Small, medium, large or supersize? The development and evaluation of interventions targeted at portion size.

21 The results showed that reference portion size labeling (that is, labels that provided consumers with a reference portion size) increased the likelihood that participants chose small sizes of soft drink compared with labels that only communicated the amount of soft drink in milliliters (although this was a statistical trend).

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Finally, the small meal attracted a relevant target group, as small meal purchases were positively related to being female and to body mass index (the latter was borderline significant).

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