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Malik S, Ong Z. Is evoking fear effective? Exploratory findings from a randomised experiment on the impacts of health warning labels on sugar-sweetened beverages. Public Health Nutr 2023; 27:e42. [PMID: 38126272 PMCID: PMC10882526 DOI: 10.1017/s1368980023002859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
OBJECTIVE Health warning labels (HWL) have been suggested to be effective in reducing consumption of sugar-sweetened beverages (SSB). Yet, the efficacy and acceptability of SSB HWL of different formats (textual/pictorial) and severity remain unclear. This exploratory study aims to examine the extent and mechanism through which HWL of different formats and severity may affect responses towards the HWL and SSB consumption. DESIGN Randomised online experiment. Participants were exposed to images of a hypothetical SSB bearing a HWL of one of three conditions: text-only HWL, moderately severe pictorial HWL and highly severe pictorial HWL. They then responded to theory-based affective, cognitive and behavioural measures. SETTING Singapore. PARTICIPANTS One hundred and twenty-seven young adult consumers from a public university. RESULTS Direct effects were found for fear, avoidance, reactance and acceptability of the HWL, but not attitude, intention or motivation to consume less SSB. Pictorial (moderately severe and highly severe) HWL were associated with greater fear, avoidance, and reactance, and lower acceptability than text-only HWL. There was weak evidence that highly severe pictorial HWL resulted in greater reactance than moderately severe pictorial HWL. Fear mediated the effect of HWL of different severity levels on avoidance, reactance, intention and motivation, but not for attitude or acceptability. CONCLUSIONS Exploratory findings indicate that although pictorial HWL were less acceptable, they may still be effective in influencing intention and motivation to reduce SSB consumption through the psychological mechanism of fear. Hence, graphic HWL should not be dismissed too quickly when considering strategies for reducing SSB consumption.
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Affiliation(s)
- Shelly Malik
- Wee Kim Wee School of Communication and Information, Nanyang Technological University, 637718Singapore
| | - Zoe Ong
- Wee Kim Wee School of Communication and Information, Nanyang Technological University, 637718Singapore
- Global Asia, Interdisciplinary Graduate Programme, Nanyang Technological University, Singapore
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Clarke N, Ferrar J, Pechey E, Ventsel M, Pilling MA, Munafò MR, Marteau TM, Hollands GJ. Impact of health warning labels and calorie labels on selection and purchasing of alcoholic and non-alcoholic drinks: A randomized controlled trial. Addiction 2023; 118:2327-2341. [PMID: 37528529 PMCID: PMC10952514 DOI: 10.1111/add.16288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 05/29/2023] [Indexed: 08/03/2023]
Abstract
AIMS To estimate the impact on selection and actual purchasing of (a) health warning labels (text-only and image-and-text) on alcoholic drinks and (b) calorie labels on alcoholic and non-alcoholic drinks. DESIGN Parallel-groups randomised controlled trial. SETTING Drinks were selected in a simulated online supermarket, before being purchased in an actual online supermarket. PARTICIPANTS Adults in England and Wales who regularly consumed and purchased beer or wine online (n = 651). Six hundred and eight participants completed the study and were included in the primary analysis. INTERVENTIONS Participants were randomized to one of six groups in a between-subjects three [health warning labels (HWLs) (i): image-and-text HWL; (ii) text-only HWL; (iii) no HWL] × 2 (calorie labels: present versus absent) factorial design (n per group 103-113). MEASUREMENTS The primary outcome measure was the number of alcohol units selected (with intention to purchase); secondary outcomes included alcohol units purchased and calories selected and purchased. There was no time limit for selection. For purchasing, participants were directed to purchase their drinks immediately (although they were allowed up to 2 weeks to do so). FINDINGS There was no evidence of main effects for either (a) HWLs or (b) calorie labels on the number of alcohol units selected (HWLs: F(2,599) = 0.406, P = 0.666; calorie labels: F(1,599) = 0.002, P = 0.961). There was also no evidence of an interaction between HWLs and calorie labels, and no evidence of an overall difference on any secondary outcomes. In pre-specified subgroup analyses comparing the 'calorie label only' group (n = 101) with the 'no label' group (n = 104) there was no evidence that calorie labels reduced the number of calories selected (unadjusted means: 1913 calories versus 2203, P = 0.643). Among the 75% of participants who went on to purchase drinks, those in the 'calorie label only' group (n = 74) purchased fewer calories than those in the 'no label' group (n = 79) (unadjusted means: 1532 versus 2090, P = 0.028). CONCLUSIONS There was no evidence that health warning labels reduced the number of alcohol units selected or purchased in an online retail context. There was some evidence suggesting that calorie labels on alcoholic and non-alcoholic drinks may reduce calories purchased from both types of drinks.
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Affiliation(s)
- Natasha Clarke
- Behaviour and Health Research Unit, Department of Public Health and Primary CareUniversity of CambridgeCambridgeUK
- School of SciencesBath Spa UniversityBathUK
| | - Jennifer Ferrar
- School of Psychological Science, Tobacco and Alcohol Research GroupUniversity of BristolBristolUK
| | - Emily Pechey
- Behaviour and Health Research Unit, Department of Public Health and Primary CareUniversity of CambridgeCambridgeUK
| | - Minna Ventsel
- Behaviour and Health Research Unit, Department of Public Health and Primary CareUniversity of CambridgeCambridgeUK
| | - Mark A. Pilling
- Behaviour and Health Research Unit, Department of Public Health and Primary CareUniversity of CambridgeCambridgeUK
| | - Marcus R. Munafò
- School of Psychological Science, Tobacco and Alcohol Research GroupUniversity of BristolBristolUK
| | - Theresa M. Marteau
- Behaviour and Health Research Unit, Department of Public Health and Primary CareUniversity of CambridgeCambridgeUK
| | - Gareth J. Hollands
- Behaviour and Health Research Unit, Department of Public Health and Primary CareUniversity of CambridgeCambridgeUK
- EPPI Centre, UCL Social Research InstituteUniversity College LondonLondonUK
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Garaus M, Wolfsteiner E, Hu J. The unhealthy-tasty intuition in dining out situations: the role of health inferences and taste expectations. Front Nutr 2023; 10:1152114. [PMID: 37234554 PMCID: PMC10206271 DOI: 10.3389/fnut.2023.1152114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 04/19/2023] [Indexed: 05/28/2023] Open
Abstract
Introduction Increasing obesity rates around the globe have challenged policymakers to find strategies to prompt healthier eating habits. While unhealthy eating takes place in many different contexts, dining out is a context where individuals often choose an unhealthy option despite the availability of healthier alternatives. One possible explanation for this behavior is the unhealthy-tasty intuition, which refers to the belief that unhealthy food is tastier than healthy food. Nevertheless, many policymakers and restaurant managers follow the - in this context - counterintuitive approach of using health claims to nudge people towards more healthy eating choices or habits. Methods The current research employs an online experiment with 137 participants and investigates how health claims and sensory claims impact on the purchase intention of healthy options for desserts. Furthermore, it explores how health inferences and taste expectations mediate the intention to purchase. Results and discussion Findings from the online experiment confirm that health claims prompt positive health inferences, while also stimulating unfavorable taste expectations, resulting in a lower intention to purchase. Surprisingly, we found no effect of a sensory claim on taste expectations. The findings of our experiment contradict the unhealthy-tasty intuition by revealing a significant positive correlation between taste expectations and health inferences. While both health inferences and taste expectations impact positively on purchasing intentions for the health-claim condition, the indirect effect of taste expectations was stronger than the indirect effect of health inferences.
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Affiliation(s)
- Marion Garaus
- School of International Management, Modul University Vienna, Vienna, Austria
| | - Elisabeth Wolfsteiner
- Institute of Marketing, University of Applied Sciences Wiener Neustadt, Wiener Neustadt, Austria
| | - Jennifer Hu
- School of International Management, Modul University Vienna, Vienna, Austria
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Zou H, Wang H, Li J. Framed or Unframed? An empirical study of the impact of food brand logo frame on consumers' food preferences. Food Res Int 2023; 166:112602. [PMID: 36914326 DOI: 10.1016/j.foodres.2023.112602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 02/06/2023] [Accepted: 02/14/2023] [Indexed: 02/18/2023]
Abstract
Despite the widespread use of food brand logo frame in food brand logo cues, little is known about how food brand logo frame influences consumers' food preferences. Through five studies, this article explores the food brand logo frame on consumers' food preferences for different food types. For utilitarian foods, framed (vs unframed) food brand logos result in higher (lower) consumers' food preferences (Study 1), and this framing effect is driven by the psychological mechanism of food safety associations (Study 2); for hedonic foods, unframed (vs framed) food brand logos result in higher (lower) consumers' food preferences (Study 3), and this framing effect is driven by the psychological mechanism of food confinement associations (Study 4). Furthermore, this framing effect was also observed among UK consumers (Study 5). The findings contribute to the literature of brand logo and frame effect, as well as to the literature of food association, and bear important implications regarding food brand logo frame design for food marketers when developing food brand logo programs.
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Affiliation(s)
- Huan Zou
- Business School, Chengdu University of Technology, Chengdu, PR China
| | - Hong Wang
- Business School, Chengdu University of Technology, Chengdu, PR China.
| | - Jing Li
- Business School, Chengdu University of Technology, Chengdu, PR China
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5
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Masterton S, Jones A. Comparing the effects of inhibitory control training and evaluative conditioning for unhealthy food behaviours. Appetite 2023; 185:106529. [PMID: 36905990 DOI: 10.1016/j.appet.2023.106529] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 01/28/2023] [Accepted: 03/06/2023] [Indexed: 03/11/2023]
Abstract
Cognitive Bias Modification (CBM) is hypothesised to reduce unhealthy food preference and consumption through the completion of computerised cognitive training tasks. While there is evidence to suggest that two popular CBM paradigms (Inhibitory Control Training (ICT) and Evaluative Conditioning (EC)) can have a positive influence on food-related outcomes, issues (and inconsistencies) related to task standardisation and control group design make it difficult to evaluate their standalone efficacy. In a pre-registered laboratory study using a mixed experimental design, our aim was to directly compare a single session of ICT and EC on implicit preference, explicit choice and ad-libitum food intake, while ensuring appropriate active control groups were utilised for each training type (in addition to a passive control group). The results revealed that there were no significant differences in terms of implicit preferences, ad-libitum food consumption or food choice. These results provide limited evidence to support the use of CBM as a psychological intervention for unhealthy food choice or consumption. Further work is needed to isolate mechanisms of effect for successful training and identify the most effective CBM protocols for implementation in future studies.
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Affiliation(s)
- Sarah Masterton
- Department of Psychology, University of Liverpool, United Kingdom.
| | - Andrew Jones
- Department of Psychology, University of Liverpool, United Kingdom
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Hielkema MH, Onwezen MC, Reinders MJ. Veg on the menu? Differences in menu design interventions to increase vegetarian food choice between meat-reducers and non-reducers. Food Qual Prefer 2022. [DOI: 10.1016/j.foodqual.2022.104675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Zafar MZ, Shi X, Yang H, Abbas J, Chen J. The Impact of Interpretive Packaged Food Labels on Consumer Purchase Intention: The Comparative Analysis of Efficacy and Inefficiency of Food Labels. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph192215098. [PMID: 36429827 PMCID: PMC9690506 DOI: 10.3390/ijerph192215098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 11/08/2022] [Accepted: 11/11/2022] [Indexed: 05/12/2023]
Abstract
The objectives of this study are twofold. Firstly, the current study elucidates the impact and efficacy of food labels in developing consumers' attitudes and intentions towards the selection of nutritional food. Secondly, the inefficacy of labels in developing consumers' attitudes and intentions towards healthy packaged food selection is demonstrated. The supportive theories of the current model are those of reasoned action and protection motivation. The data of 797 respondents have been collected from four major grocery stores in Pakistan. The structural equation model has been employed for the analysis of data. The results indicate that the efficacy of food labels has a positive significant effect on attitudes towards familiar and unfamiliar foods. In contrast to this, inefficacy in labelling has shown a positive significant effect on familiar foods but is insignificant for unfamiliar foods. The user-friendly food labels significantly affect unfamiliar foods in terms promoting consumer attitudes. Reciprocally, the inefficacy of labels creates a hindrance to the reading of unfamiliar labels while purchasing food items. The study findings reveal the fact that food label information and its format influences consumer attitudes and intentions at the point of purchase.
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Affiliation(s)
| | - Xiangjiao Shi
- Business School, Shandong Jianzhu University, Jinan 250101, China
- Institute of Business Administration, Shandong University of Finance and Economics, Jinan 250014, China
| | - Hailan Yang
- Business School, Shandong Jianzhu University, Jinan 250101, China
| | - Jaffar Abbas
- School of Media and Communication & Antai College of Economics and Management, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jiakui Chen
- School of Economics and Management (Cooperative College), Qingdao Agricultural University, Qingdao 266109, China
- Correspondence:
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Application of Internet of Things Combined with Wireless Network Technology in Volleyball Teaching and Training. COMPUTATIONAL INTELLIGENCE AND NEUROSCIENCE 2022; 2022:8840227. [PMID: 35990157 PMCID: PMC9385343 DOI: 10.1155/2022/8840227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/17/2022] [Accepted: 06/25/2022] [Indexed: 12/05/2022]
Abstract
Motion information collection technology is a means for measuring, tracking, and recording the movement traces of individuals in space. This method can complete the data collection of volleyball players and the ball trajectory and realize quantification and statistical analysis of the data to present a virtual model of the player's movement trajectory. It is inseparable from the acquisition of information to complete the information collection. Therefore, this work uses the radio frequency identification (RFID) technology in the Internet of Things technology to build an information collection system and apply it to volleyball sports. The existing positioning system based on RFID has problems such as significant positioning errors and high system costs due to the arrangement of a large number of readers. This paper first introduces the theoretical knowledge of the RFID system, wireless network positioning technology, and RFID system positioning method in the Internet of Things. Besides, the theoretical framework of the volleyball movement information acquisition system is presented based on the Received Signal Strength Indication of the RFID system and Location Identification based on the Dynamic Active RFID Calibration (LANDMARC) algorithm. Then, the LANDMARC algorithm is improved through the Centroid Positioning algorithm, forming the CP-LANDMARC algorithm. Finally, a simulation experiment is conducted to test the system effect. The results demonstrate that: (1) the average error of the basic LANDMARC algorithm is 0.55 meters, and the average error of the CP-LANDMARC algorithm is 0.46 meters; (2) the average error of the CP-LANDMARC algorithm is 0.43 meters when the reference label is set to be evenly distributed in a square, and the average error of the optimized algorithm is 0.38 m when the reference label is set as an equilateral triangle; and (3) when the number of reference labels increases to 110, the average error decreases from 0.38 to 0.29. This paper aims to improve the quality of volleyball teaching and training by designing a relevant sports information acquisition system.
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Ventsel M, Pechey E, De-Loyde K, Pilling MA, Morris RW, Maistrello G, Ziauddeen H, Marteau TM, Hollands GJ, Fletcher PC. Effect of health warning labels on motivation towards energy-dense snack foods: Two experimental studies. Appetite 2022; 175:106084. [PMID: 35580820 PMCID: PMC9194909 DOI: 10.1016/j.appet.2022.106084] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 01/10/2022] [Accepted: 05/11/2022] [Indexed: 11/13/2022]
Abstract
Health warning labels (HWLs) show promise in reducing motivation towards energy-dense snack foods. Understanding the underlying mechanisms could optimise their effectiveness. In two experimental studies in general population samples (Study 1 n = 90; Study 2 n = 1382), we compared the effects of HWLs and irrelevant aversive labels (IALs) on implicit (approach) motivation towards unhealthy snacks, using an approach-avoidance task (Study 1), and a manikin task (Study 2). We also assessed explicit motivation towards unhealthy snacks using food selection tasks. We examined whether labelling effects on motivation arose from the creation of outcome-dependent associations between the food and its health consequences or from simple, non-specific aversive associations. Both label types reduced motivation towards snack foods but only when the label was physically present. HWLs and IALs showed similar effects on implicit motivation, although HWLs reduced explicit motivation more than IALs. Thus, aversive HWLs appear to act both through low level associative mechanisms affecting implicit motivation, and by additionally emphasizing explicit causal links to health outcomes thereby affecting explicitly motivated choice behaviours.
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Affiliation(s)
- Minna Ventsel
- Behaviour and Health Research Unit, Department of Public Health and Primary Care, University of Cambridge, Forvie Site, Robinson Way, CB2 0SR, Cambridge, UK.
| | - Emily Pechey
- Behaviour and Health Research Unit, Department of Public Health and Primary Care, University of Cambridge, Forvie Site, Robinson Way, CB2 0SR, Cambridge, UK
| | - Katie De-Loyde
- Tobacco and Alcohol Research Group, School of Psychological Science, University of Bristol, 12a Priory Road, BS8 1TU, Bristol, UK
| | - Mark A Pilling
- Behaviour and Health Research Unit, Department of Public Health and Primary Care, University of Cambridge, Forvie Site, Robinson Way, CB2 0SR, Cambridge, UK
| | - Richard W Morris
- Bristol Medical School, University of Bristol, 5 Tyndall Avenue, BS8 1UD, Bristol, UK
| | - Giulia Maistrello
- Department of Psychiatry, University of Cambridge, Douglas House, 18b Trumpington Rd, CB2 8AH, Cambridge, UK
| | - Hisham Ziauddeen
- Department of Psychiatry, University of Cambridge, Douglas House, 18b Trumpington Rd, CB2 8AH, Cambridge, UK; Cambridgeshire and Peterborough NHS Foundation Trust, Elizabeth House, CB21 5EF, Cambridge, UK; Wellcome Trust-MRC Institute of Metabolic Science - Metabolic Research Laboratories, Addenbrooke's Hospital, CB2 0QQ, Cambridge, UK
| | - Theresa M Marteau
- Behaviour and Health Research Unit, Department of Public Health and Primary Care, University of Cambridge, Forvie Site, Robinson Way, CB2 0SR, Cambridge, UK
| | - Gareth J Hollands
- Behaviour and Health Research Unit, Department of Public Health and Primary Care, University of Cambridge, Forvie Site, Robinson Way, CB2 0SR, Cambridge, UK; EPPI-Centre, UCL Social Research Institute, University College London, London, UK
| | - Paul C Fletcher
- Department of Psychiatry, University of Cambridge, Douglas House, 18b Trumpington Rd, CB2 8AH, Cambridge, UK; Cambridgeshire and Peterborough NHS Foundation Trust, Elizabeth House, CB21 5EF, Cambridge, UK; Wellcome Trust-MRC Institute of Metabolic Science - Metabolic Research Laboratories, Addenbrooke's Hospital, CB2 0QQ, Cambridge, UK.
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10
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‘Don't stop believing’: The role of training beliefs in cognitive bias modification paradigms. Appetite 2022; 174:106041. [DOI: 10.1016/j.appet.2022.106041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 11/15/2022]
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Clarke N, Blackwell AKM, De-Loyde K, Pechey E, Hobson A, Pilling M, Morris RW, Marteau TM, Hollands GJ. Health warning labels and alcohol selection: a randomised controlled experiment in a naturalistic shopping laboratory. Addiction 2021; 116:3333-3345. [PMID: 33861881 DOI: 10.1111/add.15519] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 12/15/2020] [Accepted: 04/07/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND AIMS Health warning labels (HWLs) on tobacco products reduce smoking. There is an absence of evidence concerning the impact of alcohol HWLs on selection or purchasing in naturalistic settings. Using a commercial-standard naturalistic shopping laboratory, this study aimed to estimate the impact on selection of alcoholic drinks of HWLs describing adverse health consequences of excessive alcohol consumption. DESIGN A between-subjects randomised experiment with three groups was conducted: group 1: image-and-text HWL; group 2: text-only HWL; group 3: no HWL. SETTING A commercial-standard naturalistic shopping laboratory in the United Kingdom. PARTICIPANTS Adults (n = 399, 55% female) over the age of 18 years, who purchased beer or wine weekly to drink at home. INTERVENTIONS Participants were randomised to one of three groups varying in the HWL displayed on the packaging of the alcoholic drinks: (i) image-and-text HWL (n = 135); (ii) text-only HWL (n = 129); (iii) no HWL (n = 135). Participants completed a shopping task, selecting items from a range of alcoholic and non-alcoholic drinks, and snacks. MEASUREMENT The primary outcome was the proportion of alcoholic drinks selected. Secondary outcomes included HWL ratings on negative emotional arousal and label acceptability. FINDINGS There was no clear evidence of a difference in the HWL groups for the percentage of drinks selected that were alcoholic compared to no HWL (44%): image-and-text HWL: 46% (odds ratio [OR] = 1.08, 95% confidence interval [CI] = 0.82, 1.42); text-only HWL: 41% (OR = 0.87, 95% CI = 0.67, 1.14). Concordant with there being no difference between groups, there was extreme evidence in favour of the null hypothesis (Bayes factor [BF] < 0.01). Negative emotional arousal was higher (P < 0.001) and acceptability lower (P < 0.001) in the image-and-text HWL group, compared to the text-only HWL group. CONCLUSIONS In a naturalistic shopping laboratory, there was no evidence that health warning labels describing the adverse health consequences of excessive alcohol consumption changed selection behaviour.
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Affiliation(s)
- Natasha Clarke
- Behaviour and Health Research Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Anna K M Blackwell
- Tobacco and Alcohol Research Group, School of Psychological Science, University of Bristol, Bristol, UK
| | - Katie De-Loyde
- Tobacco and Alcohol Research Group, School of Psychological Science, University of Bristol, Bristol, UK
| | - Emily Pechey
- Behaviour and Health Research Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Alice Hobson
- Behaviour and Health Research Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Mark Pilling
- Behaviour and Health Research Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | | | - Theresa M Marteau
- Behaviour and Health Research Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Gareth J Hollands
- Behaviour and Health Research Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
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