An exploratory consumer study of 3D printed food perception in a real-life military setting

3D printing has the potential to produce on-demand food tailored to individuals’ needs and preferences. The present study explored 3D printed food acceptance in a real-life military setting. Over a period of 4 weeks, soldiers consumed and evaluated multiple recovery snack bars. In week 1, participants received a benchmark bar that was created with conventional manufacturing processes. In week 2 to 4 participants received a 3D printed snack bar with increasing customisation options: choice of texture (soft or crunchy) in week 2; choice of texture and taste (sweet or savoury) in week 3; and choice of texture, taste and ingredients (4 types of dough, 13 types of filling) in week 4. Attitudes towards 3D food printing and potential drivers of 3D printed food acceptance were assessed in weeks 1 and 4 before and after repeated consumption of the snack bars.After repeated consumption participants judged 3D printed food to be significantly better as compared to before consumption (t = 2.86, p = 0.015). Food neophobia, food technology neophobia and food choice motives did not change during the experiment (all p > 0.05). The benchmark bar was liked better than the 3D printed bars. However, among the 3D printed bars, mean scores on overall liking, and liking of taste and texture were highest for the version that was customized most (week 4). Our findings illustrate that consumer empowerment, desired degree of personalisation, state of development and appropriateness of 3D food printing technology all play a role in 3D printed food acceptance.     

Understanding meat consumption in later life: A segmentation of older consumers in the EU

Protein intake is important for the maintenance of health, independence, and quality of life especially for older adults, yet the expanding older population is at risk of not consuming adequate levels. Notwithstanding its importance in terms of health, dietary protein choice has major ramifications for the state of the environment and for climate change, with meat holding the most weight in the environmental impact of diets. To support older consumers in making environmentally sustainable dietary protein choices, this study aims to gain deeper understanding of older consumers’ meat consumption behavior by profiling older consumer segments on the basis of their meat consumption and liking. Results were obtained through a 2019-survey among 2,500 community-dwelling older adults aged 65 years or above in Finland, Poland, Spain, the Netherlands, and the United Kingdom. Three segments of older consumers were identified by means of a two-step cluster analysis: heavy meat consumers, medium meat consumers, and light meat consumers. The segments differed significantly in several socio-demographics and background characteristics, appetite, protein intake, attitudes towards meat and plant-based ‘meat’ substitutes, and liking of protein sources other than meat. Health and sustainability food choice motives were important determinants for being classified as a medium or light meat consumer compared to a heavy meat consumer whereas food fussiness, sensory appeal, and familiarity were important determinants for being classified as a heavy meat consumer compared to a light meat consumer. Understanding older consumers’ meat consumption behavior has important implications for designing dietary strategies to meet older consumers’ protein needs in an environmentally sustainable way.     

Food4Me study: Validity and reliability of Food Choice Questionnaire in 9 European countries

This analysis has been conducted to explore the validity and reliability of the Food Choice Questionnaire (FCQ) across 9 European countries. Variation in the factor structure and the perceived importance of food choice motives have been compared cross-nationally. Volunteers (N = 9381) were recruited from an existing panel of a social research agency to take part in the Food4Me survey in Germany, Greece, Ireland, Poland, Portugal, Spain, the Netherlands, the UK and Norway. The survey was administered on-line. Configural, metric and scalar invariance fell within acceptable limits and were consistent across the 9 countries. All reliability parameters were above acceptable levels. Factor analysis confirmed that all items loaded onto the same 9 factors established by Steptoe and Pollard (1995). There was highly significant agreement in the relative importance of food choice factors between countries. Price was ranked as most important food choice factor in five countries (Spain, Greece, Ireland, Portugal and the Netherlands), sensory appeal was ranked first for three countries (Norway, Germany and the UK) while natural content was ranked as the most important factor in Poland. Familiarity and ethical concern were consistently ranked as least important in all countries. These data suggest that the FCQ is a suitable tool for exploring food choice motives across different European populations. Differences in relative importance of factors within countries may need to be taken into account in dietary health intervention and food product development.     

Alternative protein sources in Western diets: Food product development and consumer acceptance of spirulina-filled pasta

Spirulina (Arthrospira platensis) is currently being increasingly researched for its usability and suitability in human nutrition. The inclusion of alternative protein sources, such as spirulina, in familiar products is a possible strategy to nudge consumers towards dietary change in Western societies. Filled pasta variants with three levels of spirulina-soy-extrudate in the filling (10%, 30% or 50%) were developed and investigated for their sensory characteristics and consumer liking. Recipe development was based on the concepts of flavor-flavor learning (beet-ginger or tomato) and masking (lemon-basil) to account for the musty and earthy notes of the alga. Consumer tests were conducted in Germany (n = 139), the Netherlands (n = 137) and France (n = 144), and conventional sensory profiling was accomplished with trained panelists (n = 12). Consumers preferred the lemon-basil flavor over tomato and beet-ginger flavored fillings. As expected, liking decreased with increased extrudate content, regardless of the flavor. For all flavors expected liking was higher than liking after product exposure; for the lemon-basil flavor the gap was the smallest. It was shown that low general food neophobia and familiarity with spirulina promoted consumer liking. The sensory profiling revealed that the spirulina-soy-extrudate content affected all sensory attributes identified across all flavors, but for the tomato flavor the most. Overall, this study confirms that it is important to consider differences in consumer motivation as well as the product’s conceptual and intrinsic sensory characteristics in new product development.     

An exploratory study of sensory attributes and consumer traits underlying liking for and perceptions of freshness for ready to eat mixed salad leaves in Italy

The role of sensory attributes and storage time information in driving liking for and perceptions of freshness for ready to eat vegetables was investigated in mixed salad leaves for different storage times (0, 3, 7 and 9 days). A modified Repertory Grid Method was used to identify ten attributes describing consumer's perception of sensory properties over storage. Eighty-one consumers rated the overall liking, the intensity of sensory attributes and the level of freshness in salad samples at different storage times. Freshness was evaluated in blind and informed conditions. Furthermore, consumers filled in a Food Choice Questionnaire and rated the importance of six attributes known to be important for ready to eat salad choice. The relationships between sensory properties significantly affected by storage time, perceived freshness and liking showed that both liking and freshness were positively related to appearance attributes (green colour, salad assortment and leaf turgidity). The perceived level of freshness, expiry date and appearance were confirmed as the most important attributes for ready to eat salad choice. Two clusters of consumers (Cl1: n = 49; Cl2: n = 32) were identified based on the mean liking rating. The positive effects on health and mood as well as ethical concerns drove food choice more in Cl1 than in Cl2 subjects. No significant effect of storage time was found on liking ratings expressed by Cl1 in blind conditions, while a significant decrease of perceived freshness was observed. On the other hand, results from Cl2 in blind conditions showed a significant decrease of both liking and perceived freshness. Information about storage time significantly affected freshness ratings in Cl1 but did not influence those from Cl2.Results suggest that collection of sensory data, affective responses and information about the background of subjects is needed to fully investigate the perceptions of freshness from a consumer perspective.     

The consumer acceptance of novel vegetable-enriched bread products as a potential vehicle to increase vegetable consumption

Currently UK fruit and vegetable intakes are below recommendations. Bread is a staple food consumed by approximately 95% of adults in western countries. In addition, bread provides an ideal matrix by which functionality can be delivered to the consumer in an accepted and convenient food. Therefore, enriching bread with vegetables may be an effective strategy to increase vegetable consumption. This study evaluated bread enriched with red beetroot, carrot with coriander, red pepper with tomato or white beetroot (40 g vegetable per 100 g) compared to white control bread (0 g vegetable) for consumer acceptance. Consumers (n = 120) rated their liking of the breads overall, as well as their liking of appearance, flavour and texture using nine-point hedonic scales. Product replacement and purchase intent of the breads were rated using five-point scales. The effect of providing consumers with health information about the breads was also evaluated. There were significant differences in overall liking (P < 0.0001), as well as liking of appearance (P < 0.0001), flavour (P = 0.0002) and texture (P = 0.04), between the breads. However, the significant differences resulted from the red beetroot bread which was significantly (P < 0.05) less liked compared to control bread. There were no significant differences in overall liking between any of the other vegetable-enriched breads compared with the control bread (no vegetable inclusion). The provision of health information about the breads did not increase consumer liking of the vegetable-enriched breads. In conclusion, this study demonstrated that vegetable-enriched bread appeared to be an acceptable strategy to increase vegetable intake, however, liking depended on vegetable type.     

Sensory profiles and consumer acceptability of a range of sugar-reduced products on the UK market

Current UK intake of non-milk extrinsic sugars (NMES) is above recommendations. Reducing the sugar content of processed high sugar foods through reformulation is one option for reducing consumption of NMES at a population level. However, reformulation can alter the sensory attributes of food products and influence consumer liking. This study evaluated consumer acceptance of a selection of products that are commercially-available in the UK; these included regular and sugar-reduced baked beans, strawberry jam, milk chocolate, cola and cranberry & raspberry juice. Sweeteners were present in the reformulated chocolate (maltitol), cola (aspartame and acesulfame-K) and juice (sucralose) samples. Healthy, non-smoking consumers (n = 116; 55 men, 61 women, age: 33 ± 9 years; BMI: 25.7 ± 4.6 kg/m²) rated the products for overall liking and on liking of appearance, flavor and texture using a nine-point hedonic scale. There were significant differences between standard and reduced sugar products in consumers' overall liking and on liking of each modality (appearance, flavor and texture; all P < 0.0001). For overall liking, only the regular beans and cola were significantly more liked than their reformulated counterparts (P < 0.0001). Cluster analysis identified three consumer clusters that were representative of different patterns of consumer liking. For the largest cluster (cluster 3: 45%), there was a significant difference in mean liking scores across all products, except jam. Differences in liking were predominantly driven by sweet taste in 2 out of 3 clusters. The current research has demonstrated that a high proportion of consumers prefer conventional products over sugar-reduced products across a wide range of product types (45%) or across selected products (27%), when tasted unbranded, and so there is room for further optimization of commercial reduced sugar products that were evaluated in the current study. Future work should evaluate strategies to facilitate compliance to dietary recommendations on NMES and free sugars, such as the impact of sugar-reduced food exposure on their acceptance.     

Headspace volatiles contributing to flavour and consumer liking of wellness beverages

The relationships between volatile composition, sensory profile and liking of four Finnish wellness beverages were determined. Wellness beverages are finely carbonated nutritionally fortified functional drinks and are a fast growing product category in many countries. The aroma compounds of wellness beverages were extracted by solid phase microextraction and analysed by a gas chromatography–mass spectrometer. The purpose of this experiment was to identify the sensory and chemical quality characters required for a positive hedonic response. The effect of consumers’ health concerns on liking was also studied. This paper demonstrates that ethyl hexanoate, α-pinene, 3-hexenol, and hexyl acetate contribute to citrus-like and fresh odours and increase the liking of wellness beverages. On the other hand, 2-heptanone, which correlated with the calcium content, creates an off-flavour that is not pleasant for the consumer. Consumers who were more concerned about their health rated the wellness beverages as more pleasant.     

How personality traits and intrinsic personal characteristics influence the consumer's choice of reduced-calorie food

Nowadays, the consumption of low-calorie foods is being taken into account as a tool for reducing the incidence of certain nutrition-related health disorders. In this context, several factors were used to model low-fat (LF), low-sugar (LS) and high-calorie (HC) food consumption behavior. These factors were: personality traits (neuroticism and conscientiousness), food choice motives (health and weight control) and intrinsic personal characteristics such as self-esteem and satisfaction with life. The results indicate a good fit for the proposed model. Weight control was the best predictor of consumption of this kind of product, and health was a less strong predictor. In addition, correlations between the constructs indicated that LF and LS had the strongest correlation with each other and with weight control (p < 0.01). Surprisingly, the correlation between health and LF and LS product consumption was low. As regards differences in gender, women showed more concern about weight control, as expected.     

Considering the application of a mixed reality context and consumer segmentation when evaluating emotional response to tea break snacks

Emotional response is dependent on context and the individual. Increasingly consumer scientists are collecting emotional response data as it gives deeper insights over liking concerning engagement with food products. This research investigated the impact of context on consumer emotional response to tea-break snacks across different context including the use of mixed-reality. It also aimed to determine if consumers can be segmented according to their patterns of emotional response as opposed to liking. Consumers (n = 120) evaluated two tea-break snacks across three different contexts (sensory booth, evoked mixed-reality café, real life café) using a rate-all-that-apply EsSense 25 questionnaire. Cluster analysis reduced the 25 emotional terms to a more manageable nine categories of emotional response for data analysis. Using those categories, three emotion-based segments of tea-break snack consumers were identified. One emotionally disengaged, and two positively engaged but at different levels of intensity and for different attributes. For most consumers, mixed-reality evoked similar emotional responses and discrimination between the snacks as the real café suggesting it is a useful technique for evaluating ecologically valid consumer response. Responses in the sensory booths were different. This, suggests including context in consumer emotional response data collection is important. Furthermore, this research suggests that researchers should consider including context within consumer testing that involves emotional response and that mixed-reality serves as a promising approach to do this. It also highlights that average consumer emotional responses are unlikely to be representative and that segmenting consumers according to their emotional response will reveal deeper insights into product response.     

Effect of branched-chain fatty acids, 3-methylindole and 4-methylphenol on consumer sensory scores of grilled lamb meat

Tenderness, flavour, overall liking and odour are important components of sheepmeat eating quality. Consumer assessment of these attributes has been made for carcasses from the Information Nucleus Flock (INF) of the Cooperative Research Centre for Sheep Industry Innovation. The concentrations of three branched chain fatty acids, 4-methyloctanoic (MOA), 4-ethyloctanoic (EOA) and 4-methylnonanoic acids (compounds related to ‘mutton flavour’ in cooked sheepmeat) and 3-methylindole and 4-methylphenol (compounds related to ‘pastoral’ flavour) were determined for 178 fat samples taken from INF carcasses. Statistical modelling revealed that both MOA and EOA impacted on the ‘Like Smell’ consumer sensory score of the cooked meat product (P < 0.05), with increasing concentration causing lower consumer acceptance of the product. None of the compounds though had an effect on the liking of flavour. Obviously, reducing the effect of MOA and EOA on the odour of grilled lamb will improve consumer acceptance of the cooked product but other factors affecting the eating quality also need to be considered.     

Consumers’ attitudes towards alternative grains: a conjoint analysis study

Recently, alternative grains (millet, quinoa, sorghum) have been used to produce several food products common to North Americans. The objective of this study was to identify the attributes that drive consumers liking of alternative grains. A literature review and two focus groups were conducted. Four attributes were identified as being important to consumers when purchasing alternative grains. These attributes included grains, product type, flavour and claims. A choice- based conjoint analysis survey was created and administered to 346 individuals who live in Atlantic Canada. Product type and flavour were the most important attributes to consumers. Sweet and nutty flavours, products made from quinoa, or products with claims indicating they were a source of fibre, reduced risk of type 2 diabetes or reduced risk of cardiovascular disease, had a positive effect on consumer liking.     

Salty taste in dairy foods: can we reduce the salt?

Sodium can be found in many sources of the US diet. Dietary guidelines currently suggest a maximum intake of 2,300 mg of sodium (6 g of sodium chloride) per day, whereas the average consumer intake is 3,600 mg of sodium (9 g of sodium chloride) per day. The main health concern with high consumption of sodium is hypertension. The objectives of this study were to identify the salty taste intensity of sodium chloride in water and various dairy food matrices, and to identify the just-noticeable difference in concentration at which consumers noticed a decrease in salty taste in these food products. Solutions and food products (water, cheese sauce, cottage cheese, and milk-based soup) were prepared with sodium chloride ranging in concentration from 0.008 to 0.06 M. Seventeen panelists evaluated the salty intensity of each product in triplicate using a magnitude estimation scale. In subsequent tests, panelists (n = 50) evaluated salty intensity of these food products in separate sessions using an ascending force choice method to determine the just-noticeable difference. Consumer acceptance tests (n = 75 consumers) were conducted with cottage cheeses with and without sodium reductions and under conditions with and without health benefits of sodium reduction. The magnitude estimation scale data were log-transformed, and all data were analyzed by ANOVA with Fisher's least significant difference for means separation. The linear proportion of the power function in the salty taste intensity curve for sodium chloride solutions and the 3 foods was between 0.03 and 0.20 M. Consumers were able to notice and correctly identify reductions in salt concentration of less than 20% in all products. When consumers were informed of sodium reduction and its health benefits before tasting cottage cheese with lower sodium (4-12%), overall liking scores for the lower sodium cottage cheeses were not different from higher sodium cottage cheeses. These results suggest that reducing sodium in cheese sauce, cottage cheese, and milk-based soups may be challenging and that exploration of sodium chloride alternatives in these foods is warranted. Appropriate product positioning or advertising may be beneficial to consumer acceptance of lower sodium types of products.     

The influence of sensory and packaging cues on both liking and emotional,abstract and functional conceptualisations

Thomson et al. (2010) have argued that the key to unlocking the mystery of consumer choice is to assess and measure the ‘meanings’ consumers attach in their minds to the product, which can be referred to as conceptualisations. Conceptualisations can be reduced to three broad categories: emotional, abstract and functional (Thomson et al., 2010). However, little data is available to understand how sensory attributes and packaging cues of a product evoke conceptualisations. The objectives of this study were to: (i) derive emotional, abstract and functional conceptualisation lexicons for a commercial product category; (ii) measure how these conceptualisations, and liking, change across blind, package and informed conditions; (iii) test the hypothesis that abstract/functional conceptualisations are more strongly associated with extrinsic product cues; and, finally (iv) explore the effect of package derived conceptualisations on liking and conceptualisations scores derived from product consumption experience. A lexicon to describe the conceptualisations associated with commercial blackcurrant squash was developed by consumers (n = 29). A larger group of consumers (n = 100) were then asked to assess their conceptual response to eleven squashes under three conditions: blind, pack and informed using Check-All-That-Apply (CATA). The findings of the study revealed that intrinsic product characteristics have more association with emotions whereas extrinsic product characteristics were more associated with abstract/functional conceptualizations. In addition, the results of the study also showed how package derived conceptualisations influenced the liking score and conceptualisations frequencies between blind and informed conditions in a small number of products. However, a more systematic experimental design is needed to further investigate the hypotheses that follow from the results obtained in this study.     

Providing a food choice option increases children’s liking of fish as part of a meal

Fish consumption in Norway is lower than currently recommended by health authorities. Parents report various barriers to fish consumption, including children’s dislike of and avoidance to choose fish and resulting family conflicts. Often children are served one main meal option. However, giving children a choice between two types of meals with fish may increase liking of fish.The aim of this study was to experimentally investigate the effect of choice possibility on liking evaluation of fish by children.Two groups of children (n = 131) were compared: group 1 (n = 76) without a choice possibility for a fish dish (cod or salmon) and group 2 (n = 55), with a choice possibility between cod and salmon dishes. The experiment took place in a canteen where children evaluated liking of the fish in the dish. Children also reported preferences, consumption frequency and psychosocial development characteristics.Giving children a choice between the cod and salmon dishes led to a more positive liking evaluation of the fish in the dish. Children with developed choice ability reported lower liking evaluations for fish in a dish they were given without a choice possibility. General liking of fish increased liking evaluations whether the children were given a choice possibility or not.These results may be explained by a positive bias the children have towards choices they make, especially when they believe they are able to be more autonomous. These results indicate that children may learn to like fish more if they are included in the process of deciding what to have for dinner.     

The effect of age,gender and noise sensitivity on the liking of food in the presence of background noise

The liking of food in the presence of background noise has been associated with the noise type and level. So far, however, there have been few studies investigating the non-acoustic factors associated with food perception in the presence of background noise. This study investigated the food liking due to three non-acoustic factors (i.e. gender, noise sensitivity and age) in the presence of background noise, relative to the ambient background noise (i.e. no noise conditions). Fifteen participants rated the liking of food via questionnaires. The perceptual relative food liking due to age, gender and noise sensitivity at different noise types and levels were presented. The results indicated that age, noise sensitivity and gender influence relative food liking. Females had lower liking ratings of food than males (p = 0.038). Noise sensitivity was also negatively correlated with the relative liking of food (r = −0.72, p < 0.001). Sensitive participants gave lower relative food liking ratings (p = 0.023). The older participants also gave lower relative food liking ratings (p = 0.01). A better understanding of acoustic and non-acoustic factor effects on food perception can be an important area of interest in noise management of dining areas. These results also provide an opportunity for future practical and educational applications. These include a better service that could be presented from food providers and more practical acoustic design of dining areas to suit different groups of people.     

The influence of product- and person-related factors on consumer hedonic responses to soy products

Consumers in Western countries increasingly appreciate health benefits of soy products. However, several barriers prevent full acceptance of these products. This study investigates the effects of product-related factors (perceived familiarity and expected healthiness) and person-related factors (food neophobia and health interest) on consumer hedonic responses to various soy products. In the pre-study, 48 German-speaking participants assessed the perceived familiarity, healthiness and tastiness for 21 soy products. In the main study, four soy products that differed in familiarity and healthiness were presented to German consumers (n = 327) as images supplemented by product names and slogans stressing either health or taste benefits. Participants rated their attitudes towards the product, product liking, taste expectations and willingness to try the products in a 2 (familiar or unfamiliar products) × 2 (healthy or tasty products) × 2 (low or high food neophobia) between-subject design. As hypothesized, neophilic consumers showed more positive responses to soy products compared to neophobic consumers. Neophobics showed more positive responses to familiar soy products, whereas the responses of neophilics were not influenced by product familiarity. Health interest positively influenced the willingness to try soy products. However, the effect of healthiness manipulation on hedonic responses to experimental products was not significant. The results of the study suggest that perceived familiarity might be more important for acceptance of soy products than expected healthiness. Successful marketing strategies for soy products should target neophobic consumers by increasing the level of familiarity of soy foods.     

Influence of packaging information on consumer liking of chocolate milk

Chocolate milk varies widely in flavor, color, and viscosity, and liking is influenced by these properties. Additionally, package labels (declared fat content) and brand are some of the extrinsic factors that may influence consumer perception. The objective of this study was to evaluate the effects of packaging labels and brand name on consumer liking and purchase intent of chocolate milk. A consumer acceptance test, conjoint analysis survey, and Kano analysis were conducted. One hundred eight consumers evaluated 7 chocolate milks with and without brand or package information in a 2-d crossover design. A conjoint analysis survey and Kano analysis were conducted after the consumer acceptance test. Results were evaluated by 2-way ANOVA and multivariate analyses. Declared fat content and brand influenced overall liking and purchase intent for chocolate milks to differing degrees. A subsequent conjoint analysis (n = 250) revealed that fat content was a driver of choice for purchasing chocolate milk followed by sugar content and brand. Brand name was less important for purchase intent of chocolate milk than fat or sugar content. Among fat content of chocolate milk, 2 and 1% fat level were most appealing to consumers, and reduced sugar and regular sugar were equally important for purchase intent. Kano analysis confirmed that fat content (whole milk, 1, or 2% fat chocolate milk) was an attractive attribute for consumer satisfaction, more so than brand. Organic labeling did not affect the purchase decision of chocolate milk; however, Kano results revealed that having an organic label on a package positively influenced consumer satisfaction. Findings from this study can help chocolate milk producers as well as food marketers better target their product labels with attributes that drive consumer choice of chocolate milk.     

The independent and combined impact of front-of-pack labelling and sensory quality on calorie estimations and portion selection of commercial food products

Front-of-Pack (FOP) health and nutrition labels are intended to help consumers make better food choices, but labels that infer a product is ‘healthier’ than it is have been linked to increased consumption. Three studies were set up to assess whether a product’s sensory characteristics counteract label-generated biases in calorie estimation and portion selection across two product categories: soymilk and instant noodles. Participants in Study 1 (n = 116, 21–50 years) evaluated a range of popular FOP labels. Relative to a control, participants were willing to pay more for products with added labels, and estimated “healthier choice” and “reduced sugar/MSG” versions to have fewer calories per portion. Participants also selected larger portions of the “healthier choice” products. Participants in Study 2 (n = 48, 21–50 years) evaluated 10 different soymilks and 10 instant noodles in the absence of any labelling information. Increased taste intensity was linked to higher estimated calorie content, increased liking and larger portion selection. Study 3 (n = 94, 21–50 years) combined these factors to test the impact of “healthier choice” and “reduced” sugar/MSG labeling applied to products varying in sensory intensity. Label-generated beliefs that a product was healthier and contained fewer calories persisted regardless of how the product tasted, while portion decisions were primarily guided by sensory intensity. Although FOP health and nutrient labels can bias consumer judgements, portion selection may be based more on the sensory experience of eating. Findings suggest modifying a product’s sensory intensity could be more influential at shaping portion decisions than labelled health messages.