1
|
Tufano M, Lasschuijt M, Chauhan A, Feskens EJM, Camps G. Capturing Eating Behavior from Video Analysis: A Systematic Review. Nutrients 2022; 14:nu14224847. [PMID: 36432533 PMCID: PMC9697383 DOI: 10.3390/nu14224847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 11/10/2022] [Accepted: 11/11/2022] [Indexed: 11/19/2022] Open
Abstract
Current methods to detect eating behavior events (i.e., bites, chews, and swallows) lack objective measurements, standard procedures, and automation. The video recordings of eating episodes provide a non-invasive and scalable source for automation. Here, we reviewed the current methods to automatically detect eating behavior events from video recordings. According to PRISMA guidelines, publications from 2010-2021 in PubMed, Scopus, ScienceDirect, and Google Scholar were screened through title and abstract, leading to the identification of 277 publications. We screened the full text of 52 publications and included 13 for analysis. We classified the methods in five distinct categories based on their similarities and analyzed their accuracy. Facial landmarks can count bites, chews, and food liking automatically (accuracy: 90%, 60%, 25%). Deep neural networks can detect bites and gesture intake (accuracy: 91%, 86%). The active appearance model can detect chewing (accuracy: 93%), and optical flow can count chews (accuracy: 88%). Video fluoroscopy can track swallows but is currently not suitable beyond clinical settings. The optimal method for automated counts of bites and chews is facial landmarks, although further improvements are required. Future methods should accurately predict bites, chews, and swallows using inexpensive hardware and limited computational capacity. Automatic eating behavior analysis will allow the study of eating behavior and real-time interventions to promote healthy eating behaviors.
Collapse
Affiliation(s)
- Michele Tufano
- Division of Human Nutrition and Health, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
- Correspondence:
| | - Marlou Lasschuijt
- Division of Human Nutrition and Health, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Aneesh Chauhan
- Wageningen Food and Biobased Research, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Edith J. M. Feskens
- Division of Human Nutrition and Health, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Guido Camps
- Division of Human Nutrition and Health, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
- OnePlanet Research Center, Plus Ultra II, Bronland 10, 6708 WE Wageningen, The Netherlands
| |
Collapse
|
2
|
Schneider E, Dourish CT, Higgs S. Utility of an experimental medicine model to evaluate efficacy, side-effects and mechanism of action of novel treatments for obesity and binge-eating disorder. Appetite 2022; 176:106087. [PMID: 35588993 DOI: 10.1016/j.appet.2022.106087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 02/22/2022] [Accepted: 05/12/2022] [Indexed: 11/02/2022]
Abstract
Obesity and Binge Eating Disorder (BED) are prevalent conditions that are associated with increased risk of morbidity and mortality. There is evidence that the use of pharmacotherapy alongside behavioural treatments can improve quality of life and reduce disease risk for patients with these disorders. However, there are few approved drug therapies for obesity, and these are limited by poor efficacy and/or side effects and only one drug has been approved for the treatment of BED. There is considerable potential to use experimental medicine models to identify new drug treatments for obesity and BED, with greater efficacy and an improved side effect profile, at an early stage of development. Here, we present a model developed in our laboratory that incorporates both behavioural and neuroimaging measures which can be used to facilitate drug development for obesity and BED. The results from validation studies conducted to date using our model suggest that it is sensitive to the effects of agents with behavioural, neurophysiological and neuropharmacological mechanisms of action known to be associated with weight loss and reductions in binge eating. Future studies using the model will be valuable to evaluate the potential efficacy and side-effects of new candidate drugs at an early stage in the development pipeline for both obesity and BED.
Collapse
Affiliation(s)
- Elizabeth Schneider
- School of Psychology, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom.
| | - Colin T Dourish
- P1vital Ltd, Howbery Park, Wallingford, OX10 8BA, United Kingdom; P1vital Products Ltd, Howbery Park, Wallingford, OX10 8BA, United Kingdom
| | - Suzanne Higgs
- School of Psychology, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
| |
Collapse
|
3
|
Presseller EK, Patarinski AGG, Fan SC, Lampe EW, Juarascio AS. Sensor technology in eating disorders research: A systematic review. Int J Eat Disord 2022; 55:573-624. [PMID: 35489036 DOI: 10.1002/eat.23715] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 04/02/2022] [Accepted: 04/03/2022] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Sensor technologies offer exciting potential to objectively measure psychopathological correlates of eating pathology and eating disorder (ED) research utilizing sensors has rapidly proliferated in the past several years. The aims of the present review are: (1) characterize the types of sensors that have been utilized in ED research, (2) identify the psychopathological factors relevant to EDs that have been assessed using sensors, (3) describe the data supporting the validity and reliability of these sensors, (4) discuss limitations associated with these sensors, and (5) identify gaps that persist within the ED literature with regard to use of sensor technologies. METHOD A systematic search was conducted of PubMed, PsycINFO, Web of Science, ProQuest, and "gray" literature sources. Eligible publications were empirical studies that utilized sensors to measure at least one psychological variable among clinical ED populations. RESULTS Sensors have been utilized with ED samples to measure eating behaviors, physical activity, sleep, autonomic nervous system activity, eyeblink startle response, visual attention, and visual-haptic object integration. The reliability and validity of these sensors varies widely and there are a number of significant gaps that remain in the literature with regard to the types of sensors utilized, context in which sensors have been used, and populations studied. DISCUSSION The existing literature utilizing sensors within ED research largely support the feasibility and acceptability of these tools. Sensors should continue to be utilized within the field, with a specific focus on examining the reliability and validity of these tools within ED samples and increasing the diversity of samples studied. PUBLIC SIGNIFICANCE STATEMENT Sensor technologies, such as those included in modern smartwatches, offer new opportunities to measure factors that may maintain or contribute to symptoms of eating disorders. This article describes the types of sensors that have been used in eating disorders research, challenges that may arise in using these sensors, and discusses new applications of these sensors that may be pursued in future research.
Collapse
Affiliation(s)
- Emily K Presseller
- Department of Psychological and Brain Sciences, Drexel University, Philadelphia, Pennsylvania, USA.,Center for Weight, Eating, and Lifestyle Science, Drexel University, Philadelphia, Pennsylvania, USA
| | | | - Stephanie C Fan
- Department of Psychological and Brain Sciences, Drexel University, Philadelphia, Pennsylvania, USA
| | - Elizabeth W Lampe
- Department of Psychological and Brain Sciences, Drexel University, Philadelphia, Pennsylvania, USA.,Center for Weight, Eating, and Lifestyle Science, Drexel University, Philadelphia, Pennsylvania, USA
| | - Adrienne S Juarascio
- Department of Psychological and Brain Sciences, Drexel University, Philadelphia, Pennsylvania, USA.,Center for Weight, Eating, and Lifestyle Science, Drexel University, Philadelphia, Pennsylvania, USA
| |
Collapse
|
4
|
Kissileff HR. The Universal Eating Monitor (UEM): objective assessment of food intake behavior in the laboratory setting. Int J Obes (Lond) 2022; 46:1114-1121. [PMID: 35233038 PMCID: PMC9151389 DOI: 10.1038/s41366-022-01089-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/27/2022] [Accepted: 02/02/2022] [Indexed: 11/17/2022]
Abstract
The Universal Eating Monitor was a term used to describe a device used in a laboratory setting that enabled investigators to measure, with the same instrument, the rate of eating either solids or liquids, hence the term “universal”. It consisted of an electronic balance placed in a false panel under a table cloth on which could be placed a food reservoir that contained either solid or liquefied food. The device was created in order to determine whether rates of eating differed in pattern between solid and liquid foods. An acceptable mixture of foods of identical composition that could be served as either solid or blended as a liquid was used to test the hypothesis that eating rate and intake were affected by physical composition. A best-fitting mathematical function (intake was quadratic function of time, with coefficients varying among foods used and experimental conditions), quantified intake rates. The device was used to test a variety of mechanisms underlying food intake control. Eating rates were linear when solid foods were used, but negatively accelerated with liquids. Overall, intake did not differ between solid and liquefied food of identical composition. Satiation on a calorie for calorie basis was different among foods, but physical composition interacted with energy density. Hormones and gastric distension were strong influences on food intake and rate of eating. Individuals with bulimia nervosa and binge eating disorder ate more than individuals without these disturbances. Intake in social and individual contexts was identical, but the rate of eating was slower when two individuals dined together. The eating monitor has been a useful instrument for elucidating controls of food intake and describing eating pathology.
Collapse
Affiliation(s)
- Harry R Kissileff
- Mount Sinai Morningside Hospital and Department of Medicine Icahn School of Medicine, 1111 Amsterdam Ave., New York, NY, 10025, USA.
| |
Collapse
|
5
|
Development of a New Pasta Product by the Incorporation of Chestnut Flour and Bee Pollen. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11146617] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
This work aimed at developing fortified pastas incorporating chestnut flour (25–55%) and powdered pollen (5–20%), either separately or in combination, as well as the characterization of the products obtained. To this, a physical characterization was carried out (analyzing texture and color), complemented with chemical analyses to determine the nutritional composition. Results showed that adding chestnut flour over 40% to wheat-flour pasta shortened optimum cooking time and lowered cooking yield, and the addition to pasta prepared with wheat flour and eggs maintained approximately constant the cooking yield. Additionally, the incorporation of pollen powder (up to 20%) in pasta prepared with wheat flour and water or fresh egg shortened the cooking time and cooking yield, in both fresh and dried pasta. The most suitable percentages of the new ingredients were 50% for chestnut and 10% for pollen. Comparing with the control pasta recipe (wheat flour and egg), the addition of chestnut flour (50%) or pollen powder (10%) increased stickiness, adhesiveness and the darkening of the final product (fresh or dried) but maintained the firmness of the pasta. The cooking of fresh or dried pasta enriched with both ingredients turned the pasta clearer and slightly stickier. On the other hand, the addition of chestnut flour and pollen powder in pasta formulation delivered a nutritionally balanced product with high fiber, vitamins and minerals. Overall, chestnut flour and powdered pollen represent promising ingredients for the development of functional fresh and dried pasta formulations.
Collapse
|
6
|
Idris G, Smith C, Galland B, Taylor R, Robertson CJ, Bennani H, Farella M. Relationship between chewing features and body mass index in young adolescents. Pediatr Obes 2021; 16:e12743. [PMID: 33079494 DOI: 10.1111/ijpo.12743] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 09/07/2020] [Accepted: 10/05/2020] [Indexed: 01/26/2023]
Abstract
BACKGROUND Behavioural aspects of chewing may influence food intake, nutritional status and in turn body weight. OBJECTIVES The current study aimed to study chewing features in adolescents as they naturally occur in home-based settings, and to test for a possible association with weight status. METHODS Forty-two adolescents (15.3 ± 1.3 years) were recruited (21 with healthy-weight/21 with overweight). Using a smartphone-assisted wearable electromyographic device, the chewing features of each participant were assessed over one evening, including the evening meal, in their natural home setting. RESULTS The mean (±SD) for chewing pace was 1.53 ± 0.22 Hz, chewing power 30.1% ± 4.8%, number of chewing episodes 63.1 ± 36.7 and chewing time 11.0 ± 7.7 minutes. The chewing pace of the group with overweight was slower than that of healthy weight (-0.20 Hz; 95% CI, -0.06 to -0.33; P = .005) while their chewing time was shorter (-4.9 minutes; 95% CI, 0.2-9.7; P = .044). A significant negative correlation was observed between BMI z-score and chewing pace (R = -.41; P = .007), and between BMI z-score and chewing time (R = -0.32; P = .039). CONCLUSION The current study suggests that adolescents who are overweight eat at a slower pace for a shorter period of time than their counterparts who are a healthy weight. This unexpected finding based on objective data appears to conflict with existing questionnaire findings but provides impetus for further work testing the effectiveness of changing eating behaviour as a weight-management intervention in youth.
Collapse
Affiliation(s)
- Ghassan Idris
- Sir John Walsh Research Institute, University of Otago, Dunedin, New Zealand.,Metro North Hospital and Health Service, Queensland Children's Hospital, Brisbane, Queensland, Australia
| | - Claire Smith
- Department of Women's and Children's Health, University of Otago, Dunedin, New Zealand.,Department of Human Nutrition, University of Otago, Dunedin, New Zealand
| | - Barbara Galland
- Department of Women's and Children's Health, University of Otago, Dunedin, New Zealand
| | - Rachael Taylor
- Department of Medicine, University of Otago, Dunedin, New Zealand
| | | | - Hamza Bennani
- Department of Computer Science, University of Otago, Dunedin, New Zealand
| | - Mauro Farella
- Sir John Walsh Research Institute, University of Otago, Dunedin, New Zealand
| |
Collapse
|
7
|
Eating rate and food intake are reduced when a food is presented in an ‘unusual’ meal context. Appetite 2020; 154:104799. [DOI: 10.1016/j.appet.2020.104799] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 07/01/2020] [Accepted: 07/03/2020] [Indexed: 01/13/2023]
|
8
|
Hawkins LK, Farrow C, Thomas JM. Do perceived norms of social media users’ eating habits and preferences predict our own food consumption and BMI? Appetite 2020; 149:104611. [DOI: 10.1016/j.appet.2020.104611] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 12/11/2019] [Accepted: 01/13/2020] [Indexed: 12/17/2022]
|
9
|
Bastami F, Zamani-Alavijeh F, Mostafavi F. Factors behind healthy snack consumption at school among high-school students: a qualitative study. BMC Public Health 2019; 19:1342. [PMID: 31640640 PMCID: PMC6805509 DOI: 10.1186/s12889-019-7656-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Accepted: 09/20/2019] [Indexed: 05/30/2023] Open
Abstract
BACKGROUND The prevalence of consuming fast foods and non-nutritious snacks is progressively increasing among adolescents. This study aimed to explore factors behind snack consumption at school among Iranian high-school students. METHODS This descriptive qualitative study was conducted in 2017 in four boys' and four girls' high-schools located in Isfahan, Khorramabad, and Tehran, Iran. Data were collected through 42 in-depth semi-structured interviews and four focus groups with male and female students, their parents, and their school teachers and administrators. The conventional content analysis approach was used for data analysis. Trustworthiness was applied to the study through prolonged engagement, maximum variation sampling, and member checking techniques. RESULTS Factors behind students' snack consumption came into two main groups, namely influential behaviors, and influential emotions and perceptions. Influential behaviors included the behaviors of students, their family members, peers, school administrators, and snack sellers. Moreover, influential emotions and perceptions included positive and negative feelings towards healthy snacks, fear over the consequences of unhealthy snacks, and perceived positive outcomes of healthy snacks. CONCLUSIONS Students' snack consumption at school is affected not only by their own behaviors, emotions, and perceptions, but also by significant others' behaviors and environmental factors. School administrators need to make environmental modifications to turn school environment into a pleasant place for healthy snack consumption and make healthy snack consumption a pleasurable experience for students.
Collapse
Affiliation(s)
- Fatemeh Bastami
- Department of Public Health, School of Health and Nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Fereshteh Zamani-Alavijeh
- Department of Health Education and Promotion, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Firoozeh Mostafavi
- Department of Health Education and Promotion, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
| |
Collapse
|
10
|
Eisenberg MH, Phillips LA, Fowler L, Moore PJ. The Impact of E-diaries and Accelerometers on Young Adults' Perceived and Objectively Assessed Physical Activity. PSYCHOLOGY OF SPORT AND EXERCISE 2017; 30:55-63. [PMID: 28966555 PMCID: PMC5619258 DOI: 10.1016/j.psychsport.2017.01.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
OBJECTIVE E-diaries and accelerometers promise more objective, real-time measurements of health behavior. However, social-psychological theory suggests that using electronic behavioral monitoring may influence rather than just record physical activity (PA), especially when a device is novel. DESIGN Participants (n=146) were randomly assigned to either an accelerometer-only, e-diary-only, accelerometer+e-diary, or a no-technology control group for one week to assess how these technologies influenced PA, both perceived and actual, in young adults. METHOD Participants reported their PA, overall and number of discrete exercise sessions (DES) at baseline and follow-up; accelerometers provided daily step counts and e-diaries captured daily reports of PA for the active week of the study. RESULTS Average daily steps in the accelerometer-only and accelerometer+e-diary groups did not differ nor did daily reports of PA via e-diary compared to accelerometer+e-diary group, showing that neither technology affected actual PA. ANCOVAS tested group differences in perceived PA; The accelerometer-only group had increased perceived overall PA but not DES compared to no-technology control. CONCLUSIONS Accelerometers may increase perceived overall PA, but the tested technologies did not increase DES or actual PA, suggesting that they may be viable unbiased measures of PA.
Collapse
Affiliation(s)
- Miriam H Eisenberg
- Health Behavior Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD
| | | | - Lauren Fowler
- The George Washington University, Department of Psychology, Washington, DC
| | - Philip J Moore
- The George Washington University, Department of Psychology, Washington, DC
| |
Collapse
|
11
|
Weathers D, Siemens JC, Kopp SW. Tracking food intake as bites: Effects on cognitive resources, eating enjoyment, and self-control. Appetite 2017; 111:23-31. [DOI: 10.1016/j.appet.2016.12.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 11/21/2016] [Accepted: 12/14/2016] [Indexed: 10/20/2022]
|
12
|
Robinson E, Proctor M, Oldham M, Masic U. The effect of heightened awareness of observation on consumption of a multi-item laboratory test meal in females. Physiol Behav 2016; 163:129-135. [PMID: 27137078 PMCID: PMC4959264 DOI: 10.1016/j.physbeh.2016.04.044] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 03/18/2016] [Accepted: 04/24/2016] [Indexed: 12/25/2022]
Abstract
Human eating behaviour is often studied in the laboratory, but whether the extent to which a participant believes that their food intake is being measured influences consumption of different meal items is unclear. Our main objective was to examine whether heightened awareness of observation of food intake affects consumption of different food items during a lunchtime meal. One hundred and fourteen female participants were randomly assigned to an experimental condition designed to heighten participant awareness of observation or a condition in which awareness of observation was lower, before consuming an ad libitum multi-item lunchtime meal in a single session study. Under conditions of heightened awareness, participants tended to eat less of an energy dense snack food (cookies) in comparison to the less aware condition. Consumption of other meal items and total energy intake were similar in the heightened awareness vs. less aware condition. Exploratory secondary analyses suggested that the effect heightened awareness had on reduced cookie consumption was dependent on weight status, as well as trait measures of dietary restraint and disinhibition, whereby only participants with overweight/obesity, high disinhibition or low restraint reduced their cookie consumption. Heightened awareness of observation may cause females to reduce their consumption of an energy dense snack food during a test meal in the laboratory and this effect may be moderated by participant individual differences. We examined the effect of heightened awareness of observation on food intake. This caused female participants to eat less of an energy dense snack food. This effect was moderated by weight status and trait eating behaviour measures. Heightened awareness of observation had little effect on intake of other foods.
Collapse
|
13
|
Thomas JM, Liu J, Robinson EL, Aveyard P, Herman CP, Higgs S. The Effects of Liking Norms and Descriptive Norms on Vegetable Consumption: A Randomized Experiment. Front Psychol 2016; 7:442. [PMID: 27065913 PMCID: PMC4811971 DOI: 10.3389/fpsyg.2016.00442] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 03/11/2016] [Indexed: 01/12/2023] Open
Abstract
There is evidence that social norm messages can be used to promote the selection of fruit and vegetables in low habitual consumers of these foods but it is unclear whether this effect is sustained over time. It is also unclear whether information about others' liking for a food (liking norm) could have the same effect. Using a 2 × 5 × 2 experimental design we investigated the effects of exposure to various messages on later intake from a food buffet and whether any effects were sustained 24 h after exposure in both low and high consumers of vegetables. There were three factors: delay (immediate food selection vs. food selection 24 h after exposure), message type (liking norm, descriptive norm, health message, vegetable variety condition, and neutral control message), and habitual consumption (low vs. high). The buffet consisted of three raw vegetables, three energy-dense foods, and two dips. For vegetables and non-vegetables there were no main effects of message type, nor any main effect of delay. There was a significant message × habitual vegetable consumption interaction for vegetable consumption; however, follow up tests did not yield any significant effects. Examining each food individually, there were no main effects of message type, nor any main effect of delay, for any of the foods; however, there was a message × habitual vegetable consumption interaction for broccoli. Consumption of broccoli in the health message and descriptive norm conditions did not differ from the control neutral condition. However, habitually low consumers of vegetables increased their consumption of broccoli in the vegetable variety and liking norm conditions relative to habitual low vegetable consumers in the neutral control condition (p < 0.05). Further, investigation of the effects of the liking norm and vegetable variety condition on vegetable intake is warranted. This trial is listed as NCT02618174 at clinicaltrials.gov.
Collapse
Affiliation(s)
- Jason M Thomas
- School of Psychology, University of Birmingham Birmingham, UK
| | - Jinyu Liu
- School of Psychology, University of Birmingham Birmingham, UK
| | - Eric L Robinson
- Department of Psychological Sciences, University of Liverpool Liverpool, UK
| | - Paul Aveyard
- Nuffield Department of Primary Care Health Sciences, Radcliffe Observatory Quarter, University of Oxford Oxford, UK
| | - C Peter Herman
- Department of Psychology, University of Toronto Toronto, ON, Canada
| | - Suzanne Higgs
- School of Psychology, University of Birmingham Birmingham, UK
| |
Collapse
|
14
|
Robinson E, Hardman CA, Halford JCG, Jones A. Eating under observation: a systematic review and meta-analysis of the effect that heightened awareness of observation has on laboratory measured energy intake. Am J Clin Nutr 2015; 102:324-37. [PMID: 26178730 DOI: 10.3945/ajcn.115.111195] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 05/19/2015] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Laboratory paradigms are commonly used to study human energy intake. However, the extent to which participants believe their eating behavior is being measured may affect energy intake and is a methodologic factor that has received little consideration. OBJECTIVE Our main objective was to examine available evidence for the effect that heightened awareness of observation has on energy intake in a laboratory setting. DESIGN We systematically reviewed laboratory studies that allowed for experimental examination of the effect that heightened awareness of observation has on energy intake. From these experimental studies we combined effect estimates using inverse variance meta-analysis, calculating the standardized mean difference (SMD) in energy intake between heightened-awareness and control conditions and qualitatively synthesized potential moderators of this effect. RESULTS Nine studies, providing 22 comparisons, were eligible for inclusion. These studies largely sampled young women and examined the energy intake of energy-dense snack foods. Evidence indicated that heightened awareness of observation was associated with reduced energy intake when compared with the control condition (random-effects SMD: 0.45; 95% CI: 0.25, 0.66; P < 0.0001). We found little evidence that the type of experimental manipulation used to heighten awareness moderated the overall effect. CONCLUSIONS The available evidence to date suggests that heightened awareness of observation reduces energy intake in a laboratory setting. These findings suggest that laboratory studies should attempt to minimize the degree to which participants are aware that their eating behavior is being measured.
Collapse
Affiliation(s)
- Eric Robinson
- Department of Psychological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Charlotte A Hardman
- Department of Psychological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Jason C G Halford
- Department of Psychological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Andrew Jones
- Department of Psychological Sciences, University of Liverpool, Liverpool, United Kingdom
| |
Collapse
|