Rationale: Electronic nicotine delivery systems (ENDS or e-cigarettes) share salient features of combustible smoking, such as inhalation and exhalation behaviors, and evidence indicates that first and second-generation ENDS generalize as smoking cues. The present study examined whether newer, tank-based third-generation ENDS ("mods") also evoke smoking urges, and whether enhancing the visibility of exhaled aerosol clouds-by increasing the e-liquid vegetable glycerin (VG) content-strengthens the cue salience of ENDS. Objectives: The objective was to assess the role of exhaled aerosol clouds on ENDS cue potency using a standardized laboratory paradigm designed to mimic real-world exposures Methods: Using a mixed design, young adult smokers (n=50; mean age 26.5 yrs; ≥5 cigarettes/ day) observed a study confederate drinking bottled water (control cue) and vaping an ENDS mod containing e-liquid with either high (73%) or low (0%) VG. Participants completed the Brief Questionnaire on Smoking Urges (BQSU) and visual analog scales (VAS) assessing cigarette and e-cigarette desire pre-and post-cue exposure. Results: Increasing the e-liquid content of VG enhanced the size and visibility of the exhaled aerosol clouds and evoked a greater increase in smoking desire and a more sustained increase in ecigarette desire relative to the low VG cue. Both cues elicited increases in smoking urges. These results remained after controlling for sex, prior ENDS experience, recent smoking behavior, and menthol preference. Conclusions: Observation of tank-based ENDS use generalizes as a smoking cue and its cue salience is strengthened by increasing the e-liquid content of VG to enhance the visibility of the exhaled aerosol cloud.

BackgroundExposure to the use of first, second and third generations of electronic cigarettes (e-cigarettes) elicits the desire to vape and smoke among observers, as well as facilitates smoking behaviour. Given the rapid rise in the popularity of the pod mod JUUL, we examined whether observing the use of this device would elicit similar responses in smokers. Exploratory analyses were also conducted to determine whether JUUL can act as a smoking cue for former smokers.MethodsThe sample consisted of 82 young adult participants (62 current smokers and 20 former smokers approximately 1 year smoke free). The study examined their response to observing use of bottled water (control cue) and JUUL (active cue) in a controlled laboratory paradigm. Both cues were delivered by a trained study confederate under the guise of a social interaction task, and participants completed mood and desire and urge surveys precue and postcue exposures.ResultsIn current smokers, exposure to the JUUL cue increased smoking urge and desire for a cigarette, mod/vape pen and JUUL, and two-thirds chose to smoke in the behavioural analogue task. In former smokers, the JUUL cue evoked modest and transient increases in desire for a cigarette and JUUL.ConclusionsThe use of JUUL affects the user and elicits responses in observers; this study is the first to demonstrate that exposure to JUUL use may act as a smoking cue and exposure to JUUL use may affect tobacco control efforts.

There remains a paucity of research quantifying alcohol's effects in drinkers with alcohol use disorder (AUD), particularly responses to very high alcohol doses (≥0.8 g/kg). As drinkers with AUD frequently engage in very heavy drinking (8 to 10 drinks/occasion), doses of ≤0.8 g/kg may lack ecological validity. The present study examined the feasibility, tolerability, and safety of administering a very high alcohol dose (1.2 g/kg) to non-treatment-seeking AUD participants. Methods: Sixty-one young adult AUD drinkers enrolled in the Chicago Social Drinking Project and completed 3 laboratory sessions at which they consumed a beverage with 1.2, 0.8, and 0.0 g/kg alcohol. Physiological responses (vital signs, nausea and vomiting, breath alcohol concentrations [BrAC]) were monitored throughout the sessions. After each session, participants completed a next-day survey of substance use, engagement in risky behaviors, and related consequences. Results: Overall, the sample demonstrated good compliance with study procedures; 93% of participants adhered to presession alcohol abstinence requirements (indicated by BrAC < 0.003 g/dl), with no participants exhibiting serious alcohol withdrawal symptoms at arrival to study visits. The 1.2 g/kg alcohol dose achieved an expected mean peak BrAC of 0.13 g/dl at 60 minutes after drinking, which was well tolerated; the majority of the sample did not experience nausea (70%) or vomiting (93%), and dose effects on vital signs were not clinically significant. Finally, we demonstrated that the 1.2 g/kg alcohol dose is safe and not associated with postsession consequences, including reduced sleep time, atypical substance use, accidents or injuries, and severe hangovers. Conclusion: Results support the feasibility, tolerability, and safety of administering a very high alcohol dose to young adult drinkers with AUD within the context of a well-validated laboratory alcohol challenge paradigm. Utilizing an alcohol dose more consistent with naturalistic drinking patterns may foster greater ecological validity of laboratory paradigms for persons with moderate to severe AUD.

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Objective: To describe child adherence to four preventative-health guidelines during the COVID-19 pandemic and investigate caregiver-level correlates of adherence. Method: Two hundred thirty-six caregivers (75% female) of children ages 6-12 years (M age = 8 years; 53% male) living in the United States rated child adherence to four preventativehealth guidelines between 10/16/2020 and 11/14/2020. Caregivers also rated perceived importance of each guideline in limiting virus spread and perceived difficulty in obtaining child compliance. Results: Child adherence was highest for mask-wearing (median [Mdn] = 96%) and hand hygiene (Mdn = 95%). Adherence to social distancing guidelines was lower. Mdn adherence for social distancing with family outside the household was 80%, and Mdn adherence for social distancing with friends was 72%. Furthermore, for each of the four guidelines, fewer than half the sample reported 100% adherence (range = 20%-43%). Adherence was positively associated with caregiver perceptions of importance of a given behavior in limiting virus spread (rs = .38-.62) and negatively associated with perceived difficulty in gaining child compliance (rs = -.37--.25). Discussion: Current results indicated parents perceive child adherence to social distancing more challenging than child adherence to mask wearing or hand hygiene. Lower caregiver perceptions of importance of the behavior and greater perceived difficulty in gaining child compliance were associated with lower adherence to all tasks. Brief targeted interventions (e.g., motivational interviewing, parent behavior management training) may be well suited to enhance caregivers' perceptions of value of the behavior, while also addressing behavioral challenges that interfere with child adherence.