Informed decisions. Better health. Cochrane Database of Systematic Reviews Participants allocated to one of 2 groups for snacking during breaks, which determined which in-tervention was received: Intervention 1: allocated to table for snacking with halved pieces of cake as well as apples served in quarter pieces Intervention 2: allocated to table for snacking with normal (full) sized pieces of cake as well as whole apples Quantity of cake and apples consumed, measured by observation using electronic counting system Unclear based on study report (conference abstract) whether study has an eligible design Within-subjects, cluster-randomised controlled trial 250 children aged 3 to 6 years. Field setting. DaGuan Kindergarten, Kunming, Yunnan Province, Chi-na Manipulated product type: food Target of manipulation: portion size Duration of exposure to intervention: ≤ 1 day Concurrent intervention components: no Eligible comparison(s): [1] Intervention 1: exposure to 105 g portion of rice/vegetable/protein mix and soup; versus Inter-vention 2: exposure to 150g portion of rice/vegetable/protein mix and soup [2] Intervention 1: exposure to 150 g portion of rice/vegetable/protein mix and soup; versus Inter-vention 2: exposure to 195g portion of rice/vegetable/protein mix and soup Variable description (type) Category Includ-ed in provi-sion-al con-ceptual model? Includ-ed in fi-nal con-ceptual model? Includ-ed study first en-coun-tered Other included studies encoun-tered Rationale for inclusion in fi-nal conceptual model Study design Wansink 2006 (Continued) Interventions Outcomes Cochrane Library Interventions Outcomes Wansink 2011b (Continued) Chang 2012 Cleghorn 2010 Cochrane Library Study Farleigh 1990 Faucher 2010 Freedman 2010 French 2014 Garber 2008 Geaney 2013 Geier 2006 Gillis 2009 Goldfarb 1972 Gosnell 2001 Greenfield 1983 Greenfield 1984 Gritz 1976 Hackbart 2009 Haisfield 2011 Hartstein 2008 Head 1977 Healthy Study Group 2009 Healthy Study Group 2012 Higgins 1964 Cochrane Library Study Kral 2004b Lawless 2003 Leidy 2010 Levitsky 2011 Lewis 2013 Libotte 2014 Liem 2009 Lieux 1992 Lin 2013 Meguid 1998 Mendoza 2010 Olsen 2012 Pornpitakpan 2010 Raghubir 1999 Rolls 1982 Rolls 1985 Rolls 1990 Rolls 2012 Savage 2012 Saylor 1987 Cochrane Library Interventions Outcomes Notes Skov 2013 (Continued) Methods Participants Interventions Construct Randomised controlled trial or cluster-randomised con-trolled trial (Categorical, di-chotomous) Study character-istic Yes Yes N/A N/A N/A Study design Between subjects or with-in-subjects design (Categori-cal, dichotomous) Study character-istic Yes Yes N/A N/A N/A Study/ intervention setting Laboratory or field setting (Categorical, dichotomous) Study character-istic Yes Yes N/A N/A N/A Study/ intervention setting Selecting/consuming alone or selecting/consuming with others Study character-istic Yes Yes N/A N/A N/A Product type Food or tobacco (or alcohol -no studies) (Categorical, di-chotomous) Study character-istic Yes Yes N/A N/A N/A Healthiness of ma-nipulated produc-t(s) (food products only) FSA Nutrient Profile Score (Continuous) Study character-istic Yes Yes N/A N/A N/A Basis for calculat-ing healthiness of manipulated prod-uct(s) (food prod-ucts only) Specific product or product category (Categorical, di-chotomous) Study character-istic Yes Yes N/A N/A N/A manipulated prod-FSA Nutrient Profile model (Continuous) character-istic 2004 (study 2004a, Fisher ies that the energy density of food can exert independent Portion, 258 Energy density of Energy density points from Study No Yes Devitt Kral Evidence from previous stud- Sup-port-ing evi-dence N/A N/A N/A N/A N/A N/A N/A 2004a, Kral Ratio-nale for ex-clusion from fi-nal con-ceptual model N/A N/A N/A N/A N/A N/A N/A N/A Cluskey 1999 Huyghe 2013 Scheibehenne 2010 Measurement of consumption outcome: N/A Measurement of consumption outcome: objective Not an eligible study design No eligible interventions (within-study comparisons) Not an eligible study design Collings 2008 Jaeger 2011 Scisco 2012 (S1) Timing of consumption outcome measurement: N/A Timing of consumption outcome measurement: immediate (≤ 1 day) No eligible interventions (within-study comparisons) Not an eligible study design No eligible interventions (within-study comparisons) Funding source Funding source Cullen 2005 Just 2014 (S1) Scisco 2012 (S2) Self funded Not reported No eligible interventions (within-study comparisons) No eligible interventions (within-study comparisons) No eligible interventions (within-study comparisons) Notes Notes Cunningham 2011 Just 2014 (S2) Sharafi 2010 Outcome data for each manipulation analysed separately (one comparison each) -Not an empirical study Not an eligible study design Not an eligible study design Risk of bias Risk of bias Divert 2015 Kallbekken 2013 Spanos 2015 No eligible interventions (within-study comparisons) Not an eligible study design No eligible interventions (within-study comparisons) Bias Bias Edelman 1986 Kesman 2011 Spiegel 1993 Authors' judgement Support for judgement Authors' judgement Support for judgement Not an eligible study design No eligible interventions (within-study comparisons) Not an eligible study design Random sequence genera-tion (selection bias) Random sequence genera-tion (selection bias) Ello-Martin 2005 Kildegaard 2011 Spill 2011a Unclear risk Unclear risk Not an empirical primary study Comment: method of sequence generation is not described.