Experimental and clinical psychopharmacology最新文献

The study aimed to investigate to what extent acute moderate doses of alcohol affect the speed of endogenous versus exogenous attentional shift times. Subjects viewed an array of 10 moving clocks and reported the time a clock indicated when cued. Target clocks were indicated by cues, presented peripherally at the target clock or centrally pointing toward a target clock, including conditions of where the target location was cued in advance, that is, precueing. This allowed assessing shift times when attention was preallocated, when peripheral cues triggered exogenous attention shifts, and when central cues triggered endogenous attention shifts. Each subject participated in two sessions (alcohol/placebo), whereby the order of alcohol/placebo intake was counterbalanced across subjects, and subjects were blinded to conditions. Confirming previous results, we show that precuing resulted in the fastest shift times, followed by exogenous cuing, with endogenous attentional shifts being slowest. Alcohol increased attentional shift times across all three conditions compared to placebo. Thus, the detrimental effects of alcohol on attentional shift times did not depend on the type of attention probed. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

This study prospectively examined the interplay of culturally ingrained beliefs regarding the benefits of substance use, social milieu featured by disengaged parents and deviant friends, and behavior undercontrol on the development of substance use disorder (SUD) by early adulthood. The sample at baseline consisted of 497 youths between 10 and 12 years of age. Subsequent evaluations were conducted when the participants attained 12-14, 16, and 22 years of age. The research protocol was composed of self-report, informant report, and performance measures. Positive beliefs about substance use effects were evaluated using the Adolescent Alcohol and Drug Expectancy Questionnaire. The social milieu was characterized by the environtype index encompassing parental engagement and normative behavior of friends. Behavior control was quantified using the neurobehavior disinhibition scale. Substance use frequency and intensity of reward experience during consumption were recorded using the Drug Use Screening Inventory and the Substance Use Questionnaire. The outcome variable, lifetime SUD, was diagnosed using the Structured Clinical Interview for Diagnosis. Structural equation modeling evaluated the association among these variables. Beliefs regarding the benefits of consumption mediated the associations of childhood social milieu with substance use frequency and reward intensity during the transition into adolescence. Reward intensity during this developmental period predicted consumption frequency and severity of behavior undercontrol in midadolescence, which conjointly predicted SUD by early adulthood. This study demonstrated that SUD manifested by early adulthood culminates from the coaction of acquired cultural beliefs, social context facilitating access to addictive chemicals, and suboptimal psychological self-regulation. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

Traditional cigarette purchase tasks (CPTs) assess cigarette demand as a function of monetary costs, neglecting the role of time as a cost in consumption decisions. This study introduces the cigarette purchase task-time (CPT-T), a novel measure designed to evaluate cigarette demand as a function of time costs. In Experiment 1, the participants (N = 50) completed the standard CPT with quantitative and probabilistic (CPT-P) response scales across three hypothetical delay conditions. Demand intensity decreased as delays increased, indicating that time functioned as a cost in cigarette consumption. In Experiment 2, the participants (N = 50) completed the CPT-P across three delay conditions and the CPT-T across three monetary conditions. Experiment 2 confirmed that increasing either time and monetary costs reduced demand intensity, breakpoints, and other demand indices, consistent with the law of demand. Experiment 3 evaluated the specificity and discriminant validity of the CPT-T by comparing demand across different reinforcers (cigarettes, potato chips, and toilet paper) between people who smoke (n = 50) and people who do not smoke (n = 50). People who smoke showed higher cigarette demand relative to people who do not smoke. Cigarette demand and toilet paper demand were higher than potato chips among people who smoke, but toilet paper demand was higher than cigarettes and potato chips for people who do not smoke, indicating that people who smoke view cigarettes as more essential. Together, these results showed that time acted as a cost in the demand for reinforcers. The CPT-T captured cigarette demand as a function of time costs and showed specificity and discriminant validity. These results open new theoretical avenues for our understanding of substance use disorders as a reinforcer pathology. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

There is growing evidence that poor sleep contributes to increased alcohol use and related impairment among college students (DeMartini & Fucito, 2014), with heavy drinking exacerbating these effects. Efforts to reduce this impact via online personalized feedback interventions (PFIs) have had limited success, and there is a dearth of research on attempts to simultaneously address these concerns among college students using brief, web-based interventions. The present study assessed intervention efficacy in addition to the impact of sleep disturbance on alcohol outcomes using a novel, brief, online PFI for sleep problems among college students who drink heavily. Participants were randomly assigned to one of the three interventions: PFI-Alcohol (n = 66), PFI-Alcohol-Sleep (n = 64), or assessment-only control (n = 66). Alcohol use, related impairment, and sleep problems decreased from baseline to 1-month follow-up under all conditions. However, participants under the control condition endorsed greater alcohol use during follow-up compared with intervention conditions. Notably, baseline insomnia symptoms predicted follow-up alcohol problems (but not use) when accounting for variance attributable to baseline negative affect, condition, and sex. More work is needed to examine the impact of brief online PFIs that concurrently target alcohol use and sleep problems among college students to determine its impact on reducing related-problems in this population. Results highlight the need for further investigation of the incorporation of sleep components within online alcohol PFIs to reduce heavy drinking and sleep problems among college students. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

There is potential to use public posts on social networking sites (SNS) to screen for problematic alcohol use. This study investigated how frequency of public posting about alcohol on SNS relates to alcohol outcomes among young adults (YA) not attending 4-year college. We also explored associations for racial/ethnic and gender subgroups. Participants were 501 non-college-attending YA, aged 18-29, living in the United States. Participants were recruited via Qualtrics Panels and completed measures of demographics, SNS use (past-3-month frequency of public posting about alcohol on Instagram, TikTok, "X"), and alcohol-related outcomes: heavy episodic drinking frequency (HED), high-intensity drinking episodes (HID), U.S. Alcohol Use Disorders Identification Test total (USAUDIT), and alcohol consequences. Regression models tested hypothesized associations between frequency of public posting and alcohol outcomes. Subsequent models assessed simple effects by race/ethnicity (Hispanic, Black, White) and gender (man, woman). Controlling for covariates, more frequent public alcohol-posting was associated with higher USAUDIT, HED frequency, and HID likelihood, not consequences. For Hispanic YA, posting was positively associated with all outcomes except consequences. For Black YA, posting was positively associated with USAUDIT and HID, not HED or consequences. For White YA, posting was positively associated with USAUDIT and HED, not HID or consequences. For women, posting was positively associated with USAUDIT total, HID, and consequences. For men, posting was positively associated with USAUDIT and HED. In conclusion, more frequent public alcohol-posting on SNS was positively associated with past-year alcohol use and problems, implying potential to screen for hazardous drinking via public SNS posts, among non-college-attending YA. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

Interoceptive drug states have been increasingly recognized as important cues that may help regulate intake by disambiguating postintake outcomes. While drug states signaling rewarding or reinforcing effects may occasion drug-taking and drug-seeking, states signaling aversive effects may be critical for terminating a drug-taking episode. Given that drug intake often becomes dysregulated with extensive exposure, the present study investigated whether chronic drug exposure impairs the function of interoceptive drug states to occasion avoidance. Male Sprague Dawley rats were trained in a discriminated taste avoidance procedure in which morphine (10 mg/kg, intraperitoneally) signaled that a saccharin solution would be followed by the illness-inducing agent lithium chloride, while the drug vehicle signaled that saccharin would not be followed by lithium chloride. Rats were then exposed to chronic morphine (CM) or chronic vehicle for 20 days. Morphine-induced stimulus control was tested at three doses (0, 5, and 10 mg/kg) following chronic exposure and a 3-week morphine-free period (dissipation of tolerance). Forty-five of the 49 rats acquired the discrimination, avoiding saccharin when it was preceded by morphine and consuming saccharin when it was preceded by saline. Chronic vehicle-exposed rats displayed dose-dependent avoidance on a subsequent test, while CM-exposed rats displayed no avoidance at any dose. Following a 30-day washout during which morphine was no longer administered, subjects in group CM injected with 10 mg/kg morphine avoided saccharin, displaying a partial recovery of discriminative control. These findings provide a baseline for the attenuating effects of chronic drug exposure on the drug's interoceptive control of avoidance. Further, by demonstrating that interoceptive control recovers after abstinence, the results suggest that tolerance may contribute to such impairment. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

Individuals with substance use disorder (SUD) show consistently higher delay discounting (DD) rates than controls for both future and past outcomes, as well as for gains and losses. However, differences in these DD effects (e.g., tense and sign) among individuals in SUD recovery have yet to be explored. Therefore, the goal of the present study was to (a) investigate differences in discounting of past and future gains and losses among individuals in SUD recovery and (b) examine differences in these DD effects between individuals in different stages of remission (i.e., not in remission, in early remission, or in sustained remission). Our results indicate that individuals in recovery discount past and future gains, but not losses, symmetrically. Additionally, individuals in recovery discount gains more than losses (i.e., sign effect) for the future but not for the past. Finally, those in sustained remission showed significantly lower DD rates than those not in remission, regardless of the DD task. Thus, other discounting tasks might provide a similarly accurate measure of DD and can be employed to assess differences in discounting between those in remission and those not in remission. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

Existing evidence relates internalizing psychopathology to nonfatal opioid overdose. Identifying variables that account for associations between internalizing symptomology and overdose could improve clinical conceptualizations of overdose risk and inform testable, mechanistic hypotheses. Mood-based facets of impulsivity, such as negative and positive urgency, are promising candidate variables that have been linked to both internalizing symptoms and negative substance use outcomes. Therefore, the present study tested whether these facets accounted for internalizing-overdose associations. We conducted a secondary, cross-sectional data analysis of lifetime opioid-exposed patients presenting to three large, urban emergency departments in Ohio. Bivariate associations between measures of internalizing conditions, mood-related urgency, and nonfatal opioid overdose were calculated, and the extent to which negative and positive urgency accounted for associations between internalizing constructs and nonfatal opioid overdose was examined. To determine the specificity of findings, we compared results to other impulsivity facets and models testing internalizing-impulsivity interactions. Negative urgency demonstrated a unique role in accounting for relationships between internalizing constructs and lifetime nonfatal opioid overdose. No other impulsivity facet, including positive urgency, reliably accounted for internalizing-overdose relations. No internalizing-urgency interactions were observed. Negative urgency was the only facet to reliably explain overlap in internalizing-overdose associations. Overdose-prevention efforts should consider the dual roles of internalizing symptoms and negative urgency as risk factors for opioid overdose. Implications for testing causal hypotheses are discussed. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

Smoking prevalence in the United States has stabilized as the remaining population becomes increasingly representative of "at-risk smokers" who are unable to quit. The experience of severe fatigue may be one underrecognized but highly common problem that may help in understanding smoking maintenance and relapse. Yet, there has been no research on fatigue severity in relation to smoking behavior measured in "real time." The purpose of the present study was to provide a pilot test of fatigue severity in the context of smoking deprivation in predicting number of puffs, puff velocity, interpuff interval, and smoking urges during an experimental relapse analogue task. Participants in the present study included 36 (Mage = 49.25 years, SD = 8.83; 54.1% male) daily cigarette smokers who reported prolonged fatigue. Results indicated that there was a statistically significant interactive effect between smoking deprivation and fatigue severity in the prediction of interpuff interval, such that those with greater fatigue severity, when smoking deprived, evinced greater time between puffs. Other analyses documented meaningful effect sizes for fatigue severity, but due to the sample size, results were generally not statistically significant. This pilot test found some empirical evidence for the continued study of fatigue severity as an individual difference factor relevant to smoking maintenance and relapse in an experimental context. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

Alcohol use disorder is prevalent, and various risk factors inform drinking onset and drinking patterns. Existing data suggest that alcohol sweet taste preference may be associated with harmful levels of alcohol use and alcohol-related harm. The present exploratory study aimed to characterize people's first alcohol use experience, probe the association between sweet taste preferences and drinking patterns over time, and evaluate the relationship between sweet taste preferences and behavioral economic variables. Participants (N = 277) were recruited through Prolific and completed an assessment of first alcohol exposure, current and historic drinking patterns, alcohol demand, and delay discounting. Participants reporting preference for less sweet alcohol beverages consumed the most drinks per week both currently and during their period of the heaviest use. Trends emerged such that rank order decreases in alcohol consumption were observed from those reporting transitioning from sweet to less sweet preference, then less sweet to sweet preference, and finally consistent sweet taste preference reporting the lowest consumption. Similar associations were observed for alcohol use disorder symptoms counts and alcohol demand intensity. These data broadly suggest that sweet taste preferences in alcohol consumption may serve as an important factor modulating patterns of alcohol use across the lifespan. In terms of translational implications, these data suggest that commonly used sucrose fades in preclinical research may reflect the trend in taste preferences of the majority of the population but do not mirror the typical onset (or course) of chronic, maladaptive drinking behaviors. (PsycInfo Database Record (c) 2025 APA, all rights reserved).