Now <Emphasis Type="Italic">Everyone</Emphasis> Looks the Same: Alcohol Intoxication Reduces the Own-Race Bias in Face Recognition

Several factors influence the reliability of eyewitness identification evidence. Typically, recognition for same-race faces is better than for different-race faces (the own-race bias), and alcohol intoxication decreases overall face recognition accuracy. This research investigated how alcohol intoxication influences the own-race bias. Asian and European participants completed tests of recognition memory for Asian and European faces when either mildly intoxicated (mean breath alcohol concentration of .05) or when sober. Compared to their sober counterparts, intoxicated participants showed a reduced own-race bias. Specifically, alcohol intoxication had a larger negative effect on the recognition of same-race faces compared to different-race faces. The legal and theoretical implications of these results are discussed.     

Intoxicated eyewitnesses: Better than their reputation?

According to law enforcement, many witnesses are intoxicated either at the time of the crime, the interview, or both (Evans et al., Public Policy Law 15(3):194-221, 2009). However, no study to date has examined whether intoxicated witnesses' recall is different from sober witnesses' and whether they are more vulnerable to misinformation using an ecologically valid experimental design. Intoxicated, placebo, and sober witnesses observed a live, staged theft, overheard subsequent misinformation about the theft, and took part in an investigative interview. Participants generally believed they witnessed a real crime and experienced a real interview. Intoxicated witnesses were not different from placebo or sober witnesses in the number of accurate details, inaccurate details, or "don't know" answers reported. All the participants demonstrated a misinformation effect, but there were no differences between intoxication levels: Intoxicated participants were not more susceptible to misinformation than sober or placebo participants. Results are discussed in the light of their theoretical and applied relevance.     

Alcohol intoxicated eyewitnesses' memory of intimate partner violence

Alcohol affects memory in many, and mostly negative, ways. This is a problem in legal contexts as many witnesses are alcohol intoxicated when taking part of the critical event. However, research is sparse regarding how, and under what circumstances, the reports of alcohol intoxicated witnesses differ from those of sober witnesses. This study investigated whether alcohol intoxicated and sober eyewitnesses differ regarding completeness, accuracy, and type of information reported, as well as whether gender influenced these variables. Eighty-seven healthy men (n = 44) and women (n = 43) received either an alcoholic beverage (0.7 g/kg) or a control (juice) in a laboratory setting before viewing a film picturing intimate partner violence. Ten minutes after viewing the film, they were interviewed. Reports by alcohol intoxicated women were less complete, but as accurate, as sober women's. In contrast, intoxicated and sober men did not differ regarding completeness or accuracy. Furthermore, compared with sober women, intoxicated women reported fewer actions but no difference was found between the groups regarding reported objects. At this moderate dose, alcohol affected women's reports more than men's, which may be because alcohol affects attention and memory consolidation more clearly at a lower dose for women than for men.     

Intoxicated eyewitnesses: prevalence and procedures according to England’s police officers

Despite the apparent role alcohol plays in criminal offences, there is at present no evidence available as to the extent of the problem of intoxicated witnesses within England. To address this lack of research, police officers from seven constabularies completed an online survey addressing issues such as the prevalence of intoxicated witnesses, how officers determine intoxication, the procedures employed and their effectiveness. Officers indicated that intoxicated witnesses were a common, to very common, occurrence with most officers determining intoxication through physical symptoms and the witness’s own admission. In terms of interviewing witnesses, the majority of officers indicated that initial details were taken whilst witnesses were intoxicated, but the evidential interview was taken when sober. Officers also indicated that if the witness was intoxicated then the case was less likely to proceed to court and that officers viewed the witness as less accurate. These findings are considered from a criminal justice perspective and discussed in relation to future research.     

Attributions of responsibility,blame and justifiability to a perpetrator and victim in an acquaintance rape scenario: the influence of Marijuana intoxication

Abstract

Marijuana is a commonly used illicit drug by young adults and has been implicated in about one third of sexual assaults. However, the influence of Marijuana intoxication on rape attributions has not been previously investigated. This study examined the effects of perpetrator and victim Marijuana intoxication and participant sex on rape attributions. Young adults (N = 285) read an acquaintance rape scenario where Marijuana intoxication was manipulated and completed measures of perpetrator (responsibility, blame and justifiability) and victim attributions (responsibility and blame). The results revealed that an intoxicated, compared to sober, perpetrator was attributed less responsibility for his sexual aggression. When the victim was intoxicated, compared to sober, the perpetrator and victim were attributed less and more blame for the assault, respectively. These findings demonstrate that, irrespective of perceiver sex, Marijuana intoxication, like alcohol intoxication, results in an attributional double standard in favour of the perpetrator.     

Handwriting of the alcoholic

Alcohol intoxication produces abnormal handwriting with manifestations that are thoroughly described in the literature of forensic science. A less known phenomenon is the peculiar handwriting changes found in alcoholics, especially individuals in the later stages of the disease. In addition to the two handwriting states of non-alcoholic drinkers (normal/sober and intoxicated) the alcoholic writer has a third state, handwriting done in withdrawal. Withdrawal is a state of tension resulting in handwriting characterized by irregularity, ataxia and tremor. This type of abnormal handwriting creates special problems of authentication requiring detailed background history and appropriate comparison specimens, but it can also be used to judge the writer's state of sobriety.     

Drunk Person Screening using Eye Thermal Signatures

Temperature distribution on the eyes of drunk persons is studied by means of thermal infrared images. The sclera and the iris are of the same temperature for the sober person, while for the intoxicated person, the sclera temperature increases. Consequently, only the thermal images from the drunk persons are necessary for intoxication screening. Forty‐one participants drank in a controlled alcohol consumption procedure. Their breath alcohol concentration was above the threshold of 0.2 mg/L of exhaled air, which corresponds to about 0.5 mg of alcohol per cubic centimeter of blood. Histogram modification algorithms were employed to prove that for 36 among the 41 intoxicated persons, the sclera becomes hotter. The Student t‐test verified with over 99% confidence the drunk discrimination capabilities of the procedure. The forensic science potential contribution of the method is that face infrared imagery is available to the authorities for supporting intoxication in case of criminal actions.     

Fatigue in single car fatal accidents

In a reexamination of 101 fatal single car accidents without any reasonable explanation besides possible intoxication, 50 drivers were found to have been intoxicated with a blood alcohol content (BAC) of more than 0.08 mg% at the time of the accident. Thirty-seven of these accidents happened between 2400 h and 0600 h in the morning and 21 of the drivers were found to be intoxicated. The remaining 64 accidents took place during the rest of the day and 21 drivers were found to be intoxicated. By comparing this apparent over-representation of intoxicated drivers in night-time accidents with that of a control group of no less than 15.923 drivers it was possible to convert this over-representation into a significant under-representation indicating another human accident factor specific to night-time traffic. It is concluded that fatigue is an often overlooked but most obvious cause to an otherwise unexplainable accident in the night-time traffic.     

Fatigue in multiple-car fatal accidents

In a re-examination of 334 fatal multiple car accidents, without any reasonable explanation besides possible intoxication, 205 drivers were found responsible for the accident. Twenty-one of these accidents happened between midnight and 0600 h and 11 of the drivers were found to be intoxicated with a blood/alcohol content (BAC) of more than 0.080%. The remaining 184 accidents took place during the rest of the day and 55 drivers were intoxicated. By comparing this apparent over-representation of intoxicated drivers in night-time accidents with that of a control group of no less than 15,923 drivers, it was possible to convert this over-representation into an under-representation. This decline in accidents while under influence seems to indicate another human accident factor specific to night-time traffic. It is concluded that fatigue is an overlooked but most obvious cause of otherwise unexplainable accidents in the night-time traffic.     

Rape-myth congruent beliefs in women resulting from exposure to violent pornography: effects of alcohol and sexual arousal

Previous research findings indicate that women suffer a variety of detrimental effects from exposure to violent pornography. This study used an experimental paradigm to examine the effects of a moderate alcohol dose and alcohol expectancies on women's acute reactions to a violent pornographic stimulus. A community sample of female social drinkers (N = 134) read an eroticized rape depiction after completing an alcohol administration protocol. As predicted, intoxicated participants were less likely to label the depicted events as rape than their sober counterparts. A path analytic model illustrated that participants' self-reported sexual arousal to the stimulus, as influenced by alcohol consumption and expectancies, resulted in increased rape myth congruent perceptions of the victim and decreased labeling of the incident as rape. Findings suggest that acute alcohol intoxication during violent pornography exposure may ultimately result in women developing more calloused attitudes toward rape and rape victims.     

Mock jurors' perceptions of identifications made by intoxicated eyewitnesses

Abstract

Psychology research has generally neglected intoxicated eyewitnesses. The current study addressed this need by exploring mock jurors' perceptions of intoxicated witnesses. Undergraduate participants read summarized sexual or aggravated battery cases in which either the victim or a bystander identified the defendant under varying intoxication levels. They answered questions about the case and provided verdicts. Participants were sensitive to the effect that intoxication may have on witnesses' cognitive ability, but not to varying degrees of intoxication. Neither the role of the eyewitness nor the type of crime committed had an effect on perceptions of witness impairment. Participants' perceptions of witness impairment informed identification credibility ratings, and credibility assessments affected verdicts. Impairment and credibility ratings fully mediated intoxication's effect on verdicts. Unlike much prior research, our results suggest that mock jurors can consider potentially important witness information when rendering verdicts.     

Sleep deprivation does not mimic alcohol intoxication on field sobriety testing

Previous research shows that sleep deprivation (SD) produces cognitive impairment similar to that caused by alcohol intoxication. Individual studies suggest that SD also causes deficits in motor skills that could be mistaken for intoxication. Consequently, SD often is used as a defense when an impaired driver is charged with driving while intoxicated. Twenty-nine adult subjects participated in two test sessions each, one after a full night's rest and the other after wakefulness of at least 24 h. Subjects consumed prescribed amounts of alcohol during each session. Law enforcement officers conducted field sobriety tests identical to those with which a driver would be assessed at roadside. Researchers also measured clinical responses of visual function and vital signs. The presence and number of validated impairment clues increase with increasing blood alcohol concentration but not with SD. Thus, SD does not affect motor skills in a manner that would lead an officer to conclude that the suspect is intoxicated, unless intoxication also is present.     

Is It a Fight or Are They Just Drunk? Attributions about Drunken Behaviour in a Hypothetical Male‐to‐Male Aggression Scenario1

Objective. This paper examines the excuse‐value of alcohol in a hypothetical provoked male‐to‐male violence scenario. There are two main questions. Does intoxication result in decreased blame? Does intoxication lessen the propensity to call the police?

Methods. 1004 random digit dialing (RDD) quantitative telephone surveys were completed with Swedes aged 16–25. The response rate was 73.8%. Besides the aggressor's intoxication, severity of the outcome, the victim's intoxication and the respondent's hypothetical relationship to the aggressor or to the victim were also randomly manipulated. Whether the police should be called and the attribution of blame to the aggressor have been analysed using ANOVA in SAS.

Results. Analyses were stratified by sex. For male respondents, the aggressor's intoxication interacted (four‐way) with all the manipulated variables in predicting the attribution of blame. In the more severe act, intoxication tended to reduce blame; the least amount of blame was assigned when both the aggressor and the victim were intoxicated. For female respondents, the aggressor's intoxication was involved in a three‐way interaction. For them also, intoxication decreases the blame for the severe acts but not for the less severe acts. The aggressor's intoxication had very little effect on whether the police should be called or not.

Discussion. Intoxication provides some excuse from blame but only for certain acts and under certain circumstances. It also changes the way people perceive acts of violence.     

Injuries due to deliberate violence in areas of Denmark. IV. Alcohol intoxication in victims of violence. The Copenhagen Study Group

A material of 1316 victims of deliberate violence was collected prospectively during a one year period in three Danish emergency wards covering a provincial/rural area and two metropolitan areas. The frequency of alcohol intoxication was determined. Forty-one percent of the patients were intoxicated. The highest frequency was found in male victims, in the provincial/rural area, in restaurants or their vicinity, in the age group 35-49, during evenings and nights and in May. It is difficult to indicate specific preventive measures. However, a more restrictive attitude is suggested with regard to serving alcohol to intoxicated persons in restaurants.     

Recollections of a robbery

One week after committing a simulated robbery while intoxicated or sober, each of 142 subjects recalled the event within a “cognitive interview”. In an initial exploratory experiment, alcohol consumption reduced the accuracy of recall of a variety of types of information, in particular, information about persons. In the second experiment, person identification suffered following the consumption of alcohol, but only when arousal was low. Higher levels of arousal appeared instead to minimize the negative impact of alcohol upon encoding and recall. Second, whereas the recollections by subjects of what they saw during the crime were not impaired by alcohol consumption, their recollections of what they did were impaired. Both experiments examined the effects of arousal upon the subjects' recalls, and Experiment 2 tested the hypothesis that increased arousal serves to reduce attention to peripheral sources of information. This hypothesis was supported because the identification of persons central to the crime benefited from increased arousal but the identification of persons peripheral to the crime did not. A similar hypothesis about the effects of alcohol received only mixed support because the subjects' behaviors reflected “alcohol myopia” but their identifications of target persons did not. Finally, manipulations at the time of retrieval of the subjects' beliefs about how much alcohol had been consumed also altered accuracy of recall. These experiments were supported by research grants from the Alberta Law Foundation to the first author and from the Social Sciences and Humanities Research Council of Canada to the second author. The authors are indebted to the following people, whose assistance was invaluable: Matthew Davidson, Vanessa Farr, Corinne Kuzma, Eileen McFadzen, Laura Mensch, Debbie Robb, Todd Schultz, and Evelyn Tan. We also thank John Vokey, Brian Cutler, Beth Loftus, Garrett Berman, Marisa Caiola, and an anonymous reviewer who provided critical comments on an earlier version of this paper. This research was presented at the meetings of the American Psychology—Law Society, Williamsburg, March, 1990.     

Traumatic rupture of the basilar artery: report of two cases and review of the literature

Two cases of traumatic rupture of the basilar artery are reported. In the first case, severe basal subarachnoid hemorrhage (SAH) due to a complete transverse tear of the basilar artery was observed in a 53-year-old restrained male driver who was involved in a head-on collision while intoxicated and drowsy. He lost consciousness shortly after the accident and was admitted to hospital in cardiopulmonary arrest. Intensive resuscitative therapies produced cardiac response, but he died 50 minutes after the accident. The ethanol concentration in his blood and urine was 0.35 and 0.55 mg/ml, respectively. In the second case, SAH due to a similar tear of the basilar artery was observed in a 47-year-old man who received several fist blows to the face while intoxicated. He suddenly lost consciousness after the final blow and was admitted to hospital in cardiopulmonary arrest. Intensive resuscitative therapies produced cardiac response, but he died 6 hours after the event. In these cases, the mechanism of the traumatic rupture of the basilar artery is thought to be overstretching due to hyperextension of the head, and intoxication, drowsiness, or both may have interfered with the decedents' ability to protect themselves; thus, the hyperextension of the head may have been rather forceful.     

Significance of changes in the myocardium for the forensic-medical diagnosis of death as a result of alcoholic cardiomyopathy

Significance, of the weight and dimensions of heart as well as of fat dystrophy of cardiomyocytes and of the related detection methods is demonstrated for the diagnosis of alcoholic cardiomyopathy (ACMP). When such patients die in a state of alcoholic intoxication, the diagnosis should be death of acute alcoholic intoxication. Lethality of ACMP can be diagnosed only in those who die in the sober condition or with an insignificant level of alcohol.     

Finding the Balance: Intoxication and Consent

Sexual offences in England and Wales have had a dramatic reimagining in the last 15 years, with the Sexual Offences Act 2003 establishing not only the boundaries of the most heinous of offences such as rape, but also defining one of the most important elements; consent. This article seeks to explore the problems that surround establishing if legally valid consent has been given, with particular regard for cases where voluntary intoxication takes centre stage. The problem that often arises is the question on whether or not an intoxicated victim had the capacity to consent, or establishing if she did consent when memory of the event is hazy, possibly from both parties. Using comparative analysis with other jurisdictions and their take on the offence of rape, the author seeks to discover if the current rules are sufficient to fit within twenty-first century western culture. The victim will be referred to as ‘she’, although the law here and all situations discussed are equally applicable to male rape.

     

Traumatic basal subarachnoid hemorrhage. Report of six cases and review of the literature

Basal subarachnoid hemorrhage due to rupture of normal extra- and intracranial arteries, in association with minor trauma to the face and neck and alcohol intoxication, has been well described but often goes unrecognized at autopsy. This results in the incorrect classification of the manner of death as natural. Six cases of subarachnoid hemorrhage due to mild-to-moderate blows to the head or neck are presented. All were men in the age range 28-61 years (mean, 38.8 years). Four had blood alcohol levels of 0.09-0.28 g % at autopsy, and five of six were comatose or dead within 30 min of the initiating trauma. Traumatic ruptures of otherwise normal extra- and intracranial arteries were identified in four cases. The site of rupture was not found in one case, and the final case had rupture of a fibrotic intracranial vertebral artery. Multiple sites of incomplete and complete rupture were found in four cases. Postmortem angiography was used in one case to demonstrate the site of rupture prior to removal of the brain. Postmortem angiography and careful gross and histologic examination of extra- and intracranial cerebral arteries is recommended in all cases of basal subarachnoid hemorrhage where minor trauma to the head or neck has occurred prior to collapse or death, especially if the decedent was intoxicated at the time of the trauma.     

基于深度卷积神经网络的语音降噪研究

目的为了提高实际工作中获取到的音频资料中语音的质量,降低噪声对语音质量及可懂度的影响,提出了一种基于深度卷积神经网络的语音降噪模型。方法该模型通过卷积、加偏置、批量归一化、Relu激活的多层循环结构,能够有效地对低信噪比条件下语音中的洗衣机噪声、鼓掌噪声、汽车内部噪声等多种常见的环境噪声进行降噪处理。结果最终含噪语音经过模型处理后的MOS评分达到3.91分,其中最高分4.05分,最低分3.81分。结论该模型能够切实提高含噪语音的质量及可懂度,对于实际的公安工作、智慧警务建设、语音分析、语音文本识别等具有重要的意义和价值。