Picture this: the role of mental imagery in induction of food craving - a theoretical framework based on the elaborated intrusion theory

摘要

Purpose - This paper aims to explore the influence of four types of imagery stimuli (i.e. visual, olfactory, gustatory and auditory) on food craving intensity based on the Elaborated Intrusion theory and the central role of mental imagery in the food craving experience. The roles of overall perception of sensory imagery attributes and perceived availability in moderating this process were also tested. The aim is to extract the positive aspects of food cravings by increasing them and shifting them toward healthy foods. Design/methodology/approach - In an online experiment, 314 participants were randomly primed with each imagery condition. After being exposed to either healthy or unhealthy food pictures, participants completed a questionnaire measuring their craving state, trait food craving, imaging ability, BMI, dietary restraint, hunger and mood. At the end, the impact of food craving intensity on marketing outcomes (i.e. willingness to pay, price sensitivity and food intake) were tested. Findings - As predicted, visual imagery was found to be the strongest stimulus inducing food craving followed by olfactory, gustatory and auditory stimuli. Furthermore, the results indicate that perceived availability of food is the only important variable moderating this process. Additionally, the results show that hunger makes consumers more susceptible to food cravings than mood. Moreover, food craving intensity showed significant impact on the two marketing outcomes: willingness to pay and food intake. Research limitations/implications - First, the authors used a cheeseburger as unhealthy food and salad as healthy food, future studies can increase the generalizability of the findings by using other types of food. Second, physiological and psychological disorders should be considered and studied as influential factors on food cravings in future studies. Third, future studies should include some behavioral measures besides the analysis of state and trait craving. Fourth, although the main objective of this study was to compare the effect of different imagery stimuli on consumers' food craving, there was no control (no-stimulus) condition. Practical implications - Marketing strategists may benefit from the fact that encouraging consumers to visualize some specific type of food product along with informing them about its availability will elevate their craving for that food product. Hence, using this strategy in shopping environments could be beneficial. In the context of improving people's diet, our results showed that encouraging people to visualize healthy foods (e.g. fruits and vegetables) might be more helpful than priming them with the benefits of eating healthy. Originality/value - There has been a recent enthusiastic interest in identifying the role of food related mental imagery and stimuli in consumers' decision making and their final consumption (Christian ef al., 2016). Nevertheless, very few studies in marketing have paid attention to these underpinning stimuli driving food craving and the significant influence of this food craving phenomenon on marketing outcomes.