Matthew P. Bradstreet

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Experimental research is needed in investigating how early smoking abstinence affects relapse risk. The present study assessed the feasibility of promoting smoking abstinence using once- rather than thrice-daily abstinence monitoring and the relationship between different durations of initial abstinence and changes in smoking preference. Participants were(More)
Acute and enduring adverse effects of psilocybin have been reported anecdotally, but have not been well characterized. For this study, 1993 individuals (mean age 30 yrs; 78% male) completed an online survey about their single most psychologically difficult or challenging experience (worst "bad trip") after consuming psilocybin mushrooms. Thirty-nine percent(More)
Research is needed on initial smoking abstinence and relapse risk. This study aims to investigate the effects of different durations of initial abstinence on sensitivity to smoking-related stimuli and response inhibition in the context of a larger battery of outcome measures. Smokers were randomly assigned to receive payment contingent on smoking abstinence(More)
In this study we examined the association between social discounting and smoking status in a cohort of pregnant cigarette smokers (n=91), quitters (n=27), or never-smokers (n=30). The smokers and quitters were participants in clinical trials on smoking cessation and relapse prevention, while the never-smokers were controls in a study on nicotine withdrawal(More)
Acute adverse psychological reactions to classic hallucinogens ("bad trips" or "challenging experiences"), while usually benign with proper screening, preparation, and support in controlled settings, remain a safety concern in uncontrolled settings (such as illicit use contexts). Anecdotal and case reports suggest potential adverse acute symptoms including(More)
BACKGROUND Decreasing smoking during pregnancy is an important public health priority. An important step towards decreasing smoking during pregnancy is wider dissemination of evidence-based smoking cessation interventions. One such intervention is contingency management wherein mothers earn vouchers exchangeable for retail items contingent on biochemically(More)
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