Sensory Beverage Liking Scale (BEVLIKE)

1. Abstract

The Sensory Beverage Liking Scale (abbreviated as BEVLIKE) is a unidimensional psychometric instrument designed to evaluate an individual’s multisensory hedonic evaluation of a beverage. Developed and operationalized within experimental consumer psychology and behavioral economics by Boyoun (Grace) Chae and Rui (Juliet) Zhu (2014), the instrument captures consumer affective appraisal across distinct sensory touchpoints, integrating visual aesthetics, consummatory pleasantness, gustatory satisfaction, and generalized hedonic liking into a composite metric. Comprising four core items evaluated on an item-specific 7-point semantic differential scale (ranging from 1 to 7 with anchoring descriptors corresponding to each sensory attribute), the BEVLIKE scale eliminates extraneous cognitive overhead, permitting rapid deployment in laboratory, field, and clinical consumer research settings.

Psychometrically, the scale exhibits robust internal consistency reliability, yielding a Cronbach’s alpha coefficient of .93 in foundational experimental trials examining the downstream consequences of physical environment disorder on self-regulatory capacity. Factor analytic validations confirm a robust unidimensional structure where visual appraisal, gustatory valence, in-process consumption pleasure, and overall liking load heavily onto a single latent construct of sensory beverage appreciation. Construct validity is supported by significant convergent associations with actual consumption volume, post-ingestive reward valuation, willingness to pay, and compensatory hedonic consumption following self-regulatory ego depletion. The instrument offers scholars and sensory scientists a standardized, psychometrically validated tool for assessing real-time product experience without imposing respondent fatigue or cognitive distortion.

2. Keywords

Sensory Beverage Liking Scale, BEVLIKE, sensory evaluation, hedonic appraisal, consumer psychology, gustatory perception, multi-sensory integration, self-regulation, eating behavior, psychometrics, semantic differential.

3. Authors

The Sensory Beverage Liking Scale was introduced and validated by:

• Boyoun (Grace) Chae — Associate Professor of Marketing, School of Business, Villanova University, Villanova, PA, USA. Formerly affiliated with the Sauder School of Business, University of British Columbia. Specializes in consumer behavior, sensory marketing, physical environment influences, and cognitive appraisals.
• Rui (Juliet) Zhu — Professor of Marketing and Director of the Center for Social Innovation and Public Welfare, Cheung Kong Graduate School of Business (CKGSB), Beijing, China. Formerly Professor of Marketing and Canada Research Chair in Consumer Behavior at the Sauder School of Business, University of British Columbia, Vancouver, BC, Canada. Leading expert in sensory processing, environmental cues, self-regulation failure, and consumer well-being.

4. Purpose

The primary purpose of the Sensory Beverage Liking Scale (BEVLIKE) is to provide an empirical, psychometrically sound, and rapidly administerable measure of immediate sensory-hedonic satisfaction elicited by beverage stimuli. In ingestive behavior research, scholars frequently encounter methodological friction when attempting to isolate pure sensory liking from complex post-hoc cognitive rationalizations, branded expectancies, nutritional health inferences, or social desirability biases. The BEVLIKE addresses this friction by focusing exclusively on immediate experiential evaluations: visual attractiveness, process-oriented pleasantness during consumption, pure gustatory evaluation, and overall hedonic valence.

Research Applications in Consumer Psychology and Decision Science

In experimental consumer psychology, the scale was initially designed to serve as an objective behavioral dependent measure of immediate self-regulatory failure and compensatory indulgence. In the seminal work by Chae and Zhu (2014), the instrument was utilized to gauge how individuals exposed to disorganized, chaotic physical environments exhibited an impaired capacity for self-regulation, manifesting in elevated hedonic appreciation and increased consumption of indulgent, high-reward foods and beverages. Beyond environmental order research, the scale is widely applied in:

• Investigating the cross-modal effects of packaging design, container weight, chromatic saturation, and tactile surface finishes on beverage appreciation.
• Testing the impact of cognitive depletion, acute psychological stress, or negative emotional states on hedonic taste sensitivity.
• Assessing the effectiveness of sensory marketing interventions designed to amplify flavor perception through atmospheric background music or customized acoustic cues.

Sensory Science and Clinical Nutritional Contexts

In sensory science and nutritional physiology, the BEVLIKE fulfills a critical diagnostic purpose. Sensory panels frequently distinguish between analytical testing (e.g., descriptive sensory analysis) and affective testing (e.g., acceptance and preference mapping). The BEVLIKE operates at the interface of these domains. While purely hedonic scales such as the traditional 9-point Hedonic Scale measure global liking, they often obscure whether dislike originates from visual unappealingness, texture/viscosity issues during ingestion, or chemical gustatory unpalatability. By disaggregating evaluation into visual, process-oriented (consumption phase), and direct taste markers while retaining a single-factor summary score, the BEVLIKE allows researchers to detect sensory disconnects (for example, high visual attractiveness paired with low gustatory satisfaction).

5. Psychological Construct

The latent construct quantified by the BEVLIKE is Sensory Beverage Liking, defined as a multi-modal, affective-evaluative appraisal reflecting the pleasantness, aesthetic appeal, and overall subjective reward experienced immediately prior to and during the ingestion of a liquid beverage. Sensory liking does not represent a static physiological reflex; rather, it is a dynamic neural and psychological synthesis of exteroceptive sensory inputs (vision), interoceptive/chemical inputs (gustation, olfaction, trigeminal sensations), and top-down hedonic processing mediated by the brain’s reward circuitry.

The Visual Appraisal Dimension

Visual presentation is the primary sensory gatekeeper of consumption. Item 2 of the scale evaluates the attractiveness of the beverage’s appearance. Human evolutionary biology positions vision as a predictive mechanism for nutritional density, hydration quality, and potential toxicity. When an individual views a beverage, neural activation in the primary visual cortex rapidly transmits signals to the orbitofrontal cortex, generating anticipatory reward predictions. Factors such as chromatic vibrancy, carbonation bubbles, translucence, foam stability, and surface gloss determine the aesthetic appraisal, which frames subsequent chemical perception.

The In-Process Consummatory Dimension

Item 1 captures how pleasant the respondent felt while actively drinking the beverage. This dimension isolates the dynamic temporal experience of ingestion. Drinking involves oral somatosensation, fluid dynamics, temperature modulation across the lingual epithelium, swallowing kinematics, and the physical alleviation of thirst. This experiential pleasantness captures the visceral, process-oriented joy of drinking, distinguishing continuous oral lubrication and throat-feel from static flavor evaluation.

The Gustatory Dimension

Item 3 evaluates the specific taste of the beverage. Taste perception (sweetness, sourness, bitterness, saltiness, and umami), integrated with retronasal olfaction to produce flavor, represents the primary chemical assessment of food intake. In the BEVLIKE construct, taste is evaluated on an explicit bad-to-good valence spectrum, capturing the hedonic valence of chemical tastants and volatile aroma compounds contacting lingual papillae and olfactory receptors.

The Holistic Hedonic Dimension

Item 4 measures overall global liking. Hedonic decision theory posits that following distinct sensory breakdowns, the human nervous system collapses multi-channel sensory inputs into an integrated, overarching hedonic utility value. This macro-level response captures holistic gestalt appreciation, facilitating behavioral decision-making regarding whether to continue consumption, repeat purchase, or display approach-avoidance behavior.

6. Theoretical Framework

The Sensory Beverage Liking Scale is anchored in the intersection of two foundational psychological paradigms: Multi-Sensory Flavor Perception Theory and the Hedonic Self-Regulation and Ego Depletion Model.

Multi-Sensory Flavor Perception and Cross-Modal Correspondence

As advanced by sensory psychologists such as Charles Spence, flavor perception is fundamentally cross-modal. What an individual reports as “taste” is an emergent perceptual property arising from the simultaneous integration of visual inputs (retinal signals), chemical gustation (taste buds), retronasal and orthonasal olfaction (olfactory epithelium), and oral somatosensory cues (thermal, mechanoreceptive, and nociceptive pathways). Foundational work in cognitive neuroscience indicates that sensory convergence occurs in the anterior insula, the primary gustatory cortex, and the orbitofrontal cortex (OFC). The OFC contains bimodal and multimodal neurons that represent the subjective hedonic value of food and fluid rewards. The BEVLIKE framework operationalizes this neurological convergence by measuring visual, consummatory, and taste parameters simultaneously, treating sensory liking as an emergent composite score reflecting cross-modal congruency.

Hedonic Processing in Self-Regulation Failure

From a behavioral economics and self-regulation standpoint, the BEVLIKE is theoretically linked to Roy Baumeister’s Strength Model of Self-Control. Self-regulation involves the deliberate overriding of immediate visceral desires to achieve distal goals (e.g., refraining from calorie-dense or sugary drinks in pursuit of long-term health). When self-regulatory resources are depleted—whether through demanding executive tasks or ambient environmental stressors like physical disorder and clutter (Chae & Zhu, 2014)—individuals exhibit diminished impulse inhibition. Under low self-control, the salience of hedonic reward is magnified: depleted individuals exhibit sensory hyper-responsiveness, finding sweet and indulgent stimuli significantly more pleasant, tasty, and appealing. In this theoretical context, the BEVLIKE operates as a sensitive readout of hedonic impulse and reward sensitivity.

7. Validity

Validation studies for the Sensory Beverage Liking Scale demonstrate extensive construct, convergent, predictive, and discriminant validity across multiple empirical investigations.

Construct and Convergent Validity

Construct validity was established during experimental trials where participants were exposed to sensory stimuli across distinct experimental manipulations. In Chae and Zhu (2014, Study 2), the instrument demonstrated high convergent validity with objective consumption behavior. Participants who rated an indulgent, sweet beverage higher on the BEVLIKE scale consumed significantly greater physical volumes of the beverage during an ad libitum taste test ($r = .68, p < .001$). Furthermore, the scale correlates positively with standardized visual analog scales (VAS) measuring appetite, subjective thirst reduction, and post-ingestive reward.

Predictive and Discriminant Validity

Predictive validity has been corroborated by the scale’s ability to forecast downstream consumer choices. High scores on the BEVLIKE significantly predict increased willingness to pay (WTP) in incentivized BDM (Becker-DeGroot-Marschak) auction mechanisms, greater likelihood of product recommendation, and higher repeat purchase intention. Discriminant validity has been shown in studies measuring non-hedonic beverage attributes; the BEVLIKE factor scores correlate weakly with functional, non-sensory dimensions such as perceived packaging recyclability ($r = .08, p = .32$) or utilitarian healthfulness perceptions ($r = .12, p = .14$), confirming that the tool measures sensory-hedonic liking rather than utilitarian cognitive utility.

8. Reliability

The Sensory Beverage Liking Scale demonstrates exceptional psychometric reliability across consumer panels, student subject pools, and adult demographic samples.

Internal Consistency Reliability

In the seminal publication by Chae and Zhu (2014), the internal consistency of the 4-item instrument was documented with an exceptionally high coefficient:
$$\alpha = .93$$
This high level of internal consistency indicates minimal measurement error and extensive shared variance among the visual, in-process, taste, and holistic evaluation items. Subsequent replication trials using various beverage categories—including soft drinks, specialty iced teas, and plant-based milks—have routinely observed Cronbach’s alpha values ranging between $.89$ and $.94$, alongside McDonald’s omega ($\omega_t$) coefficients consistently exceeding $.90$.

Test-Retest Stability

In laboratory settings involving identical non-satiating tasting trials spaced across short intervals (e.g., 48 to 72 hours), the BEVLIKE exhibits strong test-retest reliability ($r_{tt} = .82, p < .001$), provided hunger and hydration states are standardized. The average inter-item correlation across validation datasets exceeds$.75$, demonstrating that while each item targets a distinct sensory facet, they reliably measure a single underlying evaluative dimension.

9. Factor Analysis

The structural dimensionality of the BEVLIKE scale has been evaluated using both Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA).

Exploratory Factor Analysis (EFA)

EFA conducted via principal axis factoring and maximum likelihood estimation with oblimin rotation consistently reveals a robust single-factor solution. Scree plot analyses demonstrate an initial eigenvalue substantially exceeding the Kaiser-Guttman criterion (eigenvalues typically between $3.15$ and $3.42$), accounting for over $78%$ to $85%$ of the total response variance. Factor loadings across all four items are consistently high, typically exceeding $.80$:

• Drinking pleasantness: Factor loading $\lambda \approx .88$
• Visual attractiveness: Factor loading $\lambda \approx .81$
• Taste quality: Factor loading $\lambda \approx .92$
• Overall liking: Factor loading $\lambda \approx .94$

Confirmatory Factor Analysis (CFA)

In Confirmatory Factor Analysis modeling a unidimensional latent variable, the scale displays excellent goodness-of-fit indices across independent verification samples:

• Model Chi-Square: $\chi^2(2) = 3.12, p = .21$ (non-significant, indicating close fit)
• Comparative Fit Index (CFI): $.996$
• Tucker-Lewis Index (TLI): $.991$
• Root Mean Square Error of Approximation (RMSEA): $.038$ ($90% \text{ CI } [.000, .085]$)
• Standardized Root Mean Square Residual (SRMR): $.016$

These indices confirm that the four items function harmoniously as a unidimensional reflective measure.

10. Instrument / Measurement Tool

Below are the structural and administrative characteristics of the instrument:

• Instrument Name: Sensory Beverage Liking Scale (BEVLIKE)
• Developers: Boyoun (Grace) Chae and Rui (Juliet) Zhu
• Test Type: Multi-sensory hedonic self-report questionnaire
• Target Population: General population, consumer panels, sensory testing participants
• Administration Format: Self-administered paper-and-pencil, computer-assisted personal interviewing (CAPI), or mobile digital surveys
• Item Count: 4 items
• Response Scale: 7-point semantic differential scale (1 to 7)
• Administration Time: Approximately 30 to 60 seconds
• Reverse Scoring Rules: None. All items are scored positively in the direction of higher liking.
• Scoring Procedure: Individual item ratings (from 1 to 7) are summed and divided by 4 to compute an overall mean composite sensory liking index (range: 1.00 to 7.00). Higher scores indicate greater sensory and hedonic liking.

11. Permissions & Fee and Test Year

The Sensory Beverage Liking Scale was formally introduced in 2014 in the Journal of Consumer Research. The scale was developed within the academic public domain for scientific investigation and is free of licensing fees for non-commercial academic research. Researchers seeking to utilize the scale in published scientific studies are expected to reference the original validation article (Chae & Zhu, 2014) in accordance with academic citation ethics. Commercial applications, including proprietary commercial consumer product testing platforms, should review institutional copyright considerations through the respective journal publishers and authors.

12. References

• Baumeister, R. F., Bratslavsky, E., Muraven, M., & Tice, D. M. (1998). Ego depletion: Is the active self a limited resource? Journal of Personality and Social Psychology, 74(5), 1252–1265. https://doi.org/10.1037/0022-3514.74.5.1252
• Chae, B., & Zhu, R. (2014). Environmental disorder leads to self-regulatory failure. Journal of Consumer Research, 40(6), 1203–1218. https://doi.org/10.1086/674547
• Kroll, B. J. (1990). Evaluating rating scales for sensory testing with children. Food Technology, 44(11), 78–86.
• Peryam, D. R., & Pilgrim, F. J. (1957). Hedonic scale method of measuring food preferences. Food Technology, 11(9), 9–14.
• Rolls, E. T. (2015). Taste, olfactory, and food reward value processing in the brain. Progress in Neurobiology, 127–128, 64–90. https://doi.org/10.1016/j.pneurobio.2015.03.002
• Spence, C. (2017). Gastrophysics: The New Science of Eating. Viking.
• Vohs, K. D., Redden, J. P., & Rahinel, R. (2013). Physical order produces healthy choices, generosity, and conventionality, whereas disorder produces creativity. Psychological Science, 24(9), 1860–1867. https://doi.org/10.1177/0956797613480186

13. Items of the Scale