Table 2.

Manipulation checks of vaping prevention message content in two Amazon Mechanical Turk samples of young adults, Spring 2020

Phase 1 (n = 200)	Harm check	Addiction check	Flavor check	Social check
	Coef	Coef	Coef	Coef
Addiction + Alone	Ref.	Ref.	Ref.	Ref.
Addiction + Flavors	0.35 *	−0.28	1.27 **	−0.06
Addiction + Social	−0.37 *	−0.71 **	−0.03	0.97 **
Harm + Alone	0.93 **	−1.94 **	0.06	−0.17
Harm + Flavors	1.10 **	−1.77 **	1.27 **	−0.21
Harm + Social	0.95 **	−1.68 **	−0.18	0.84 **
Constant	4.51 **	5.69 **	3.31 **	3.51 **
Phase 2 (n = 769)a	Harm check	Addiction check	Flavor check	Social check
	Coef	Coef	Coef	Coef
Addiction + Alone + Likeable image	Ref.	Ref.	Ref.	Ref.
Addiction + Alone + Effective image	−0.33 *	0.46 *	−0.11	−0.36 *
Addiction + Flavors + Likeable image	0.26	0.03	1.29 **	−0.17
Addiction + Flavors + Effective image	0.21	−0.09	1.28 **	−0.28
Addiction + Social + Likeable image	−0.39 *	0.00	0.09	1.33 **
Addiction + Social + Effective image	−0.33 *	−0.10	0.07	1.28 **
Harm + Alone + Likeable image	0.95	−1.33	0.14	−0.27
Harm + Alone + Effective image	1.05 **	−1.36 **	0.04	−0.37 *
Harm + Flavors + Likeable image	0.75 **	−1.26 **	1.66 **	−0.15
Harm + Flavors + Effective image	0.85 **	−1.49 **	1.53 **	−0.25
Harm + Social + Likeable image	0.70 **	−1.28 **	−0.03	0.87 **
Harm + Social + Effective image	0.73 **	−1.10 **	0.03	0.87 **
Constant	4.81 **	5.28 **	3.32 **	3.72 **

^*p<0.05

^**p<0.001

^an = 59 respondents participated in both Phase 1 and Phase 2