Can Exposure to Brief Messages Correct Misperceptions?

NCT05129592 | Completed Results

• 1 other identifier: 00015120A
• Study Type: interventional
• Target: 193
• Locations: 1 country
• Sites: 1

Brief Summary

This study seeks to assess the efficacy of educational messages to correct misperceptions. A large proportion of the American population incorrectly believes that nicotine is the chemical responsible for causing cancer in tobacco products.1-3 This misconception may reduce the likelihood that established smokers who are unwilling or unable to quit tobacco product use completely will switch to less harmful non-combustible products. An online experiment will be used to test if corrective messages can reduce this misperception. The experiment will also test the effects of messages on beliefs about the relative harms of other tobacco products discussed in the message and accuracy of inferential beliefs. This will be accomplished by asking participants questions about two tobacco products that are not explicitly discussed in the messages. The experiment will test if the two components of "narrative coherence," a concept identified in previous reviews of misperception correction as effective,4-6 is effective at reducing misperceptions about nicotine. Component 1 provides an explanation for why the new information is correct and component 2 provides an explanation for how the false information came to be believed. This study will use a factorial design to test the efficacy of the component of coherence individually as well as together. Hypotheses and Research Questions: RQ1: Will participants exposed to different corrective message conditions differ in increased accuracy of beliefs (a) that nicotine does not cause cancer, (b) regarding the relative risk of e-cigarettes compared to cigarettes, (c) regarding the relative risk of very low nicotine cigarettes (VLNC) compared to cigarettes and (d) regarding the relative risk of nicotine replacement therapy compared to cigarettes. H1: Participants exposed to the nicotine corrective message with both components of coherence will be significantly more likely to increase accuracy of beliefs regarding the relative harms of (a) smokeless tobacco compared to cigarettes and (b) cigarillos relative to cigarettes compared to those exposed to messages with just one component or no components of coherence. H2: Participants exposed to the nicotine corrective message with both components of coherence will be significantly more likely to increase their intention to switch completely to a noncombustible product compared to those exposed to messages with just one component or no components of coherence.

Conditions

Beliefs

Outcome Measures

Primary Outcomes (7)

• Change in Accuracy of Belief That Nicotine Causes Cancer

  The extent to which participants agree or disagree with the following statement: The substance nicotine causes cancer. Response options are a continuous scale from 0 "I do not agree at all" to 100, "I completely agree."

  Baseline and up to 5 minutes after receiving the corrective message

• Change in Relative Harm Beliefs Regarding E-cigarettes

  "The next questions are about electronic cigarettes. You may also know them as e-cigarettes, vapes, vape pens, mods, or by brand names like Juul, Suorin, SMOK, Fin, NJOY, Blu, e-Go, or Vuse. Some look like cigarettes, and others look like small boxes, pens, or pipes. From now on, we will refer to these products as e-cigarettes. E-cigarettes heat up a liquid to aerosolize it so people can inhale it. Although some e-liquid does not contain nicotine, we are only interested in e-cigarettes that DO contain nicotine. Please answer the following questions about e-cigarettes that contain nicotine." Response options are, "Much less harmful," "Somewhat less harmful," "Not less or more harmful," "Somewhat more harmful," "Much more harmful." Response options were dichotomized to low relative harm perceptions (much less harmful, somewhat less harmful) and high relative harm perceptions (much more harmful, somewhat more harmful, not less or more harmful).

  Baseline and up to 5 minutes after receiving the corrective message

• Change in Relative Harm Beliefs Regarding NRT

  Participants will be shown a written description of NRT before answering questions about them: "The next questions are about nicotine replacement therapy (NRT). NRT is a medicine that is available as skin patches, chewing gum, nasal and oral sprays, inhalers, lozenges and tablets and delivers nicotine to the body. Nicotine replacement therapy is approved to help people quit smoking." Participants will also see a picture of these products with the description. Response options are, "Much less harmful," "Somewhat less harmful," "Not less or more harmful," "Somewhat more harmful," "Much more harmful." Response options were dichotomized to low relative harm perceptions (much less harmful, somewhat less harmful) and high relative harm perceptions (much more harmful, somewhat more harmful, not less or more harmful).

  Baseline and up to 5 minutes after receiving the corrective message

• Change in Relative Harm Beliefs Regarding Very Low Nicotine Cigarettes

  Participants will be shown a written description of very low nicotine cigarettes before answering questions about them: "The next questions are about very low nicotine cigarettes. A very low nicotine cigarette is a tobacco cigarette that is still smoked but has the vast majority (95% or more) of the nicotine removed from it. The average regular cigarettes typically contains 12-13 mg of nicotine. A very low nicotine cigarette could have less than 1 mg of nicotine in it. Very low nicotine cigarettes do not contain enough nicotine to maintain a physiological addiction to nicotine. Quest and Moonlight are brands of very low nicotine cigarettes." Participants will also see a picture of these products with the description. Response options were dichotomized to low relative harm perceptions (much less harmful, somewhat less harmful) and high relative harm perceptions (much more harmful, somewhat more harmful, not less or more harmful).

  Baseline and up to 5 minutes after receiving the corrective message

• Change in Inferential Beliefs Regarding Smokeless Tobacco

  Participants will be shown a written description of smokeless tobacco before answering questions about them: "The next questions are about smokeless tobacco. Smokeless tobacco like chewing, oral, or spit tobacco come as loose leaves, plugs, or twists of dried tobacco that may be flavored. It's chewed or placed between the cheek and gum or teeth. The user spits out (or swallows) the saliva that has soaked through the tobacco. Dissolvables are another type of product that dissolves in the mouth and can be sold as lozenges, strips, or sticks. Nicotine is absorbed through the mouth tissues." Participants will also see a picture of these products with the description. Response options were dichotomized to low relative harm perceptions (much less harmful, somewhat less harmful) and high relative harm perceptions (much more harmful, somewhat more harmful, not less or more harmful).

  Baseline and up to 5 minutes after receiving the corrective message

• Change in Inferential Beliefs Regarding Cigarillos

  Participants will be shown a written description of smokeless tobacco before answering questions about them: "The next questions are about cigarillos. Cigarillos look like small versions of traditional cigars, but can be bought in packages of one or two. Cigarillos smoke is often inhaled, unlike cigar smoke which is often held in the mouth and then released. Cigarillos are often flavored. Swisher Sweets, White Owl, and Dutch Masters are common cigarillo brands.." Participants will also see a picture of these products with the description. Response options were dichotomized to low relative harm perceptions (much less harmful, somewhat less harmful) and high relative harm perceptions (much more harmful, somewhat more harmful, not less or more harmful).

  Baseline and up to 5 minutes after receiving the corrective message

• Change in Beliefs About Intention to Switch Products

  The extent to which participants agree or disagree with the following statement: I would consider completely switching to a tobacco product that is not lit on fire rather than continuing to smoke cigarettes. Response options are a continuous scale from 0 "I do not agree at all" to 100, "I completely agree."

  Baseline and up to 5 minutes after receiving the corrective message

Study Arms (4)

Nicotine corrective control

ACTIVE COMPARATOR

A factual message about nicotine that does not contain a causal explanation for what actually causes tobacco-caused disease or an explanation for why the misperception that nicotine causes cancer may have come to be believed.

Behavioral: Coherent corrective messages

Nicotine corrective with causal explanation

EXPERIMENTAL

A factual message about nicotine that contain a causal explanation for what actually causes tobacco-caused disease: tar and chemicals created in tobacco smoke when tobacco is lit on fire.

Behavioral: Coherent corrective messages

Nicotine corrective with reason for misperception

EXPERIMENTAL

A factual message about nicotine that contains an explanation for why the misperception may have come to be believed: that health messaging often discuses nicotine and tobacco-caused disease at the same time and people incorrectly make the connection that nicotine causes cancer.

Behavioral: Coherent corrective messages

Nicotine corrective with both components of coherence

EXPERIMENTAL

A factual message about nicotine that contains both a causal explanation for what actually causes tobacco-caused disease and an explanation for why the misperception may have come to be believed.

Behavioral: Coherent corrective messages

Interventions

Coherent corrective messages BEHAVIORAL

Participants will be randomized to one of four message conditions: condition 1 will not contain either component of the coherence; condition 2 will contain one element of coherence (a causal explanation for why the corrective information is accurate); condition 3 will contain the other element of coherence (an explanation for why the misinformation came to be believed); condition 4 will include both elements of coherence.

Nicotine corrective control; Nicotine corrective with both components of coherence; Nicotine corrective with causal explanation; Nicotine corrective with reason for misperception

Eligibility Criteria

• Age: 21 Years - 99 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Are established smokers (have smoked at least 100 cigarettes in their lifetime and currently smoke some or all days)
• Are 21 years of age or older (the legal age of tobacco purchase in the US)
• Have not completed the cognitive interview during message pre-testing.
• Rate their agreement with the following statement as at least 50 out of 100: "To what extent do you agree with the following statement: The substance nicotine causes cancer."
• Are registered with MTurk in the United States.
• Have completed \>= 5,000 HIITs within the MTurk system
• Have a HIIT approval rating of \>= 97%

You may not qualify if:

• Are not established smokers
• Are younger than 21 years of age
• Participated in cognitive interviews during message pre-testing
• Are not registered with MTurk in the US
• Have completed \< 5,000 HIITS
• Have a HIIT approval rating of \<97%
• Rate their agreement with the following statement as less than 50 out of 100: "To what extent do you agree with the following statement: The substance nicotine causes cancer."

Sponsors & Collaborators

• Johns Hopkins Bloomberg School of Public Health: lead

Study Sites (1)

Johns Hopkins Bloomberg School of Public Health

Baltimore, Maryland, 21205, United States

Location

Limitations and Caveats

Smokers on MTurk are unlikely to be representative of US smokers. The nicotine misperception was measured on a continuous 0-100 scale and was able to detect smaller changes than the dichotomous relative harm perception outcome. Participants who reported believing nicotine causes cancer may accurately understand that nicotine indirectly causes disease because it keeps people exposed to carcinogens over time, resulting in misclassification.

Results Point of Contact

• Title: Caitlin Weiger
• Organization: Johns Hopkins Bloomberg School of Public Health

cweiger2@jhmi.edu

3017128357

Study Officials

• Meghan B Moran, PhD

  Johns Hopkins Bloomberg School of Public Health

  PRINCIPAL INVESTIGATOR

Publication Agreements

• PI is Sponsor Employee: No
• Restrictive Agreement: No

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: OTHER
• Intervention Model: FACTORIAL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Model Details: Participants will be randomized to view one of four messages. The message conditions are as follows: condition 1 will not contain either component of coherence; condition 2 will contain one element of coherence (a causal explanation for why the corrective information is accurate); condition 3 will contain the other element of coherence (an explanation for why the misinformation came to be believed); condition 4 will include both elements of coherence.

Study Record Dates

• First Submitted: October 1, 2021
• First Posted: November 22, 2021
• Study Start: November 22, 2021
• Primary Completion: January 30, 2022
• Study Completion: August 1, 2022
• Last Updated: March 12, 2024
• Results First Posted: March 12, 2024

Record last verified: 2024-03

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL, SAP, ICF
• Time Frame: 3 months following publication of the final article from this study

Locations

US (1)