Chimpanzees (Pan troglodytes) with better task-based delay of gratification skills are rated as less impulsive, more agreeable, and smarter.

Delay of gratification and inhibitory control are generally considered measures of self-control. In humans, individual differences in measures of self-control are associated with a host of behavioral, neurological, cognitive, and health-related outcomes. Self-control is not unique to humans and has been demonstrated in a variety of nonhuman species using a variety of paradigms. In this study, the effect of sex and age on delay of gratification performance, as measured by the hybrid delay task, was tested in a sample of 88 chimpanzees. Additionally, whether individual differences in hybrid delay task performance were associated with different aspects of personality was examined in this study. Contrary to reports in human subjects, geriatric male chimpanzees were found to perform more efficiently than adult males, while no age differences were found between geriatric and adult females. Indeed, delay of gratification efficiency was positively associated with age in males and negatively associated with age in females. Chimpanzees that performed more efficiently on the hybrid delay task were also found to be rated as more intelligent, more extraverted, and less impulsive. These findings suggest that objective measures of efficiency in delay of gratification tasks are associated with different dimensions of personality, which have some overlapping construct validity. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Practice Quit Attempts: Scoping Review of a Novel Intervention Strategy.

OBJECTIVE: Fostering practice quit attempts (PQAs)--that is, attempts to not smoke for a few hours or days, without pressure to permanently quit--represents a potential means to engage more individuals who smoke in efforts to change their smoking. However, little is known about interventions designed to foster PQAs. We aimed to identify the available evidence on PQA-focused intervention strategies and their impact on quit attempt and cessation outcomes. METHOD: We conducted a scoping review of behavioral and pharmacological treatment studies targeting PQAs among adult cigarette smokers. RESULTS: The systematic literature search yielded 3,879 articles, and the full-text review was narrowed to 86. Twenty-three studies were deemed relevant, and 5 were added through other sources, yielding 28 studies total. Fifteen studies included behavioral intervention techniques focused on the development and rehearsal of individualized coping skills, whereas eight studies provided brief advice/instruction. More than half of the PQA-focused interventions incorporated sampling of nicotine replacement products, through either guided or ad lib use. Five studies reported on PQA-focused digital health interventions that prompted brief abstinence challenges. Of eight large-scale controlled trials, six demonstrated an increase in quit attempt and cessation outcomes among the PQA-focused intervention group. CONCLUSIONS: Fostering PQAs through behavioral and pharmacological interventions offers a promising technique for cessation induction that warrants future research.

Posttraumatic stress disorder symptoms, relationship quality, and risky alcohol use among trauma-exposed students.

Individuals with posttraumatic stress disorder (PTSD) are at increased risk for alcohol use disorder (AUD), in part due to the use of alcohol as a coping strategy. High quality romantic relationships can buffer individuals against risk for psychopathology; however, no studies have evaluated romantic relationship quality in risk for PTSD-AUD in non-clinical samples. The current study examined the main and interactive effects of PTSD symptoms and romantic relationship quality on alcohol consumption (i.e., past 30-day alcohol use quantity, frequency, and binge frequency) and alcohol-related consequences in a sample of 101 college students (78.2% women) with a history of interpersonal trauma (i.e., physical/sexual assault, excluding intimate partner violence) who reported being in a romantic relationship. Relationship quality significantly moderated the association between PTSD symptom severity and alcohol use quantity (B = -0.972, p = .016) and alcohol-related consequences (B = -0.973, p = .009), such that greater PTSD symptoms were associated with greater alcohol use quantity and consequences among those low, but not high, in relationship quality. The interaction between PTSD symptom severity and relationship quality in relation to binge drinking was marginally significant (B = -0.762, p = .063), and relationship quality did not significantly moderate the association between PTSD symptom severity and alcohol use frequency. The main effect of PTSD symptom severity was significantly associated with alcohol-related consequences, but no other alcohol outcomes; the main effect of relationship quality was not associated with alcohol use outcomes or consequences. High quality romantic relationships may serve as a buffer for young adults at risk for alcohol problems.

Sex differences in tobacco withdrawal and responses to smoking reduced-nicotine cigarettes in young smokers.

RATIONALE: Policies that establish a standard for reduced nicotine content in cigarettes can decrease the prevalence of smoking in the USA. Cigarettes with nicotine yields as low as 0.05 mg produce substantial occupancy of nicotinic acetylcholine receptors (26%), but women and men respond differently to these cigarettes. OBJECTIVE: This study aimed to measure responses to smoking cigarettes that varied widely in nicotine yields, investigating whether sex differences in the effects on craving, withdrawal, and affect would be observed at even lower nicotine yields than previously studied, and in young smokers. METHODS: Overnight abstinent young smokers (23 men, 23 women, mean age 22.18) provided self-reports of craving, withdrawal, and affect before and after smoking cigarettes with yields of 0.027, 0.110, 0.231, or 0.763 mg nicotine, and evaluated characteristics of each cigarette. RESULTS: Compared to abstinent young men, abstinent young women reported greater negative affect, psychological withdrawal, and sedation, all of which were relieved equally by all cigarettes. Men but not women reported greater craving reduction, perceived nicotine content, and cigarette liking with increasing nicotine dose. CONCLUSIONS: Men may experience less smoking-related relief of craving, and enjoy cigarettes less, if nicotine yields are reduced to very low levels. Conversely, women respond equally well to cigarettes with nicotine yields as low as 0.027 mg as to cigarettes with nicotine yields 28-fold higher (0.763 mg). These differences are relevant for policy regarding reduced nicotine in cigarettes and may influence the efficacy and acceptability of reduced-nicotine cigarettes as smoking cessation aids.

Reduced-Nicotine Cigarettes in Young Smokers: Impact of Nicotine Metabolism on Nicotine Dose Effects.

The use of cigarettes delivering different nicotine doses allows evaluation of the contribution of nicotine to the smoking experience. We compared responses of 46 young adult smokers to research cigarettes, delivering 0.027, 0.110, 0.231, or 0.763 mg nicotine, and conventional cigarettes. On five separate days, craving, withdrawal, affect, and sustained attention were measured after overnight abstinence and again after smoking. Participants also rated each cigarette, and the nicotine metabolite ratio (NMR) was used to identify participants as normal or slow metabolizers. All cigarettes equally alleviated craving, withdrawal, and negative affect in the whole sample, but normal metabolizers reported greater reductions of craving and withdrawal than slow metabolizers, with dose-dependent effects. Only conventional cigarettes and, to a lesser degree, 0.763-mg nicotine research cigarettes increased sustained attention. Finally, there were no differences between ratings of lower-dose cigarettes, but the 0.763-mg cigarettes and (even more so) conventional cigarettes were rated more favorably than lower-dose cigarettes. The findings indicate that smoking-induced relief of craving and withdrawal reflects primarily non-nicotine effects in slow metabolizers, but depends on nicotine dose in normal metabolizers. By contrast, relief of withdrawal-related attentional deficits and cigarette ratings depend on nicotine dose regardless of metabolizer status. These findings have bearing on the use of reduced-nicotine cigarettes to facilitate smoking cessation and on policy regarding regulation of nicotine content in cigarettes. They suggest that normal and slow nicotine metabolizers would respond differently to nicotine reduction in cigarettes, but that irrespective of metabolizer status, reductions to <0.763 mg/cigarette may contribute to temporary attentional deficits.