Menu-engineering in restaurants - adapting portion sizes on plates to enhance vegetable consumption: a real-life experiment

Table 4 Estimated marginal means (SE) for evaluation amount of vegetables and meat/fish and satisfaction for all locations

		Evaluation amount of vegetables [−2 = too little; 2 = too much]	Evaluation amount of meat or fish [−2 = too little; 2 = too much]	Satisfaction with meal [−2 = very dissatisfied; 2 = very satisfied]	Satisfaction with restaurant visit [−2 = very dissatisfied; 2 = very satisfied]
Period
Control (n = 530)		−.12 (.034)^a	.18 (.027)^a	1.38 (.031)^a	1.35 (.028)^a
Intervention (n = 469)		.32 (.037)^b	.08 (.030)^b	1.25 (.034)^b	1.27 (.031)^a
Location
Restaurant 1 (n = 129)		−.01 (.059)^a	.06 (.048)^a	1.26 (.054)^a	1.23 (.049)^a
Restaurant 2 (n = 324)		.12 (.037)^b	.14 (.030)^a	1.25 (.034)^a	1.29 (.030)^a
Restaurant 3 (n = 546)		.19 (.029)^b	.18 (.023)^a	1.43 (.026)^b	1.40 (.024)^b
Main effect Intervention	F (df1,df2) Partial η ²	73.30*** (1, 1000) .068	6.26* (1, 1000) .006	7.20** (1, 1000) .007	3.65 (1, 1000) .004
Main effect Location	F (df1,df2) Partial η ²	5.16** (2, 1000) .010	2.36 (2, 1000) .005	10.22*** (2, 1000) .020	6.95** (2, 1000) .014
Main effects Intervention*Location	F (df1,df2) Partial η ²	1.83 (2, 1000) .004	.43 (2, 1000) .001	.94 (2, 1000) .002	1.27 (2, 1000) .003

Answer scales ranged from −2 to 2 (standard errors are reported in brackets); Means with a different superscript ^{a, b} indicate a significant difference (p < .05) (means are compared two at a time); *** p < .001; **p < .01; *p < .05

ISSN: 1479-5868