Hunter 2018 (S1)

Methods	Study design: Between‐participants randomised controlled trial
Participants	Setting: Laboratory setting Setting type: Laboratory (multipurpose room in community setting) Geographical region: UK Number of enrolled participants: 159 Number (%) of enrolled participants completing the study and included in analysis: 100% Study completers – mean age (SD): 38.4 (15.2) Study completers ‐ sex: 63.5% female Specific social or cultural characteristics: General public sample Socioeconomic status context: Both high and low deprivation Inclusion criteria: 18 years or over Exclusion criteria: Food allergies or intolerance
Interventions	Intervention type: Proximity Type of proximity intervention: Proximity from positioned participant (chair at which seated) (distance from set point) Manipulated product type: Food Characteristics of manipulated products: Chocolate M&Ms Duration of exposure to intervention: ≤ 1 day Study arms: 1000 g of chocolate M&Ms in a transparent 1‐litre bowl placed 20 cm from seated participants’ right armrest; 1000 g of chocolate M&Ms in a transparent 1‐litre bowl placed 70 cm from seated participants’ right armrest Number of comparisons analysed: 1 Comparisons analysed: M&Ms placed at 20 cm from participant versus M&Ms placed at 70 cm from participant Concurrent intervention components in factorial design: No Concurrent intervention components confounded with comparison of interest: No
Outcomes	Outcomes reported in study: Proportion of total participants consuming any M&Ms (specified as primary outcome); mean amount of snacks consumed (grams) Selection outcome analysed: N/A Measurement of selection outcome: N/A Timing of selection outcome measurement: N/A Consumption outcome analysed: Proportion of total participants consuming any M&Ms Measurement of consumption outcome: Objective Timing of consumption outcome measurement: Immediate (≤ 1 day) Secondary outcome: N/A
Funding source	UK Medical Research Council and Raymond and Beverly Sackler Foundation. The authors reported that there were no conflicts of interest.
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