Failure to induce aggression in inhibited and in genetically non-aggressive mice through injections of ethyl alcohol

Two kinds of nonaggressive mice were used as subjects: 1) males from a strain selectively bred for nonaggressiveness (TNA) and 2) males from a strain selectively bred for aggressiveness (TA) but made nonaggressive by defeats in fights. The aggressiveness of neither type of animal was increased by injections of ethyl alcohol in concentrations of 1 gm/kg and 1.5 gm/kg. Three series of experiments were performed. The results were incompatible with the assumption of a general physiological aggression-heightening effect of ethanol, and also with an assumption of removal by alcohol of learned inhibitions against aggression.     

Effects of different substance misuse in genital reflexes of paradoxical sleep deprived male rats

As psychostimulants are widely abused, their neurochemical and behavioral effects have been extensively studied for many years. Our previous data demonstrate that paradoxical sleep deprivation (PSD) enhances drug-induced penile erection and ejaculation. PSD in association to drugs of abuse like cocaine potentiated genital reflexes in male rats. In this sense, the present study investigated if three substances abused by young people--such as Delta(9)-tetrahydrocannabinol (Delta(9)THC), alcohol and caffeine--had any significant effect on the genital reflexes in PSD rats. The results indicated that PSD induced erection in 50% of the rats and 20% ejaculated. In addition, there was no significant alteration in the number of animals exhibiting genital reflexes neither on the frequency of these behaviors when challenged with Delta(9)-THC or alcohol or caffeine after 96 h of PSD. These findings show that Delta(9)THC, alcohol and caffeine when administrated isolated did not produce alterations in genital reflexes in the PSD male rats.     

Alcohol-aggression expectancies and dispositional rumination moderate the effect of alcohol consumption on alcohol-related aggression and hostility

Alcohol consumption increases aggression, but only in some drinkers. This study extends previous work to show how expectancies for alcohol-induced aggression and dispositional rumination moderate the link between alcohol consumption and alcohol-related aggression and hostility in a sample of 285 men and women. Alcohol-aggression expectancies and quantity of alcohol interacted to predict alcohol-related hostility and aggression. Trait rumination moderated the effect of alcohol consumption on aggressive acts. Finally, women who ruminated were more likely to report alcohol-related aggression than were men who ruminated. These results suggest that alcohol expectancies for aggression and rumination constitute two important cognitive facilitators of alcohol-related aggression and hostility, and that gender plays an important role in these relations.     

The alcohol-aggression link: children's aggression expectancies in marital arguments as a function of the sobriety or intoxication of the arguing couple

Children's expectancies of man-woman and woman-man aggression during arguments between individuals who were either intoxicated or sober were examined. The role of child and familial characteristics in influencing these expectancies was assessed. We examined children's expectations of interadult verbal/psychological and physical aggression during simulated arguments presented to children on videotapes. A community sample (N = 156) of children and young adolescents (6-14-year olds) participated. Children expected higher levels of aggression during conflict when they thought that one or both participants in conflict were intoxicated versus sober. Further, higher levels of verbal versus physical interadult conflict were expected during the disputes. These findings build on the literature by demonstrating that elementary school age children and young adolescents exhibit expectancies that link the consumption of alcohol with increased verbal and physical aggression in marital arguments. These alcohol-aggression expectancies were robust and were evident in relation to either the man's or woman's perpetration of aggression against the spouse. Elucidation of factors that can influence associations between aggression and alcohol consumption are of importance and have broad implications for family functioning.     

Different risk factors are associated with alcohol use versus problematic use in male Pakistani adolescents

Substance abuse is a significant problem in Pakistan (Hussain, 2017), yet, there are few studies of risk factors in this population, particularly in remote areas. Male adolescents (N = 243; M = 16.9 years, SD = 1.3 years) were recruited from schools in Gilgit-Baltistan, and completed questions on demographics, substance use, and psychosocial functioning. As a Muslim country, there are strict prohibitions against alcohol use, yet 44.9% of the sample reported lifetime alcohol use. The Alcohol Use Disorders Identification Test (Babor, Higgins-Biddle, Saunders, & Monteiro, 2001), was used to quantify level of risk associated with use, and 22.6% of the sample had scores indicating significant risk levels. Logistic regression analyses indicated that lifetime alcohol use was associated with internalising problems (e.g., depression, anxiety), while risky alcohol use was associated with externalising problems (e.g., aggressive and delinquent behaviour). Attention problems were related to both outcomes. Implications for prevention are discussed.     

Interactions between perinatal and neonatal associative learning defined by contiguous olfactory and tactile stimulation

Tactile stimulation of the neonate, as performed by the mother during and after delivery, has been described as an effective unconditioned stimulus during early ontogeny (Leon, 1987; Ronca & Alberts, 1994). The present experiments examined the interaction between perinatal and neonatal learning determined by the explicit association between alcohol odor and vigorous body stimulation of the perinatal organism. In Experiment 1, rat fetuses were exposed to either alcohol or saline 10 min prior to cesarean delivery. The alcohol administration procedure here employed was sufficient to provide sensory contamination of the amniotic fluid but avoid fetal alcohol intoxication. Pups in the two prenatal treatments later experienced the smell of alcohol, tactile stimulation, or both stimuli explicitly paired or unpaired. Other postnatal groups were composed of pups that had no explicit experience with either experimental stimulus. Pups subjected to alcohol odor in utero displayed more overall motor activity in response to that odor than saline controls. The increased motor responses were further potentiated in pups that experienced additional postnatal alcohol odor paired with tactile stimulation. In Experiment 2, pups were exposed to alcohol in the amniotic fluid 10 or 30 min prior to birth. As previously demonstrated the memory acquired in utero appears highly dependent upon contingency between exposure to this particular scent and delivery procedures. Pups in both prenatal treatment groups were then exposed to alcohol odor paired or unpaired with tactile stimulation. Some control animals received no further experience with either stimuli. Those pups exposed to alcohol odor paired with tactile stimulation both pre- and postnatally later showed maximum motor activity elicited by the odor of alcohol. The results support the notion of fetal associative learning comprising alcohol's chemosensory cues and behaviorally activating stimuli. Furthermore, the conditioned response under analysis is potentiated whenever neonates are reexposed to contingent presentations of the elements that defined the original associative memory.     

A test of theory of planned behavior in Korea: participation in alcohol-related social gatherings

Two studies are reported using the theory of planned behavior (TPB) to predict and explain joining and not joining alcohol-related social gatherings among Korean undergraduates in various engineering majors. Specifically, considering that the attitudinal component of TPB is behavioral-outcome-based, the current study investigated whether the outcomes of engaging in a behavior and of not engaging in a behavior would similarly predict intentions to engage in a behavior and intentions to not engage in a behavior. The current study also examined whether intentions to engage and intentions to not engage would be significantly related to self-reported behavior a week later. Participants in Study 1 reported TPB components (attitudes toward behavior, subjective norms, perceived behavioral control, and behavioral intentions) concerning joining alcohol-related social gatherings. Participants in Study 2 reported TPB components concerning not joining alcohol-related social gatherings. Additionally, a week later, the participants in both studies reported their participation in alcohol-related social gatherings from the past week. Generally, the results showed that the TPB components were significantly associated with undergraduates' intentions to join and intentions to not join. Specifically, conversation-related attitudes and senior-junior relationship-related attitudes were significantly related to intentions to join, and only group-related attitudes were significantly related to intentions to not join. Intentions to join and intentions to not join were not significantly related to self-reported behavior of joining alcohol-related social gatherings a week later. The findings from the current research provide some evidence that joining or not joining alcohol-related social gatherings may not be mere behavioral opposites, predictable by the presence or absence of the same behavioral outcomes. These two aspects of the behavior may require assessment of different behavioral outcomes or different assessments of the same behavioral outcomes.     

Social Information Processing Skills in Children with Histories of Heavy Prenatal Alcohol Exposure

Based on caregiver report, children with prenatal alcohol exposure have difficulty with social functioning, but little is known about their social cognition. The current study assessed the social information processing patterns of school-age children with heavy prenatal alcohol exposure using a paradigm based on Crick and Dodge’s reformulated six-stage model. Fifty-two children (aged 7–11) with and without heavy prenatal alcohol exposure were tested using a structured interview measure of social information processing involving 18 videotaped vignettes of children in group entry and provocation situations. Alcohol-exposed children displayed maladaptive processing patterns on the goal, response generation, and response evaluation steps in group entry situations, and encoding, attribution, response evaluation, and enactment steps during provocation situations. Children with heavy prenatal alcohol exposure also had difficulty on the Test of Problem Solving, and performance correlated with social information processing measures. Such difficulties may lead to problems in social functioning and warrant early intervention.     

Violence in the community—a study of violence and aggression in homelessness and mental health day services

This study examined violence and aggression in five agencies providing day services in homelessness or mental health. Incident reporting was used to test the hypotheses that aggression is associated with alcohol problems, drug use, mental disorder, homelessness, history of violence, age and sex. Agency policies and patterns to aggressive incidents were explored. Three agencies provided a sufficient number of incidents for analysis (involving 30 ‘aggressors’). A history of violence was associated with aggression in all three agencies; alcohol problems, drug use and younger age were associated with aggression in at least one agency; no association was found for mental disorder, homelessness or sex. A degree of pattern to incidents could be discerned, with drink or drugs often involved, and exercises of authority or intervention in client altercations being particularly likely to precede aggression towards staff. A variety of incidents were reported, from verbal arguments to threats with a knife and serious physical assault. © 1997 John Wiley & Sons, Ltd.