Table 1.

Health Beliefs Survey: scale descriptions and internal consistency estimates

Variable description		Subscale	Number of items	Alphaa
Food Beliefs Survey
	Social support	Family	11	.90
		Friends	11	.94
	Self-efficacy	Eating healthy foods	12	.91
		Avoiding high-fat and high-sugar foods	15	.90
		Planning and tracking intake	10	.96
	Positive physical and self-evaluative outcome expectations		10	.90
	Negative physical, social and self-evaluative outcome expectations		11	.89
	Self-regulation	Planning and tracking	11	.92
		High-fat and high-sugar foods	13	.90
		Healthy food choices	8	.90
PhysicalActivity Beliefs Survey
	Social support	Family	8	.94
		Friends	8	.96
	Self-efficacy		23	.95
	Positive outcome expectations	Physical	5	.83
		Affective	5	.66
	Negative outcome expectations: physical, social, and self-evaluative		7	.88
	Self-regulation	Setting goals and planning activity	9	.91
		Tracking physical activity	5	.85
		Increasing enjoyment	3	.77

^a Cronbach alpha coefficient of internal consistency.