Youth Perspectives on the Effects of a Family-centered Media Literacy Intervention to Encourage Healthier Eating

Figures & data

Figure 1. The basic hypothesized youth process model. Not shown, but included in the model, were age and pretest levels of each construct and measure.

Table 1. Standardized mean differences MANCOVA.

Dependent	Factor	Estimate	S.E.	1-Tailed P-Value	Sig
Child Initiated Discussion	Condition^1	0.166	0.063	.009	*
Critical Thinking (Source)	Condition^1	0.104	0.075	.165
Critical Thinking (Content)	Condition^1	0.213	0.074	.004	*
Talk About Nutrition Labels	Condition^1	0.170	0.061	.005	*
Vegetables Eaten Yesterday	Condition^1	0.239	0.061	<0.001	*
Fruit Eaten Yesterday	Condition^1	0.288	0.060	<0.001	*

1. Condition was coded as 0 = Control, 1 = Intervention.

Figure 2. The age by condition interaction effects (N = 143) on child initiated discussion (Panel A), critical thinking about source (Panel B), and fruit eaten yesterday (Panel C). A version of the results presented in panels a and C have been reported previously in a multivariate analysis (N = 137) with a larger model (Austin et al., 2020b). Both versions controlled for pretest levels of the dependent variables.

Table 2. Standardized mean differences MANCOVA controlling for youth age for dependent variables showing a significant age by condition interaction.

Dependent	Factor	Estimate	S.E.	1-Tailed p-Value	Sig
Child Initiated Discussion	Condition^1	−1.022	0.480	.017	*
	Youth Age	−0.032	0.089	.360
	Age by Condition	1.206	0.491	.007	*
Critical Thinking (Source)	Condition^1	−1.476	0.525	.003	*
	Youth Age	−0.034	0.072	.319
	Age by Condition	1.604	0.529	.001	*
Fruit Eaten Yesterday	Condition^1	0.122	0.084	.073
	Youth Age	1.270	0.486	.005	*
	Age by Condition	−0.990	0.475	.019	*

Condition was coded as 0 = Control, 1 = Intervention.

Figure 3. The final multigroup structural equation model showing differences between control group (Panel A) and intervention group (Panel B).

Table 3. Control and intervention group estimates from the MGSEM model.

		Control				Intervention
				95% CI^3				95% CI^3
Dependent	Predictor^1	Estimate	S.D.	Lower	Upper	Estimate	S.D.	Lower	Upper
Child Init. Disc.	Youth Age	0.013	0.107	−0.194	0.235	0.176***	0.059	0.077	0.281
Critical Thinking (Content)	Child Init. Disc.	0.261	0.194	−0.149	0.611	0.451***	0.107	0.215	0.641
	Youth Age	−0.026	0.139	−0.318	0.230	−0.015	0.044	−0.096	0.066
Critical Thinking~ (Source)	Child Init. Disc.	0.458***	0.139	0.162	0.716	0.366***	0.076	0.218	0.512
	Youth Age	0.064	0.107	−0.150	0.272	0.151***	0.053	0.078	0.281
Talk about Nutrition Labels	Child Init. Disc.	0.473*	0.214	0.053	0.899	0.661***	0.087	0.481	0.821
	Crit. Th. Content	0.220	0.201	−0.181	0.609	0.043	0.035	−0.026	0.112
	Crit. Th. Source	−0.202	0.203	−0.630	0.178	−0.165	0.106	−0.373	0.048
	Youth Age	0.109	0.105	−0.109	0.313	−0.124*	0.057	−0.236	−0.012
	Youth Age TE^2	0.068	0.072	−0.078	0.209	−0.034	0.051	−0.130	0.066
Vegetables Eaten Yesterday	Talk About Nutrition Labels	0.132*	0.067	−0.003	0.260	0.149*	0.075	−0.004	0.294
	Youth Age	−0.001	0.104	−0.205	0.205	−0.013	0.069	−0.152	0.121
	Child Init. Disc. TE^2	0.056*	0.038	−0.003	0.149	0.091*	0.050	−0.003	0.193
	Youth Age TE^2	0.008	0.075	−0.140	0.156	−0.015	0.054	−0.125	0.093
Fruit Eaten Yesterday	Talk About Nutrition Labels	0.214**	0.064	0.085	0.335	0.231**	0.069	0.093	0.367
	Youth Age	0.101	0.101	−0.106	0.283	−0.154*	0.064	−0.279	−0.024
	Child Init. Disc. TE^2	.093**	0.044	0.022	0.194	0.150**	0.050	0.059	0.258
	Youth Age TE^2	0.088	0.075	−0.065	0.230	−0.130**	0.053	−0.232	−0.027

* p < .05; ** p < .01; *** p < .001.

1. Results reflect variable’s direct effect unless otherwise noted; interaction effects tested in the MANCOVA are not noted.

2. TE = Total Effect.

3. Bayesian 95% Credibility Interval.

Austin, E. W., Austin, B., Kaiser, C. K., Edwards, Z., Parker, L., & Power, T. G. (2020b). A media literacy-based nutrition program fosters parent–child food marketing discussions, improves home food environment, and youth consumption of fruits and vegetables. Childhood Obesity, 16(S1), S-33. https://doi.org/10.1089/chi.2019.0240

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