Cognitive moderators of alcohol's effects on anxiety

The present study was designed to test the prediction from the attention-allocation model that intoxication in the absence of a pleasant distractor will fail to produce anxiolytic effects. A second prediction, that the sequence of intoxication and exposure to the anxiety-producing situation would influence alcohol's effects, was also tested. Subjects were male social drinkers who received an 0.85 g/kg dose of alcohol or a placebo. Conventional statistical analysis of the results indicated an anxiolytic effect of alcohol on heart rate but a problem with this analysis is identified. An alternative interpretation provides no support for an anxiolytic effect. Exposure to the anxiety-producing stimulus prior to intoxication led to greater heart rate reactivity than if it followed intoxication.     

Women''s yielding to social group pressure as a function of alcohol and type of pressure

Thirty-six women participated in an experiment exploring whether alcohol intoxication facilitates yielding to social persuasive information. Subjects were randomly assigned to either an Alcohol, a Placebo, or a Control Group. The alcohol dose was 1.0 ml of 100% alcohol/kg body weight. Subjects first estimated the length of a line and were then given faked feedback from either a male or a female peer reference group. This procedure was repeated 60 times. Analyses indicated that the Placebo group yielded more often than the Alcohol group irrespective of type of feedback. A measure of locus of control indicated no significant mean differences as a function of alcohol group but correlations between externality and yielding were strong for placebo subjects, that is, externally oriented placebo subjects yielded more than internally oriented placebo subjects. This was discussed in terms of feelings uneasiness caused by the discrepancy between feelings of intoxication and information about drink content.     

Alcohol use and stress in women: The role of prior vs. anticipated stressors

The present study investigated stress-related drinking in women. Alcohol consumption in response to stress and in anticipation of a stressor was examined to evaluate women's use of alcohol to cope with stress. Subjects were assigned to one of four conditions in a 2 × 2 factorial design in which order of alcohol consumption and stress task as well as stress level was manipulated. Findings indicate that subjects did not consume alcohol to cope with the effects of either a prior stressor or an upcoming stressor. These results suggest the need for further refinement of notions concerning women's use of alcohol to cope with stress.     

Alcohol, sexual arousal, and intentions to use condoms in young men: applying alcohol myopia theory to risky sexual behavior.

Data from 7 studies were aggregated to examine how reported sexual arousal and alcohol intoxication interact to affect attitudes and intentions toward engaging in unprotected sexual intercourse in college-age men (N = 358). When participants were in a sober or placebo condition, their self-reports of sexual arousal had no effect on their responses. When participants were intoxicated, however, those who felt sexually aroused reported more favorable attitudes, thoughts, and intentions toward having unprotected sex than did those who did not feel aroused. These findings support alcohol myopia theory (C. M. Steele & R. A. Josephs, 1990), which states that alcohol intoxication restricts attentional capacity so that people are highly influenced by the most salient cues in their environment. It is suggested that sexual arousal is a powerful internal cue that interacts with alcohol intoxication to enhance attitudes and intentions toward risky sexual behaviors.     

Police Perceptions of Alcohol Intoxication

The accuracy of police perceptions of alcohol intoxication was assessed by comparing officers' impressions of intoxication with quantitative Breathalyzer measurements of blood alcohol concentration (BAC). Eighteen police officers predicted the BACs of 36 students who had consumed either a high or low dosage of alcohol. Results indicated that the officers could not discriminate between students who had consumed either the high or low alcohol dosage. More specifically, the officers were reasonably accurate in their predictions of students in the low alcohol condition, but they strongly underestimated the degree of intoxication of students in the high dose condition.     

Effects of alcohol intoxication on metamemory and on retrieval from long-term memory

In a balanced-placebo design, people expected either an alcohol drink or placebo drink and consumed either alcohol (1 ml/kg) or placebo. Shortly thereafter, each person attempted to recall the answers to general-information questions (e.g., "What is the capital of Chile?"), made confidence judgments about the accuracy of recall, made feeling-of-knowing judgments on all nonrecalled items, and received a recognition test. Unanticipated outcomes included: Alcohol intoxication significantly hindered recall from long-term memory, contrary to previous conclusions that alcohol does not affect retrieval; people's expectancy of alcohol had no significant effect on memory or metamemory performance, contrary to its established effects on other kinds of performance; and alcohol intoxication produced no significant overconfidence in judgments about recall or in feeling-of-knowing judgments, contrary to the overconfidence produced in other kinds of judgments such as an intoxicated person's assessment of his driving ability. This last outcome implies that alcohol intoxication does not produce a general lowering of the threshold for confidence but rather has effects that are situation specific.     

Intact retention in acute alcohol amnesia

Research on alcohol amnesia has focused on memory processes that are disrupted during intoxication. The present experiment examined the possibility that certain memory processes might be resistant to the amnesic effects of alcohol. Intoxicated and sober subjects studied a list of 29 words. They were then given one of three different retention tests: free recall, identification of degraded words based on the procedure used by Warrington and Weiskrantz (1970), and yes/no recognition. As expected, free recall was significantly impaired by alcohol intoxication. In contrast, in the identification test, intoxicated subjects benefited to the same degree as sober subjects from prior exposure to the items. The two groups did not differ in immediate recognition memory. The results of the free-recall and identification tasks are similar to findings with chronic amnesic patients and suggest that perceptual fluency is not affected by alcohol, whereas elaborative processes supporting recall are particularly sensitive to disruption during intoxication. The failure to find recognition impairment at the level of intoxication used in this study distinguishes temporary alcohol amnesia from chronic amnesia.     

Alcohol intoxication and self-aggressive behavior

Nonexperimental field studies have demonstrated an association between alcohol intoxication and self-aggressive behaviors across the spectrum of lethality. Although these results are suggestive, it is not yet known whether alcohol intoxication is causally related to self-aggression. The authors therefore experimentally examined the effects of alcohol intoxication (mean blood alcohol concentration of .10) on a behavioral measure of self-aggression in men (N = 40). After consuming either an alcohol or a placebo drink, participants were provided the opportunity to self-administer shock during a task disguised as a reaction-time game, with self-aggression defined by the intensity of shock chosen. Half of the participants observed a self-aggressive model (a potential moderator of alcohol-related self-aggression). Independent alcohol and model effects were found, with alcohol accounting for over 30% of the self-aggression variance.     

Dynamic role of social support in the link between chronic stress and psychological distress.

How a chronic environmental stressor can interfere with the buffering effects of social support by eroding social support was analyzed in this prospective, longitudinal study. A classic buffering effect of support was found after 2 months of exposure to the stressor, household crowding. Crowded residents with low perceived support had greater increases in psychological distress than did crowded residents with high perceived support. However, after 8 months exposure the buffering effect disappeared. Moreover, greater crowding had become directly associated with lower support, which in turn was associated with greater increases in psychological distress. All analyses controlled for prior distress. Under some types of chronic stress, the buffering effects of social support may be short-lived because the stressor eventually erodes social support.     

Men's likelihood of sexual aggression: the influence of alcohol,sexual arousal,and violent pornography

Previous research findings have indicated that both alcohol intoxication and violent pornography exposure may contribute to increased sexual aggression by men. This study used an experimental paradigm to examine the effects of a moderate alcohol dose, alcohol‐related beliefs, and victim response on men's self‐reported likelihood of committing sexual aggression. A community sample of male social drinkers (N=84) participated in an experiment in which they read an eroticized rape depiction after completing an alcohol administration protocol. The stimulus story varied whether the victim, who initially expressed unwillingness to engage in sexual activity, expressed pleasure or distress in response to the man physically forcing her to perform several explicit sex acts. A path analytic model illustrated that participants' self‐reported likelihood of behaving like the sexual aggressor in the story was directly related to their own sexual arousal. Heightened sexual arousal was reported by participants who had consumed alcohol, those who read the victim‐pleasure story, and those who believed that drinking women are sexually vulnerable. Results suggest that sexual arousal to violent pornography, as influenced by acute alcohol intoxication and other factors, may be an important component of men's perceptions of their own sexual aggression likelihood. Aggr. Behav. 32:581–589, 2006. © 2006 Wiley‐Liss, Inc.     

Effects and aftereffects of stressor expectations

Is stressor exposure necessary to produce "stress" effects, or can these effects result from stressor anticipation alone? The present research explores whether it is possible to obtain "stress responses" during and after the period in which stressor exposure is being anticipated. In the first study, the expectation of submerging one's hand in ice water resulted in decreased frustration tolerance and increased blood pressure when compared with control groups not expecting this stressor. A second study replicated and extended these results to show that the expectation of control over the stressor ameliorates the negative impact of stressor expectation. The second study also examined the aftereffects of expectations. Particularly, it found that despite being relieved of the expectation that they would immerse their hand in ice water, subjects who had expected stressor exposure had decreased frustration tolerance when compared with either subjects who had expected a nonstressful procedure or those who had expected to have control over stressor termination. A third study, using noise as the expected stressor, replicated both the aftereffect of the anticipation period and the moderation of that effect by perceived control. The discussion (a) focuses on the implications of this work for understanding why aftereffects occur and (b) proposes that previously observed stressor exposure effects may in fact be postexpectation effects.     

Alcohol intoxicated witnesses' interpretation of social behavior in intimate partner violence

Alcohol intoxication affects social information processing, though research is scarce regarding how alcohol affected eyewitnesses' perception of social interaction within an applied forensic context. In the present study, the effects of alcohol intoxication on eyewitnesses' perception of interaction in intimate partner violence (IPV) were investigated. The participants (n = 152) were randomized to an experimental (alcohol) or control group (juice). After consumption, they viewed a filmed IPV scenario where both interacting parties were confrontational. Afterwards, they rated the involved parties' behavior. Several behaviors were perceived in a similar manner by intoxicated and sober participants, but intoxicated participants perceived both parties' attacking behaviors and some of the man's prosocial behaviors differently than sober participants. Hence, alcohol affected some, but not all, kinds of social behaviors investigated in the present study. This would be of interest to legal praxis and to future studies on intoxicated witnesses to interpersonal violence.     

Intoxication level and emotional response

We used affective modulation of the eye-blink component of the startle reflex to examine effects of three levels of alcohol intoxication and a no-intoxication control on emotional responses to pleasant, neutral, and unpleasant pictures. Non-problematic student drinkers (n=101; 48 female) were randomly assigned to intoxication groups. Normal inhibition of startle during exposure to pleasant pictures was intact across groups. In contrast, potentiation of startle during viewing of unpleasant pictures was evident in the no- and low-intoxication groups, compared to the intermediate- and high-intoxication groups, in which it was significantly reduced. This pattern suggests that a direct and selective anxiolytic effect of alcohol can occur at higher levels of intoxication without an analogous impact on response to emotionally positive stimuli at similar levels.     

Effect of neonatal handling on adult rat spatial learning and memory following acute stress

Brief neonatal handling permanently alters hypothalamic-pituitary-adrenal axis function resulting in increased ability to cope with stress. Since stress is known to affect cognitive abilities, in the present study we investigated the effect of brief (15 min) handling on learning and memory in the Morris water maze, following exposure to an acute restraint stress either before training or recall. Exposure of non-handled rats to the acute stress prior to training resulted in quicker learning of the task, than in the absence of the stressor. When acute stress preceded acquisition, male handled rats showed an overall better learning performance, and both sexes of handled animals were less impaired in the subsequent memory trial, compared to the respective non-handled. In addition, the number of neurons immunoreactive for GR was higher in all areas of Ammon's horn of the handled rats during the recall. In contrast, the number of neurons immunoreactive for MR was higher in the CA1 and CA2 areas of the non-handled males. When the acute restraint stress was applied prior to the memory test, neonatal handling was not effective in preventing mnemonic impairment, as all animal groups showed a similar deficit in recall. In this case, no difference between handled and non-handled rats was observed in the number of GR positive neurons in the CA2 and CA3 hippocampal areas during the memory test. These results indicate that early experience interacts with sex and acute stress exposure in adulthood to affect performance in the water maze. Hippocampal corticosterone receptors may play a role in determining the final outcome.     

Main and interactive effects of social support in predicting mental health symptoms in men and women following military stressor exposure

Abstract

Evidence across a multitude of contexts indicates that social support is associated with reduced risk for mental health symptoms. More information is needed on the effectiveness of different sources of support, as well as sex differences in support. Associations between social support from two sources – the military unit and friends and family – and mental health symptoms were examined in a study of 1571 Marine recruits assessed at the beginning and end of a highly stressful 13-week training program. Military social support buffered the stressor exposure–posttraumatic stress symptomatology (PTSS) relationship, whereas the relationship between stressor exposure and PTSS was highest when civilian social support was high. Further inspection of the interactions revealed that military support was most important at high levels of stressor exposure. Sex differences in the relationship between social support and symptoms were found, such that support from military peers was associated with lower levels of PTSS for men, whereas civilian support was associated with lower PTSS for women. While civilian social support was associated with lower levels of depression symptom severity in both women and men, the relationship was stronger for women. Reviewed implications focus on the importance of considering the recipient, source, and context of social support.     

THE EFFECTS OF DEFENDANT AND COMPLAINANT INTOXICATION ON MOCK JURORS' JUDGMENTS OF SEXUAL ASSAULT

The present study investigates the impact of participant gender, rape-myth beliefs, and alcohol intoxication on the part of either the defendant and/or alleged victim on mock jurors' decisions within the context of a sexual-assault trial. Participants ( N = 152) were exposed to a sexual-assault case in which the beverage consumption (alcohol, cola) on the part of both the defendant and complainant prior to the sexual intercourse was varied systematically. Results indicated that when the defendant had consumed alcohol, as opposed to cola, participants were more likely to view the case as one of assault, to perceive the defendant as less credible, and to find the defendant guilty. When the complainant had consumed alcohol, as opposed to cola, participants found the complainant's claim less credible and were less likely to view the defendant as guilty. In addition, participants' rape-myth acceptance, which was related to guilt, mediated the relation between gender of participant and guilt.     

The effects of alcohol and the salience of aggressive cues on triggered displaced aggression

Alcohol increases the aggression-augmenting effects of provocation. Theories of alcohol and aggression suggest that impaired cognitive processing induced by acute intoxication leads individuals to process aggression-inducing social cues differently depending on whether they are high or low in salience. We examined the effects of intoxication and aggressive cue salience within the triggered displaced aggression paradigm. An ethnically diverse sample of 74 primarily young adult participants (40 men and 34 women; M=23.28, SD=3.14 years) were recruited from the university community and surrounding area. All participants were provoked by an experimenter, randomly assigned to a 2 (alcohol condition: alcohol vs. placebo) x 2 (trigger salience: high vs. low salience) between-subjects design, and then given the opportunity to aggress against the undeserving triggering agent. As expected, intoxication combined with a salient triggering cue elicited the most displaced aggression among all conditions. These results provide the first evidence that the effect of alcohol on triggered displaced aggression is moderated by the salience of the triggering event.