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Portion sizes and bowl sizes may be related to food intake and perceived fullness. The objective of the present study was to investigate the effects of portion size and bowl size and possible interactions between these variables on food intake and fullness in a sample of Japanese men.
Participants ate four different experimental meals across four weeks and completed questionnaires about their fullness using a visual analogue scale administered before and after meals. The four meal patterns included consistent portions of several foods commonly eaten together in typical Japanese meals, along with 150 g of rice served in a small rice bowl (diameter of 11·5 cm), 150 g of rice served in a large rice bowl (diameter of 13·5 cm), 250 g of rice served in a small rice bowl or 250 g of rice served in a large rice bowl.
Twenty-one adult men participated in the study.
Portion size had a significant main effect on rice intake (F(1,20)=83, P<0·001) and fullness (F(1,20)=8·0, P=0·010), but no significant effects of bowl size on the outcome variables were found. The interactions between portion size and bowl size on intake and fullness were not significant.
The sample of Japanese men showed an influence of portion size on food intake. Further research is needed to clarify the combined effects of bowl size and portion size on intake and fullness.
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