scholarly journals Optimizing portion-size estimation aids: a formative evaluation in Malawi

2019 ◽  
Vol 22 (17) ◽  
pp. 3127-3139 ◽  
Author(s):  
Courtney H Schnefke ◽  
Chrissie Thakwalakwa ◽  
Mary K Muth ◽  
John Phuka ◽  
Jennifer Coates ◽  
...  
Keyword(s):  
Formative Evaluation ◽  
Simultaneous Presentation ◽  
Structured Interview ◽  
Ease Of Use ◽  
Portion Size ◽  
Sequential Presentation ◽  
Size Estimation ◽  
Resource Setting ◽  
Visual Characteristics ◽  
Portion Size Estimation

AbstractObjective:To investigate preferences for and ease-of-use perceptions of different aspects of printed and digitally displayed photographic portion-size estimation aids (PSEA) in a low-resource setting and to document accuracy of portion-size selections using PSEA with different visual characteristics.Design:A convergent mixed-methods design and stepwise approach were used to assess characteristics of interest in isolation. Participants served themselves food and water, which were weighed before and after consumption to measure leftovers and quantity consumed. Thirty minutes later, data collectors administered a meal recall using a PSEA and then a semi-structured interview.Setting:Blantyre and Chikwawa Districts in the southern region of Malawi.Participants:Ninety-six women, aged 18–45 years.Results:Preferences and ease-of-use perceptions favoured photographs rather than drawings of shapes, three and five portion-size options rather than three with four virtual portion-size options, a 45° rather than a 90° photograph angle, and simultaneous rather than sequential presentation of portion-size options. Approximately half to three-quarters of participants found the portion-size options represented appropriate amounts of foods or water consumed. Photographs with three portion sizes resulted in more accurate portion-size selections (closest to measured consumption) than other format and number of portion-size option combinations. A 45° angle and simultaneous presentation were more accurate than a 90° angle and sequential presentation of images.Conclusions:Results from testing PSEA visual characteristics separately can be used to generate optimal PSEA, which can improve participants’ experiences during meal recalls.

scholarly journals An evaluation of portion size estimation aids: precision, ease of use and likelihood of future use

2016 ◽  
Vol 19 (13) ◽  
pp. 2377-2387 ◽  
Author(s):  
Gemma P Faulkner ◽  
M Barbara E Livingstone ◽  
L Kirsty Pourshahidi ◽  
Michelle Spence ◽  
Moira Dean ◽  
...  
Keyword(s):  
Narrow Range ◽  
Ease Of Use ◽  
Portion Size ◽  
Size Estimation ◽  
Portion Sizes ◽  
Males And Females ◽  
Portion Size Estimation ◽  
Serving Sizes ◽  
Grain Foods ◽  
Median Rating

AbstractObjectiveThe present study aimed to evaluate the precision, ease of use and likelihood of future use of portion size estimation aids (PSEA).DesignA range of PSEA were used to estimate the serving sizes of a range of commonly eaten foods and rated for ease of use and likelihood of future usage.SettingFor each food, participants selected their preferred PSEA from a range of options including: quantities and measures; reference objects; measuring; and indicators on food packets. These PSEA were used to serve out various foods (e.g. liquid, amorphous, and composite dishes). Ease of use and likelihood of future use were noted. The foods were weighed to determine the precision of each PSEA.SubjectsMales and females aged 18–64 years (n 120).ResultsThe quantities and measures were the most precise PSEA (lowest range of weights for estimated portion sizes). However, participants preferred household measures (e.g. 200 ml disposable cup) – deemed easy to use (median rating of 5), likely to use again in future (all scored either 4 or 5 on a scale from 1=‘not very likely’ to 5=‘very likely to use again’) and precise (narrow range of weights for estimated portion sizes). The majority indicated they would most likely use the PSEA preparing a meal (94 %), particularly dinner (86 %) in the home (89 %; all P<0·001) for amorphous grain foods.ConclusionsHousehold measures may be precise, easy to use and acceptable aids for estimating the appropriate portion size of amorphous grain foods.

scholarly journals A comparison of food portion size estimation by older adults, young adults and nutritionists

2017 ◽  
Vol 22 (2) ◽  
pp. 230-236 ◽  
Author(s):  
Claire Marie Timon ◽  
S. E. Cooper ◽  
M. E. Barker ◽  
A. J. Astell ◽  
T. Adlam ◽  
...  
Keyword(s):  
Older Adults ◽  
Young Adults ◽  
Portion Size ◽  
Size Estimation ◽  
Food Portion ◽  
Portion Size Estimation ◽  
Food Portion Size

scholarly journals Validation of a digitally displayed photographic food portion-size estimation aid among women in urban and rural Malawi

2019 ◽  
Vol 22 (17) ◽  
pp. 3140-3150 ◽  
Author(s):  
Valerie L Flax ◽  
Chrissie Thakwalakwa ◽  
Courtney H Schnefke ◽  
Heather Stobaugh ◽  
John C Phuka ◽  
...  
Keyword(s):  
Rural Communities ◽  
Low Income ◽  
Portion Size ◽  
Size Estimation ◽  
Individual Level ◽  
Low Income Country ◽  
Urban Rural ◽  
Highly Correlated ◽  
The Individual ◽  
Portion Size Estimation

AbstractObjective:To validate digitally displayed photographic portion-size estimation aids (PSEA) against a weighed meal record and compare findings with an atlas of printed photographic PSEA and actual prepared-food PSEA in a low-income country.Design:Participants served themselves water and five prepared foods, which were weighed separately before the meal and again after the meal to measure any leftovers. Participants returned the following day and completed a meal recall. They estimated the quantities of foods consumed three times using the different PSEA in a randomized order.Setting:Two urban and two rural communities in southern Malawi.Participants:Women (n 300) aged 18–45 years, equally divided by urban/rural residence and years of education (≤4 years and ≥5 years).Results:Responses for digital and printed PSEA were highly correlated (>91 % agreement for all foods, Cohen’s κw = 0·78–0·93). Overall, at the individual level, digital and actual-food PSEA had a similar level of agreement with the weighed meal record. At the group level, the proportion of participants who estimated within 20 % of the weighed grams of food consumed ranged by type of food from 30 to 45 % for digital PSEA and 40–56 % for actual-food PSEA. Digital PSEA consistently underestimated grams and nutrients across foods, whereas actual-food PSEA provided a mix of under- and overestimates that balanced each other to produce accurate mean energy and nutrient intake estimates. Results did not differ by urban and rural location or participant education level.Conclusions:Digital PSEA require further testing in low-income settings to improve accuracy of estimations.

Equivalence-Based Instruction with Nonfood Items to Increase Portion-Size Estimation Accuracy

2018 ◽  
Vol 68 (4) ◽  
pp. 537-547 ◽  
Author(s):  
Brianna Regan ◽  
Jason C. Vladescu ◽  
Kenneth F. Reeve ◽  
Ruth M. DeBar
Keyword(s):  
Portion Size ◽  
Estimation Accuracy ◽  
Size Estimation ◽  
Based Instruction ◽  
Portion Size Estimation

scholarly journals Integrating nutrition into the mathematics curriculum in Australian primary schools: protocol for a randomised controlled trial

2020 ◽  
Vol 19 (1) ◽  
Author(s):  
Berit M. Follong ◽  
Elena Prieto-Rodriguez ◽  
Andrew Miller ◽  
Clare E. Collins ◽  
Tamara Bucher
Keyword(s):  
Primary School ◽  
Nutrition Education ◽  
Controlled Trial ◽  
Nutrition Knowledge ◽  
Portion Size ◽  
Trial Registration ◽  
Size Estimation ◽  
Post Intervention ◽  
And Mathematics ◽  
Portion Size Estimation

Abstract Background Nutrition education programs in schools have been effective in improving children’s knowledge and behaviours related to food and nutrition. However, teachers find it challenging to implement such programs due to overcrowded curricula. Integrating nutrition with core subjects such as mathematics could potentially address time constraints and improve the learning of both. The primary aim of this randomized controlled trial (RCT) is to evaluate the impact of a cross-curricular nutrition and mathematics program on primary school students’ portion size estimation skills. Secondary aims include impact on their nutrition knowledge, attitudes towards mathematics and evaluating the quality of the lessons. Methods Twelve Year 3–4 classes from Catholic schools in New South Wales, Australia will be randomised to intervention (n = 6) or control (n = 6) groups. Teachers in the intervention group will receive a professional development workshop and resources to teach 4–5 lessons on portion size and measurements across 1–4 weeks. Outcome measures include portion size estimation skills, nutrition knowledge and attitudes towards mathematics, with data collected during three school visits (pre-intervention, immediately post-intervention, 4 weeks post-intervention). Additionally, teaching quality will be assessed in both intervention and control groups and process evaluation undertaken using teacher interviews and student focus groups. Discussion This RCT uses an innovative approach to improve both nutrition and mathematics related learning outcomes among primary school children. It has the potential to impact teaching practices regarding integration of nutrition into curricula and enhance the implementation of nutrition education interventions. Trial registration Australian and New Zealand Clinical Trials Register ACTRN12619001071112 31/07/2019.

Evaluation of portion size estimation aids used for meat in dietary surveys

2001 ◽  
Vol 21 (9) ◽  
pp. 1217-1233 ◽  
Author(s):  
Sandria Godwin ◽  
Bruce McGuire ◽  
Edgar Chambers ◽  
Margaret McDowell ◽  
Linda Cleveland ◽  
...  
Keyword(s):  
Portion Size ◽  
Size Estimation ◽  
Dietary Surveys ◽  
Portion Size Estimation

Effects of hunger and experience on portion size estimation by men

Appetite ◽  
2009 ◽  
Vol 52 (3) ◽  
pp. 821 ◽  
Author(s):  
N. Brogden ◽  
C. Sinclair ◽  
E. Almiron-Roig
Keyword(s):  
Portion Size ◽  
Size Estimation ◽  
Portion Size Estimation
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