Correlated Drug Terms (1)

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	Name (Synonyms)	Correlation
drug2920	non e-cigarette TV commercials Wiki	1.00

Correlated MeSH Terms (1)

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	Name (Synonyms)	Correlation
D004198	Disease Susceptibility NIH	0.45

Correlated HPO Terms (0)

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	Name (Synonyms)	Correlation

Primary Outcomes

Description: Scores are measured by recording the amount of time (reaction time) it takes to categorize smoking-related words with positive (e.g., cool) and negative (e.g., cancer) words. Faster reaction times when categorizing smoking-related words with positive words is evidence of higher positive smoking expectancies.

Measure: change in baseline in implicit positive smoking expectancies, measured by the implicit association test

Time: baseline, within 5 minutes post intervention

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Description: Eye-tracking will be used to measure the amount of time spent looking at static smoking cues in screen shots taken from e-cigarette advertisements. The amount time spent looking at a smoking cue is a measure how much attention was given to the smoking cue. The longer the looking time, the greater amount of attention.

Measure: Amount of time spent looking at static smoking cues in e-cigarette advertisements

Time: approximately 30 minutes post intervention

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Description: Scores are measured on a 7-item scale. Positive smoking expectancies will be assessed using the following questions that follow the lead-in, "Please tell me how you feel about the following statements." "I think I would enjoy smoking"; "I think smoking would give me something to do when I'm bored"; "I think smoking would help me deal with problems or stress"; "I think smoking would help me stay thin"; "I think smoking would help me to feel more comfortable at parties"; "I think smoking would be relaxing"; and "I think smoking would make me look older." Responses are yes/no. Responses are coded as "1" for yes and "0" for no. Responses are then summed for a maximum positive smoking expectancy score out of 7. Higher scores mean higher positive smoking expectancies.

Measure: 7-item explicit positive smoking expectancies scale

Time: approximately 30 minutes post intervention

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Description: This 11-item scale assess social normative beliefs about smoking related to 1) perceived disapproval from family/friends, 2) perceived popularity among successful/elite, and 3) perceived prevalence. Disapproval scale questions are answered using a 4-point Likert scale (1 = Strongly disagree; 4 = Strongly agree). A total disapproval score (ranging from 1 to 4) is calculated by averaging responses to each question. Higher values indicate a higher disapproval score. Popularity scale questions are answered using a 4-point Likert scale (1 = Strongly disagree; 4 = Strongly agree). A total popularity score (ranging from 1 to 4) is calculated by averaging responses to each question. Higher values indicate a higher popularity score. Prevalence scale questions are answered using a percent scale from 0 - 100% in 10% increments. A total prevalence scale (from 0 to 100) is calculated by averaging the responses to each question. Higher values indicate a higher prevalence score.

Measure: 11-item scale that measures social normative beliefs about smoking

Time: approximately 30 minutes post intervention

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Description: This 3-item instrument is used to predict which never smokers are likely to start smoking by measuring their curiosity to use tobacco products. Item responses are on a 4-point Likert scale (definitely yes, probably yes, probably not, definitely not). To classify a respondent as not susceptible to smoking, the respondent must indicate "definitely not" to all four items. Any other response to any item classifies a respondent as "susceptible."

Measure: A 3-item scale that measures adolescent smoking susceptibility

Time: approximately 30 minutes post intervention

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Secondary Outcomes

Description: Eye-tracking will be used to measure the total amount of time spent looking in realtime at smoking cues in TV commercials for e-cigarettes. The amount of time looking at smoking cues will be a measure of the amount of attention given to smoking cues. The longer the amount of time spent looking at smoking cues indicates that a greater amount of attention was given to the smoking cues.

Measure: Amount of time looking at dynamic smoking cues in e-cigarette advertisements

Time: During the intervention, approximately 15 minutes post baseline

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Description: Character Attributes will be collected using a scale that measures participants beliefs about character attributes using the lead in: "I think [Character Name] is: " using a 5-point Likert (1 = strongly disagree; 5 = strongly agree). There is a total of 6 attributes assessed: 1) smart (smart, intelligent, stupid), 2) successful (successful, achieves goals, gets what he/she wants), 3) attractive (physically attractive, ugly, good-looking), 4) funny (funny, humorous, makes me laugh), 5) respected (respected by others, receives approval, criticized by others), and 6) popular (has lots of friends, well liked, gets support from others). A total score (form 1 to 5) for each scale is calculated by averaging responses for each question within that scale. For each scale, a higher total score indicates higher beliefs about that attribute.

Measure: 18-item scale that measures character attributes of actors that appeared in the commercials

Time: approximately 30 minutes post intervention

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Description: This 5-item is scale is used to quantify how much a participant would like to be like an actor appearing in a commercial. Questions are rated on a 5-point Likert scale (1 = Strongly Disagree; 5 = Strongly agree). A total identification score (from 1 to 25) is calculated by summing the responses to each question. A higher total score indicates a higher level of wishful identification.

Measure: 5-item scale that measure how much participants wish to be like the actors appearing in the commercials.

Time: approximately 30 minutes post intervention

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Description: This 13-item scale measures risk perceptions associated with cigarette use. Questions are answered using a sliding percent scale from 0 - 100% in 10% increments. A risk perception scale is calculated (from 0 to 100) by averaging the responses to each question. Higher values indicate a higher risk perception.

Measure: 13-item scale to measure risk perception about cigarette use

Time: approximately 30 minutes post intervention

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Description: This 13-item scale measures risk perceptions associated with e-cigarette use. Questions are answered using a sliding percent scale from 0 - 100% in 10% increments. A risk perception scale is calculated (from 0 to 100) by averaging the responses to each question. Higher values indicate a higher risk perception.

Measure: 13-item scale to Measure risk perception about e-cigarette use

Time: approximately 30 minutes post intervention

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