Individuals’ food preferences, recognized as pivotal factors influencing dietary behaviours (Macht, 2008; Singh, 2014), are shaped not only by the palatability of food itself but also by its inherent attributes, including color, aroma, and taste (Pérez-Rodrigo et al., 2003). Furthermore, food preferences are one of the most important factors in disordered eating (French et al., 1994). Thus, exploring the food preferences and their influence factors may pave the way for healthy eating.
Food preferences can be influenced by internal psychological factors and external factors (Tao et al., 2016; Wardle & Cooke, 2008). Music, as an external factor that impacts individuals’ food preferences, is increasingly being valued by individuals. Music has also been shown to influence human emotions, cognition, and behaviours (Guedes et al., 2023a), This suggests a potential connection between music and food (J. Wang et al., 2022). A recent meta-analysis found that music was positively related to food intake (Cui et al., 2021). Previous studies focused on basic auditory elements like volume, rhythm, and pitch to explore the effect of music on eating behaviours (Peng-Li et al., 2021a). Some studies have reported that lower (vs. higher) volume (Biswas, Szocs, et al., 2019) and higher (vs. lower) pitched music increased people’s preferences for healthy foods (Huang & Labroo, 2020). However, the influence of complex musical features on food choice and eating behavior is much more diverse (Spence et al., 2019). Music style, with its various components including pitch, rhythm, timbre, and complexity, offers researchers new insights. For example, Fiegel et al. (2014) found jazz music more accurately predicts participants’ preference for high-calorie emotional foods (e.g., milk chocolate) compared to hip-hop or rock music. This finding suggests jazz music may promote the intake of high-calorie foods. Background music’s impact on food preference depends on the interplay between music style and food health, for instance, listening to jazz and classical music increases preference for healthy salty foods (e.g., vegetable sandwiches) (Motoki et al., 2022). The influence of background music on overall impression was present in the emotional food, but not in the non-emotional food. This is because music genre can alter flavor pleasantness and overall impression of food stimuli. For example, classical and jazz music pieces are close to the “reflective and complex” dimension (e.g., tender longing, amazement, spirituality, and peace), whereas rap music pieces are likely to be attributed to the “energetic and rhythmic” dimension (e.g., activation)(Rentfrow & Gosling, 2003; Zentner et al., 2008). The current research presents conflicting findings regarding whether jazz music promotes high or low-calorie food choices. This discrepancy arises due to different perspectives and approaches in previous studies. Furthermore, the underlying neural mechanisms behind this phenomenon have not been thoroughly explored.
With the advancement in living standards, sustenance has transcended its mere physiological function, evolving into a vessel of culture and artistry, bestowing joy and fulfilling individuals' spiritual yearnings. Likewise, music, as a form of artistic expression, holds a pivotal role in catering to emotional and cultural aspirations. Hence, when music and cuisine converge to satiate the soul, a profound interconnection emerges between the two(Y. Wang, 2022). In retail stores and restaurants, background music is a common element (Spence et al., 2019). Consumers often choose, evaluate and consume food or drinks under the influence of music (Spence & Shankar, 2010). Multiple studies have shown that the rhythm of background music can affect consumers’ purchasing behavior and eating speed. For example, faster music rhythms can promote consumers’ purchasing behavior (Caldwell & Hibbert, 2002) and speed up eating speed (Milliman, 1986). Additionally, background music can also influence people’s different preferences or choices for food. However, many other kinds of music genres have been studied (e.g., Blues, Folk, Country, Religious, and Electronica; see Helwig & Palmer, 2018;Levitan et al., 2015; Kantono et al., 2016a, 2016b). Certain ethnic melodies, such as French or Japanese compositions, have the potential to influence individuals towards making nutritious or indulgent culinary selections. The Japanese cultural heritage, for instance, is linked to the perception of wholesome eating practices (Areni & Kim, 1993; Dobrenova et al., 2015). Immersing oneself in Japanese music could evoke a health-conscious frame of mind, consequently guiding individuals towards healthier dietary preferences. Notably, when music is played at a lower volume, individuals tend to lean towards healthier food options. For instance, research has shown that when the volume is decreased, individuals tend to opt for healthier food choices (Biswas, Lund, et al., 2019; Biswas, Szocs, et al., 2019). Classical music has been associated with reducing individuals' consumption of salty foods (Hussain et al., 2021). Conversely, studies indicate that patrons are more inclined to consume larger quantities of food in eateries playing classical or jazz music as opposed to pop music or no background music (North et al., 2003). The propensity for individuals to spend more money or purchase pricier items when classical music is played (Areni & Kim, 1993; North et al., 2003), combined with the notion that healthy foods typically command higher prices than high-calorie options (Haws et al., 2017), suggests that classical music may align with the attributes associated with low-calorie foods. Consequently, various music genres can influence individuals' eating habits and food consumption patterns. Moreover, different types of music can impact emotional responses and approach-avoidance behaviors (Mehrabian & Russell, 1974), thereby influencing the perception and acceptance of food when presented under different musical backgrounds (Fiegel et al., 2014).
Presently, there exists conflicting research regarding the impact of music on food preferences. While some studies suggest that genres like jazz and classical music could heighten individuals' inclination towards high-calorie foods (Fiegel et al., 2014), others indicate that exposure to classical music may actually lead individuals to opt for healthier, low-calorie food choices (Hussain et al., 2021). This inconsistency in findings could be attributed to various factors, including the diversity of music genres studied, variations in experimental methodologies, and individual variances among participants.
Event-related potential (ERP) studies have revealed that both early (N1 and N2) and late (P3) components are sensitive to the processing of food cues (Jing et al., 2024a). Early ERPs, such as occipital N1 occurring at 150–200 ms, have shown sensitivity to food type, reflecting early attention towards food stimuli (Meule et al., 2013; Schwab et al., 2017). An increase in N2 magnitude, signifying enhanced inhibitory control towards high-calorie foods, has been linked to higher self-reported mean calorie and carbohydrate intake. This suggests that individuals with lower efficiency in mobilizing inhibitory control resources are more prone to consuming a greater number of calories (Carbine et al., 2017a)
The N2 component, characterized by a negative deflection and stimulus reactivity, exhibits a greater amplitude when more conflicts are detected (Botvinick et al., 2001; Clayson & Larson, 2013). Individuals with music training have been found to display larger N2 amplitudes (Hao et al., 2023). Moreover, soothing and cheerful music have been shown to regulate negative emotions and reduce N2 amplitude (X. Liu et al., 2021). Interestingly, one study indicated that inhibitory responses to high-calorie stimuli elicited larger N2 amplitudes, while inhibitory responses to low-calorie stimuli resulted in smaller N2 amplitudes (Carbine et al., 2017b). Research has demonstrated that N2 amplitudes were greater during exposure to rap music compared to jazz music (Jing et al., 2024a). A decrease in N2 response strength may indicate weakened inhibitory control (Y. Liu et al., 2019)
Furthermore, the N450 component, characterized by a frontal-central slow wave around 500ms post-stimulus onset, has been observed to be larger in incongruent trials compared to other trial types, suggesting its involvement in inhibition processes during word processing suppression (West & Alain, 1999). Some researchers have proposed that the N450 serves as a measure of response conflict, as it is enhanced only under conditions of high conflict, such as with rare incongruent trials (Tillman & Wiens, 2011). Studies involving ERP responses in food-related conflict tasks have shown a reduction in N2 and N450 response strength in overweight Chinese females (Y. Liu et al., 2019).
The variation in P2 amplitude is contingent on the stimulus value (Sänger, 2019). In a study by Liu et al. (Y. Liu et al., 2020) involving food no-go and flower no-go tasks, overweight individuals exhibited higher P2 amplitudes compared to normal-weight individuals in both tasks. Nijs et al. (Nijs et al., 2010) reported that an escalation in P2 amplitude among obese participants indicates a heightened bias towards food-related stimuli. Conversely, Hachl et al. (Hachl et al., 2003) discovered that food intake leads to a reduction in P2 amplitude in individuals following a restricted diet. Stockburger et al. (2008) instructed participants to passively view a series of images, including both food and non-food items, revealing that hungry individuals displayed elevated P2 amplitudes compared to satiated participants.
Food cues have been linked to increased frontocentral P3 and N2 ERP amplitudes in comparison to neutral or less appetizing food cues, indicating heightened recruitment of inhibitory control and conflict monitoring resources (Carbine, Rodeback, et al., 2018). P3 amplitudes were found to be greater for food cues compared to non-food cues, reflecting a bias towards food cues (Wu et al., 2018). In contrast to normal-weight adolescents, overweight/obese individuals exhibited similar P3 amplitudes for both high- and low-calorie foods, with the most pronounced event-related alpha band desynchronization observed for low-calorie stimuli. Additionally, P3 amplitudes and state craving for low-calorie foods were predictive of snack intake in this group (Biehl et al., 2020). The response strength of P3 and the late positive component (LPC) was enhanced (Y. Liu et al., 2019).
In summary, individuals with weak inhibitory control and feelings of hunger displayed higher P2 amplitudes. The presentation of food cues elicited increased P3 and N2 amplitudes, reflecting the engagement of inhibitory control and conflict monitoring resources.
Prior research has predominantly concentrated on the influence of fundamental music parameters on food preferences (Huang & Labroo, 2020; Peng-Li et al., 2021b; Quekel, 2016), and the classification of food preferences has focused on either calorie or taste alone (Guedes et al., 2023b; Huang & Labroo, 2020; Quekel, 2016). There was significant heterogeneity in the literature, as experimental tasks, stimuli, and examined ERP components varied widely across studies.
Building upon the existing research gap, this study integrates Jing et al.(2024b) combined music genre categories (i.e., classical, rock, jazz, and rap) with food calorie information, employing event-related potentials (ERPs) analysis to explore the influence of music genres on food preferences. Through a modified food choice task, the current study aims to uncover the neural mechanisms underpinning food preference genres posits that individuals demonstrate a preference for high-calorie foods across all music genres, with classical music specifically prompting a greater selection of low-calorie options. It is suggested that the impact of music on food choices may manifest through alterations in the amplitude of EEG components.