Effect of Nudge Interventions in Real-World Kiosks on Consumer Beverage Choices to Promote Non-Sugar-Sweetened Beverage Consumption
Abstract
1. Introduction
2. Materials and Methods
2.1. Experiment Design
2.2. Kiosk Screen Configurations
2.3. Experimental Procedure
2.4. Participants
2.5. Survey Instrument
2.5.1. Demographic Profile and Baseline State
2.5.2. Beverage Kiosk Purchasing Behavior
2.5.3. Effect of Nudge Interventions in Beverage Kiosks
2.5.4. Perception, Attitude, and Intention Toward Non-SSBs
2.6. Data Analysis
3. Results
3.1. Demographic Characteristics of the Participants
3.2. Awareness and Impact of Beverage Kiosk Nudges
3.3. Perceptions of Beverage Kiosk Nudges
3.4. Comparison of Beverage Kiosk Purchases
3.5. Factors Influencing Non-Sugar-Sweetened Beverages
3.6. Influence of Dietary Behavior and Perception of Non-Sugar-Sweetened Beverages on Purchase Intention
4. Discussion
4.1. Strength
4.2. Limitation
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Abbreviations
SSBs | Sugar-sweetened beverages |
Non-SSBs | Non-sugar-sweetened beverages |
References
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Variable | N (%) |
---|---|
Sex | |
Male | 34 (18.7) |
Female | 148 (81.3) |
Marriage status | |
Married | 1 (0.05) |
Single | 181 (99.5) |
Household type | |
Single | 83 (45.6) |
Two-person | 10 (5.5) |
Three-person & over | 89 (48.9) |
Monthly income/Allowance (in KRW 10,000) | |
<20 | 5 (2.7) |
20–40 | 14 (7.7) |
40–60 | 48 (26.4) |
60–80 | 44 (24.2) |
80–100 | 23 (12.6) |
100–200 | 28 (15.4) |
>200 | 20 (11.0) |
Current weight management status | |
Trying to lose weight | 89 (48.9) |
Trying to maintain weight | 43 (23.6) |
Trying to gain weight | 10 (5.5) |
Not trying to gain or lose weight | 40 (22.0) |
Total (n = 182) | Single (Order) (n = 46) | Single (Variety) (n = 45) | Combination (Order, Variety) (n = 45) | F/P | Male (n = 34) | Female (n = 148) | t/p | |
---|---|---|---|---|---|---|---|---|
Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | |||
Awareness of kiosk differences | 3.14 ± 1.93 | 2.98 ± 1.78 a | 2.56 ± 1.83 a | 3.89 ± 1.97 b | 6.038 ** | 2.96 ± 2.09 | 3.18 ± 1.90 | −0.514 |
Impact of kiosk features on beverage choice | 3.62 ± 1.83 | 3.30 ± 1.76 | 3.76 ± 1.86 | 3.80 ± 1.85 | 1.030 | 2.76 ± 1.94 | 3.81 ± 1.75 | −2.487 * |
Total (n = 182) | Male (n = 34) | Female (n = 148) | t/p | Cohen’s d | |
---|---|---|---|---|---|
Mean ± SD | Mean ± SD | Mean ± SD | |||
Effectiveness of nudge in promoting healthier choice | 5.05 ± 1.58 | 4.27 ± 2.02 | 5.23 ± 1.41 | −3.303 ** | −0.623 |
Attitude toward nudges | 5.84 ± 1.16 | 5.29 ± 1.29 | 5.96 ± 1.09 | −3.089 ** | −0.593 |
Necessity of nudges | |||||
Single (order) | 5.53 ± 1.26 a | 5.27 ± 1.19 | 5.59 ± 1.27 a | −1.356 | −0.255 |
Single (variety) | 6.09 ± 1.05 b | 5.44 ± 1.50 | 6.24 ± 0.85 b | −4.198 *** | −0.799 |
Combination (order, variety) | 5.91 ± 1.08 b | 5.50 ± 1.33 | 6.00 ± 1.00 b | −2.494 * | −0.468 |
F | 11.835 *** | 0.281 | 14.671 *** | ||
Preference for nudges | |||||
Single (order) | 5.62 ± 1.29 a | 5.18 ± 1.45 | 5.72 ± 1.23 a | −2.254 * | −0.424 |
Single (variety) | 6.10 ± 1.15 b | 5.44 ± 1.54 | 6.26 ± 0.98 b | −3.874 *** | −0.743 |
Combination (order, variety) | 5.96 ± 1.10 b | 5.44 ± 1.28 | 6.08 ± 1.02 b | −3.135 ** | −0.597 |
F | 8.039 *** | 0.390 | 9.308 *** | ||
Desire for nudge implementation | |||||
Single (order) | 5.66 ± 1.29 a | 5.24 ± 1.71 | 5.76 ± 1.15 a | −2.155 * | −0.409 |
Single (variety) | 6.14 ± 1.14 b | 5.53 ± 1.59 | 6.28 ± 0.96 b | −3.600 *** | −0.680 |
Combination (order, variety) | 5.94 ± 1.17 b | 5.44 ± 1.56 | 6.05 ± 1.04 b | −2.803 ** | −0.529 |
F | 7.453 ** | 0.296 | 9.321 *** | ||
N (%) | N (%) | N (%) | χ2/p | ||
Most necessary nudge in beverage kiosk | 11.745 ** | ||||
Single (order) | 38 (20.9) | 10 (29.4) | 28 (18.9) | ||
Single (variety) | 72 (39.6) | 13 (38.2) | 59 (39.9) | ||
Combination (order, variety) | 70 (38.5) | 9 (26.5) | 61 (41.2) |
SSBs | Non-SSBs | χ2/p | |
---|---|---|---|
N (%) | N (%) | ||
Control (n = 46) | 17 (37.0) | 29 (63.0) | 0.407 |
Single (order) (n = 46) | 20 (43.5) | 26 (56.5) | |
Control (n = 46) | 17 (37.0) | 29 (63.0) | 0.670 |
Single (variety) (n = 45) | 13 (28.9) | 32 (71.1) | |
Control (n = 46) | 17 (37.0) | 29 (63.0) | 4.199 * |
Combination (order, variety) (n = 45) | 8 (17.8) | 37 (82.2) |
SSBs | Non-SSBs | χ2/p | |
---|---|---|---|
N (%) | N (%) | ||
Single (order) (n = 46) | 20 (43.5) | 26 (56.5) | 7.053 ** |
Combination (order, variety) (n = 45) | 8 (17.8) | 37 (82.2) | |
Single (variety) (n = 45) | 13 (28.9) | 32 (71.1) | 1.553 |
Combination (order, variety) (n = 45) | 8 (17.8) | 37 (82.2) |
Model | Independent Variable | B | SE | Wald | p | OR | 95% CI | ||
---|---|---|---|---|---|---|---|---|---|
LLCI | ULCI | ||||||||
Model (Adjusted) | Nudges | Single (order) | −0.294 | 0.434 | 0.458 | 0.499 | 0.745 | 0.318 | 1.746 |
Single (variety) | 0.361 | 0.454 | 0.632 | 0.426 | 1.435 | 0.589 | 3.497 | ||
Combination (order, variety) | 1.022 | 0.504 | 4.113 | 0.043 * | 2.780 | 1.035 | 7.468 | ||
Sex | Female | 0.822 | 0.399 | 4.230 | 0.040 * | 2.274 | 1.039 | 4.976 | |
Thirst | 0.053 | 0.145 | 0.134 | 0.714 | 0.688 | 0.794 | 1.401 |
Dependent Variable | Independent Variable | B | SE | β | t(p) | TOL | VIF |
---|---|---|---|---|---|---|---|
Intention to purchase non-SSBs | (Constant) | 1.334 | 0.352 | 3.787 | |||
Liking for non-SSBs | 0.376 | 0.057 | 0.436 | 6.610 *** | 0.567 | 1.764 | |
Attitude toward non-SSBs | 0.399 | 0.075 | 0.334 | 5.293 *** | 0.620 | 1.613 | |
Checking sugar content in processed foods | 0.078 | 0.032 | 0.131 | 2.452 ** | 0.868 | 1.152 | |
F(p) = 75.572 ***, R2 = 0.560, adj. R2 = 0.553 |
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Moon, S.; Chung, S.-j.; Oh, J. Effect of Nudge Interventions in Real-World Kiosks on Consumer Beverage Choices to Promote Non-Sugar-Sweetened Beverage Consumption. Nutrients 2025, 17, 2524. https://doi.org/10.3390/nu17152524
Moon S, Chung S-j, Oh J. Effect of Nudge Interventions in Real-World Kiosks on Consumer Beverage Choices to Promote Non-Sugar-Sweetened Beverage Consumption. Nutrients. 2025; 17(15):2524. https://doi.org/10.3390/nu17152524
Chicago/Turabian StyleMoon, Suah, Seo-jin Chung, and Jieun Oh. 2025. "Effect of Nudge Interventions in Real-World Kiosks on Consumer Beverage Choices to Promote Non-Sugar-Sweetened Beverage Consumption" Nutrients 17, no. 15: 2524. https://doi.org/10.3390/nu17152524
APA StyleMoon, S., Chung, S.-j., & Oh, J. (2025). Effect of Nudge Interventions in Real-World Kiosks on Consumer Beverage Choices to Promote Non-Sugar-Sweetened Beverage Consumption. Nutrients, 17(15), 2524. https://doi.org/10.3390/nu17152524