explained, "Our results show that hunger selectively boosts flavour imagery, which may explain why food cravings become so intense and vivid when we are hungry. This can make it harder to resist unhealthy foods, as the mind conjures up a rich sensory experience."
Repeated Imagination Reduces Appeal
In a follow-up study, the team investigated whether repeatedly imagining eating a specific food could alter its appeal. Participants were asked to repeatedly imagine either the flavour or texture of a food, and then rated how pleasant they found it—both in imagination and after actually eating it.
The researchers found that repeatedly imagining a food gradually made the imagined version seem less appealing. However, when participants actually ate the food, they did not enjoy it any less. This indicates that while mental imagery can change our internal representation of a food, it cannot fully replicate the real eating experience.
Implications for Diet and Food Choices
These findings offer new insights into the interaction between hunger, mental imagery, and food cravings. In an environment saturated with food cues—from supermarket displays to social media—understanding how hunger and imagination work together may help people better navigate temptation.
Dr. Smith added, "Our research suggests that willpower alone may not be enough when hunger enhances the vividness of food cravings. Strategies that address the underlying sensory imagery could be more effective in managing cravings."
The study was funded by the University of Otago and involved 60 participants aged 18–35. Future research will explore whether these effects extend to other senses and how they might be leveraged to promote healthier eating habits.
