Gamification of dietary decision-making in an elementary-school cafeteria.

PLoS One · 2014 · PMC3981730 · PMID 24718587

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a decreasing trendno p-value reported

Second, if tangible rewards were anticipated but never delivered, one would expect a decreasing trend on FV consumption during the intervention phase.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.