Table 2.

Independent predictors of food intake in a between-subjects laboratory study of dishware size and snack food intake

Predictor	Standardized beta	t value	Significance (P)
Bowl size condition	0·27‡	2·42	0·02*
Gender	0·29§	2·59	0·01*
BMI	0·15	1·27	0·21
Baseline hunger† (higher scores indicate greater hunger)	0·30	2·67	0·01*
Disinhibition (higher scores indicate disinhibited eating)	0·15	1·30	0·20
Restraint (higher scores indicate restrained eating)	−0·04	0·35	0·73

All baseline variables or participant characteristics that were associated with popcorn intake at P<0·20 were included in a forced-entry linear regression model to examine their (independent) predictive effects on popcorn intake. The overall model was significant (F (6, 52)=5·2, adjusted R ²=0·30, P<0·001). The association between rated palatability of the popcorn and intake approached statistical significance (r=0·29, P=0·08), but because rated palatability is not a participant characteristic per se and could be influenced by the amount of popcorn participants ate (‘I ate a lot, so I must like it’), we did not include it as a predictor in the regression model. However, if it is included the results remain the same and the effect of condition is still statistically significant (P=0·024).

^*Denotes significant predictor.

^†Baseline hunger is on a 0–100 mm scale (anchors: 1=‘not at all hungry’, 100=‘extremely hungry’).

^‡Direction of beta value indicates that participants in the small bowl condition ate more than participants in the large bowl condition.

^§Direction of beta value indicates that males ate more than females.