Portion size estimation and expectation of accuracy

Hernández, Teresita; Wilder, Lora B.; Kuehn, Doris; Rubotzky, Kenneth; Moser-Veillon, Phylis B.; Godwin, Sandria; Thompson, Cindy; Wang, Chunling

doi:10.1016/j.jfca.2006.02.010

Cited by 76 publications

(120 citation statements)

References 12 publications

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“…In eating situations such as when snacking or in a laboratory, unrestrained eaters usually do not have any specific knowledge about the appropriate quantity of food to consume or about their intended food intake amount, rendering situational cues all the more important as an indicator of how much one should consume (Herman & Polivy, 2005;Hermans, Herman, Larsen, & Engels, 2010). This may be due in part to individuals being unable to accurately estimate actual portion sizes of foods (Hernandez et al, 2006). Consistently, when food amount was increased by stuffing the small and large containers, participants relied on the PS served (and/or the CS, as both were equivalent) to estimate food intake, falling prey to the PS effect.…”

Section: Discussionmentioning

confidence: 99%

Container size influences snack food intake independently of portion size

2012

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a b s t r a c tWhile larger containers have been found to increase food intake, it is unclear whether this effect is driven by container size, portion size, or their combination, as these variables are usually confounded. The study was advertised as examining the effects of snack food consumption on information processing and participants were served M&M's for free consumption in individual cubicles while watching a TV show. Participants were served (1) a medium portion of M&M's in a small (n = 30) or (2) in a large container (n = 29), or (3) a large portion in a large container (n = 29). The larger container increased intake by 129% (199 kcal) despite holding portion size constant, while controlling for different confounding variables. This research suggests that larger containers stimulate food intake over and above their impact on portion size.

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Section: Discussionmentioning

confidence: 99%

Container size influences snack food intake independently of portion size

2012

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“…The study participants Study participants were selected on the basis of the target population of the national nutrition and health survey (HYDRIA) using convenience sampling and aiming to include about 100 individuals aged 12 years and over (9,17,18) . Invitations were disseminated in the campus of the University of Athens Medical School, which is located next to a large general hospital.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of a digital food photography atlas used as portion size measurement aid in dietary surveys in Greece

Naska

Valanou

Peppa

et al. 2016

Public Health Nutr.

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Objective: To evaluate how well respondents perceive digital images of food portions commonly consumed in Greece. Design: The picture series was defined on the basis of usual dietary intakes assessed in earlier large-scale studies in Greece. The evaluation included 2218 pre-weighed actual portions shown to participants, who were subsequently asked to link each portion to a food picture. Mean differences between picture numbers selected and portions actually shown were compared using the Wilcoxon paired signed-rank test. The effect of personal characteristics on participants' selections was evaluated through unpaired t tests (sex and school years) or through Tukey-Kramer pairwise comparisons (age and food groups). Setting: Testing of participants' perception of digital food images used in the Greek national nutrition survey. Subjects: Individuals (n 103, 61 % females) aged 12 years and over, selected on the basis of the target population of the Greek nutrition survey using convenience sampling. Results: Individuals selected the correct or adjacent image in about 90 % of the assessments and tended to overestimate small and underestimate large quantities. Photographs of Greek traditional pies and meat-based pastry dishes led participants to perceive the amounts in the photos larger than they actually were. Adolescents were more prone to underestimating food quantities through the pictures. Conclusions: The digital food atlas appears generally suitable to be used for the estimation of average food intakes in large-scale dietary surveys in Greece. However, individuals who consistently consume only small or only large food portions may have biased perceptions in relation to others.

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“…Portion-size validation studies aim to determine the level of precision (Smith, 1991) and to identify food items for which reliable measurement is difficult (Nelson and Haraldsdottir, 1998). The accuracy of portion-size estimation has been studied in real-time testing (Lucas et al, 1995;Frobisher and Maxwell, 2003;Hernández et al, 2006) or as part of diet recall studies (Karvetti and Knuts, 1985;Turconi et al, 2005). It has been reported that measuring the portion sizes has an effect on habitual food consumption and energy intake (Matthiessen et al, 2003), but this effect has also been considered limited (Noethling et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Accuracy in the estimation of food servings against the portions in food photographs

M-L¹,

Paturi²,

Reinivuo³

et al. 2007

Eur J Clin Nutr

112

142

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Objective: In diet surveys, quantitative underestimation of food consumption may be due to intentional misreporting or false portion-size reporting. Perception of food photographs used as aids for assessing the actual amounts may have an effect. This study was carried out to assess the validity of food photographs. Design: A real-time test protocol where 52 presented food servings were compared against photographed portions with similar food items. Subjects: Volunteers from the Rehabilitation Company Petrea (in Turku) were recruited, 161 adults participated, and for 146 subjects, complete data were collected. Methods: The proportions of correct estimations and reporting errors, in weights and percentages, are presented by gender and food group. Food descriptors, portion-size options and subject characteristics were studied as potential determinants of accuracy in portion-size estimation. Results: The total proportion of exactly correct estimations was 51% in men and 49% in women. The overall reporting error was À10 g in men and þ 1 g in women for the 52 food servings. Underreporting was typical for bread, spread and cold cuts and dishes in both genders. Over-reporting was typical for cereals in both genders and for snacks, vegetables and fruit in women. The estimation error was associated with the portion-size options but not associated with the energy density of food items, education or body mass index. Conclusions: Food portions in photographs seem to be a useful aid for the quantification of most food items. However, validation studies are needed to test the applicability of photographs for estimating current portions and for searching better tools in dietary surveys.

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Portion size estimation and expectation of accuracy

Cited by 76 publications

References 12 publications

Container size influences snack food intake independently of portion size

Container size influences snack food intake independently of portion size

Evaluation of a digital food photography atlas used as portion size measurement aid in dietary surveys in Greece

Accuracy in the estimation of food servings against the portions in food photographs

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