Table 2.
Results of ANOVA models examining moderation of portion size by participant characteristics controlling for study origin.
| Main effect of Study origin | Main effect of Portion size | Main effect of participant characteristic factor | Portion size × participant characteristic factor interaction | |
|---|---|---|---|---|
| Sex | df = 2, F = 74.08, ηp2 = .581, p < .001 | df = 2, F = 7.11, ηp2 = .062, p = .001 | df = 1, F = 18.44, ηp2 = .147, p < .001 | df = 2, F = 0.13, ηp2 = .001, p = .88 |
| BMI | df = 2, F = 61.88, ηp2 = .536, p < .001 | df = 2, F = 3.36, ηp2 = .030, p = .04 | df = 1, F = 1.80, ηp2 = .017, p = .18 | df = 2, F = 2.74, ηp2 = .025, p = .07 |
| Usual portion size | df = 2, F = 83.64, ηp2 = .610, p < .001 | df = 2, F = 53,73, ηp2 = .033, p < .001 | df = 1, F = 30.04, ηp2 = .219, p < .001 | df = 2, F = 0.49, ηp2 = .005, p = .61 |
| Restrained eating | df = 2, F = 64.55, ηp2 = .547, p < .001 | df = 2, F = 1.12, ηp2 = .010, p = .33 | df = 1, F = 0.79, ηp2 = .007, p = .38 | df = 2, F = 0.95, ηp2 = .009, p = .39 |
| Emotional eating | df = 2, F = 63.19, ηp2 = .542, p < .001 | df = 2, F = 7.63, ηp2 = .067, p = .001 | df = 1, F = 0.47, ηp2 = .004, p = .50 | df = 2, F = 0.45, ηp2 = .004, p = .64 |
| External eating | df = 2, F = 63.50, ηp2 = .543, p < .001 | df = 2, F = 1.03, ηp2 = .010, p = .36 | df = 1, F = 0.00, ηp2 = .000, p = .98 | df = 2, F = 0.14, ηp2 = .001, p = .87 |
| Plate clearing tendencies | df = 2, F = 70.00, ηp2 = .556, p < .001 | df = 2, F = 2.06, ηp2 = .019, p = .13 | df = 1, F = 6.90, ηp2 = .061, p = .01 | df = 2, F = 0.99, ηp2 = .009, p = .37 |
| Food waste concerns | df = 2, F = 61.19, ηp2 = .534, p < .001 | df = 2, F = 0.33, ηp2 = .003, p = .72 | df = 1, F = 3.18, ηp2 = .029, p = .08 | df = 2, F = 1.31, ηp2 = .012, p = .27 |
| Self-control | df = 2, F = 59.69, ηp2 = .527, p < .001 | df = 2, F = 2.06, ηp2 = .019, p = .13 | df = 1, F = 0.01, ηp2 = .000, p = .92 | df = 2, F = 0.08, ηp2 = .001, p = .93 |
| Satiety responsiveness | – | df = 2, F = 1.33, ηp2 = .045, p = .27 | df = 1, F = 0.45, ηp2 = .016, p = .51 | df = 2, F = 0.55, ηp2 = .019, p = .55 |
N = 111. Raw data for participant characteristic factors was used in all analyses, with the exception of usual portion size (z-scored in each study to account for slight measurement differences across studies).