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1.
We studied the allelic frequency distributions and statistical forensic parameters of 21 new short tandem repeat (STR) loci and the amelogenin locus, which are not included in the combined DNA index system (CODIS), in a Russian ethnic minority group from the Inner Mongolia Autonomous Region, China. A total of 114 bloodstain samples from unrelated individuals were extracted and co-amplified with four fluorescence-labeled primers in a multiplex polymerase chain reaction (PCR) system. Using capillary electrophoresis, the PCR products of the 21 STR loci were separated and genotyped. A total of 161 alleles were observed in the Russian ethnic minority group, and corresponding allelic frequencies ranged from 0.0044 to 0.5965. The 21 non-CODIS STR loci of the Russian ethnic minority group were characterized by high genetic diversity and therefore may be useful for elucidating the population’s genetic background, for individual identification, and for paternity testing in forensic practice.  相似文献   

2.
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3.
This study employed an exploratory sequential mixed-methods design to examine the intersection of race and gender among Black American adolescents, aged 11–19. The quantitative component (n = 344) used survey data to examine gender differences in peer-perpetrated and adult-perpetrated racial discrimination experiences, and no gender differences were evident. Qualitative data (n = 42) probed how males and females interpret discrimination experiences given the intersection of race and gender. Although the majority of participants believed that Black males and females have similar experiences, some believed that Black males face more racial discrimination. However, analyses revealed social disadvantages for Black females given that they report inappropriate comments and unwelcome hair touching and limited opportunities for interracial dating compared with Black males.  相似文献   

4.
Both the psychological and criminological fields have long hypothesized the mechanisms that influence desistance from violent offending, but few studies have focused on violent females. This study identifies patterns of violent behavior across 7 years among 172 females and 172 matched males ages 15–24, testing if heterogeneity in violent offending is linked to (a) developmental change in impulse control and (b) attainment of adult milestones. Fewer females persist in violence (25%) than males (46%); 19% of males increase in violent behavior. Females who develop impulse control and are employed are more likely to desist from violence. Violent offending is unrelated to other adult milestones. Developmental increases in impulse control may trigger desistance, while employment may maintain desistance from violence.  相似文献   

5.
Numerous studies have shown that pupils with special needs are at high risk of dropping out and leaving school without finishing their studies, in particular, in postcompulsory schooling. While the great majority of the age group will obtain at least secondary education, the lack of education may serve as a step towards deepening social exclusion. This study presents follow-up results from two programmes working to prevent educational exclusion in Finland. These programmes were selected because they work in association with the comprehensive school system. The results show that the participants' own experiences of the benefits of the models are extremely positive. However, there are statistically significant differences between the post-intervention status of young people from the Creating Your Own Career project and the 10th-form students, and between males and females, when transition to further education and working life is used as the criterion.  相似文献   

6.
ObjectiveResearch investigating the impact of child sexual abuse (CSA) in community samples of adolescents has been limited. This study aims to identify sexual abuse among ethnically diverse high school adolescents of both genders and evaluate their psycho-emotional consequences.MethodThrough the use of self-report instruments, a sample of 223 Latino and European American 16–19-year-old high school students were identified as either victims of CSA or as nonabused. The emotional impact of sexual abuse was also investigated among these ethnically diverse adolescent males and females.ResultsInitial findings revealed that those adolescents who gave inconsistent responses to CSA assessments questions were much more similar in patterns of psychological distress to CSA victims compared to nonabused teenagers. Prevalence analyses revealed that females (45%) were nearly two times more likely to report CSA than males (24%). Latinos (44%) were significantly more likely to experience CSA compared to European Americans (27%), and Latinas (54%) had the highest prevalence overall. Other findings indicated substantial differences in type of perpetrator. While female victims of CSA identified male perpetrators in 91.9% of cases, male victims of CSA identified female perpetrators in 52.9% of cases. Consistent with past research, sexually abused adolescents reported significantly greater psychological distress than their nonabused peers, regardless of gender or ethnic group. Gender differences emerged with females reporting greater psychological symptoms, but these differences were substantially reduced when CSA was controlled. European Americans reported greater anxious arousal symptoms compared to Latinos.ConclusionsOur findings suggest that the prevalence of CSA among adolescents is higher than existing research has noted for both males and females and particularly higher for Latinos compared to European Americans. Perpetration by females upon males may also be higher than research has noted. Our findings also revealed many ethnic and gender similarities and fewer differences in the psychological impact and circumstances of sexual abuse in this diverse sample of adolescents.Practice implicationsThe high prevalence of CSA among adolescent males and particularly Latinas emphasize the need to intervene on a community level and with parents for both prevention and intervention regarding issues of sexual victimization. The numbers of female perpetrators, especially when boys are the targets of abuse, may be higher than previously imagined and thus must be assessed tactfully and thoroughly. This study found that adolescents who reported CSA inconsistently had similar symptoms as those with confirmed CSA and therefore warrant greater attention and more persistent intervention. When treating victims of CSA, the Trauma Symptom Inventory (TSI) is effective in identifying specific areas of emotional distress to treat in sexually abused ethnically diverse male and female adolescents. Culturally relevant prevention efforts are needed for ethnically diverse children of both genders.  相似文献   

7.
Child sexual abuse (CSA) interventions draw from a better understanding of the context of CSA. A survey on violence before age 18 was conducted among respondents aged 13–17 and 18–24 years. Among females (13–17), the key perpetrators of unwanted sexual touching (UST) were friends/classmates (27.0%) and among males, intimate partners (IP) (35.9%). The first incident of UST among females occurred while traveling on foot (33.0%) and among males, in the respondent's home (29.1%). Among females (13–17), the key perpetrators of unwanted attempted sex (UAS) were relatives (28.9%) and among males, friends/classmates (31.0%). Among females, UAS occurred mainly while traveling on foot (42.2%) and among males, in school (40.8%). Among females and males (18–24 years), the main perpetrators of UST were IP (32.1% and 43.9%) and the first incident occurred mainly in school (24.9% and 26.0%), respectively. The main perpetrators of UAS among females and males (18–24 years) were IP (33.3% and 40.6%, respectively). Among females, UAS occurred while traveling on foot (32.7%), and among males, in the respondent's home (38.8%); UAS occurred mostly in the evening (females 60.7%; males 41.4%) or afternoon (females 27.8%; males 37.9%). Among females (18–24 years), the main perpetrators of pressured/forced sex were IP and the first incidents occurred in the perpetrator's home. Prevention interventions need to consider perpetrators and context of CSA to increase their effectiveness. In Kenya, effective CSA prevention interventions that target intimate relationships among young people, the home and school settings are needed.  相似文献   

8.
The tendency for women to prefer older partners, and for men to prefer younger partners, has frequently been explained in terms of socialization to American sex-role norms specifying that men must be older and more powerful than their female partners. However, recent cross-cultural data reveal this same pattern in all societies studied, a finding more in line with an evolutionary life-history model. The evolutionary model assumes that what is attractive to males is not youth, per se, but features related to fertility. This perspective leads to a hypothesis concerning the development of age preferences among adolescents: teenage males should violate the normative pattern shown in adult males and express interest in females older than themselves. 209 teenagers (103 males, 106 females) ranging in age from 12 to 19 were surveyed regarding the age limits they would find acceptable in a dating partner, as well as the age of a dating partner they would find ideally attractive. Although teenage males were willing to date girls slightly younger than themselves, they indicated a much wider range of acceptability above their own ages, and also reported that their ideally attractive partners would be several years older than themselves. Preferences of teenage females were similar in pattern to those of adult females, ranging, on average, from their own age to several years older. When combined with the consistent adult data obtained from numerous cultures, these data suggest the utility of viewing the development of sex differences in mate preference from the perspective of an evolutionary life-history model.  相似文献   

9.
ABSTRACT

Many scholars argue that female students are more motivated than their male counterparts. This study examines evidence from 435 students, 237 males and 198 females, in 19 partially online Introduction to Marketing and Marketing Research classes taught by this researcher at an urban community college. The study spans 10 semesters from fall 2012 to spring 2017. In this retrospective study, female students outperformed male students on the following measures: (a) Students’ final course grades adjusted to remove extra credit grades, (b) Students pre-semester cumulative Grade Point Averages adjusted to remove extra credit grades, and (c) Scores on three early semester extra credit assignments assigned to all students. The data suggest that female students are more likely to be self-regulated learners – more disposed to adopt a proactive disposition to their studies – than male students. But, this study does not include psychometric data. Consequently, the proposition that female students are more self-regulated learners than male students is only a hypothesis that emerges from this analysis. Given that the data are not normally distributed, the analysis was conducted using nonparametric test: Chi-Square and Kruskal–Wallis H.  相似文献   

10.
建立了热脱附-毛细管气相色谱法测定室内环境空气中苯、甲苯、乙酸丁酯、十一烷、乙苯、对二甲苯、间二甲苯、邻二甲苯和苯乙烯等挥发性有机物的检测方法.该方法的色谱分析时间为20 min,比GB 50325-2010方法的52 min缩短了32 min,各物质峰分离程度均高于98%.9种挥发性有机物在一定浓度范围内标准曲线线性良好,相关系数均在0．998~0．999之间,检出限均低于5．0x10-4 mg/m3（采样体积1．0 L计）.实际样品的检测结果表明该方法操作简单、灵敏度高、数据准确可靠,满足分析要求.  相似文献   

11.
Chi‐square analysis is used to test for differences in the degree results of male and female geography graduates from 42 UK universities between 1973 and 1993. The combined results of these universities (i.e. departments at subject‐specific level) show a persistent and striking overrepresentation of males with thirds and pass degrees together with a less obvious, but statistically significant, overrepresentation of males achieving firsts. Corresponding analyses for individual departments emphasise the need for caution in deriving generalisations from aggregate data. A significant difference (at the 99% level) in the cumulative annual degree results of males and females is found in 10 of the 42 departments. The sources of these differences vary and it is suggested that a distinction is drawn between general factors responsible for the pervasive overrepresentation of males in the third/pass categories and department‐specific factors responsible for gender differences in other degree classes, especially firsts.  相似文献   

12.
OBJECTIVE: Children's Advocacy Centers (CACs) aim to improve child forensic interviewing following allegations of child abuse by coordinating multiple investigations, providing child-friendly interviewing locations, and limiting redundant interviewing. This analysis presents one of the first rigorous evaluations of CACs' implementation of these methods. METHODS: This analysis is part of a quasi-experimental study, the Multi-Site Evaluation of Children's Advocacy Centers, which evaluated four CACs relative to within-state non-CAC comparison communities. Case abstractors collected data on investigation methods in 1,069 child sexual abuse cases with forensic interviews by reviewing case records from multiple agencies. RESULTS: CAC cases were more likely than comparison cases to feature police involvement in CPS cases (41% vs. 15%), multidisciplinary team (MDT) interviews (28% vs. 6%), case reviews (56% vs. 7%), joint police/child protective services (CPS) investigations (81% vs. 52%) and video/audiotaping of interviews (52% vs. 17%, all these comparisons p<.001). CACs varied in which coordination methods they used, and some comparison communities also used certain coordination methods more than the CAC with which they were paired. Eighty-five percent of CAC interviews took place in child-friendly CAC facilities, while notable proportions of comparison interviews took place at CPS offices (22%), police facilities (18%), home (16%), or school (19%). Ninety-five percent of children had no more than two forensic interviews, and CAC and comparison differences on number of interviews were mostly non-significant. CONCLUSIONS: Relative to the comparison communities, these CACs appear to have increased coordination on investigations and child forensic interviewing. The CAC setting was the location for the vast majority of CAC child interviews, while comparison communities often used settings that many consider undesirable. CACs showed no advantage on reducing the number of forensic interviews, which was consistently small across the sample.  相似文献   

13.
Male courtship of nonreceptive females and male-male agonistic encounters were monitored daily for eight heterosexual groups of guinea pigs. Typically, one male (the associating male) accounted for much more courtship of a given female during her pregnancy than did any of the other males. Associating males were high ranking animals but were not always the group’s normal alpha male. Nonalpha associating males invariably ranked higher on the day of the female’s litter and postpartum estrus than their modal daily rank during her pregnancy. In 10 of the 18 cases, a nonalpha associating male took over the alpha position on the day of the litter. The courtship of females by associating males was found to differ from that by nonassociating males in that associating males displayed circling, rumping, swaying, and pursuit in a significantly higher percentage of the total number of courtship bouts.  相似文献   

14.
Gender differences in level and pattern of cognitive abilities were examined in 28 LD college-able females (CA 18–25) as compared to 21 LD college-able males (CA 18–25). Both groups were in the average IQ range as measured by the Wechsler Adult Intelligence Scale, with LD males significantly higher on the Full Scale IQ and three out of the four subtests, Picture Completion, Block Design, and Information. The LD females performed significantly better on the Digit Symbol subtest. The hierarchies of subtest performance and Bannatyne and ACID category scores were compared. LD females have strengths in visual-motor abilities and verbal conceptualization, while the LD males’ highest abilities were nonverbal visual-spatial confirming earlier studies on younger LD individuals and non-LD males and females. Performance on the Digit Symbol subtest was the next to the lowest for the males, the highest for females. However, for both groups, short-term and long-term memory for digits and factual knowledge and mental arithmetic problem solving were relative weaknesses. Results indicate different patterns of cognitive abilities in LD females and males which have implications for identification, service, and prognosis for the learning disabled, especially females.  相似文献   

15.
Seven hundred and sixty-eight adolescents from five countries and regions (USA, Spain, Hong Kong, Qatar, and Malaysia), aged 13–19 (M?=?15.78; SD?=?1.28) years, responded to a questionnaire designed to determine who was their most admired famous adult or hero. Male heroes clearly outnumbered admired females (73.3% vs. 26.7%). There was a pattern of same-sex choices, but it was more likely for girls to choose male heroes than for boys to choose females. Over half of the admired adults were athletes, and movie, television, and music stars. Regarding the personally known adults, there was a more balanced choice of males and females, with parents as the most frequent choice. Results suggest that society continues to fail in providing an adequate supply of female role models.  相似文献   

16.
采用电化学沉积将铂纳米颗粒固定到碳纤维微电极上,制备了一种新型铂纳米颗粒修饰微电极.将铂纳米颗粒修饰微电极与毛细管电泳联用,对抗坏血酸进行了检测.探讨了铂的电沉积时间、电位,氯铂酸的浓度,缓冲溶液pH、浓度,检测电势和分离电压等对该电极的影响.实验结果表明,该电极对抗坏血酸的线性范围为1.0×10-6～8.0×10-6 mol/L和8.0×10-6～1.0×10-3 mol/L,相关系数分别为0.998 1和0.999 2,信噪比为3时,检出限为8.0×10-7 mol/L.利用该电极实现了果汁中抗坏血酸的定量检测.  相似文献   

17.
In order to learn more about their reaction to the female sex attractant, 61 male Norway rats were given two-choice preference tests in which they reacted to cues from receptive vs. non-receptive females. In the first experiment, 16 heterosexually experienced males showed a reliable preference (p < .01) for receptive over nonreceptive anesthetized females, as did 15 naive males (p < .02) which later proved to be copulators. Ten naive males which later proved to be noncopulators showed no reliable preference for either type of female. In the second experiment, 15 naive males which later proved to be copulators showed no reliable preference for the odors from receptive vs. nonreceptive females. From these experiments, we conclude that naive males which later prove to be sexually vigorous are attracted to the composite bodily cues from receptive females, and that this attraction is not mediated by olfactory cues alone.  相似文献   

18.
Adult Syrian hamster females (Mesocricetus auratus) learn to discriminate against familiar heterospecific males (Turkish hamster, M. brandti). We investigated whether females learn to avoid any heterospecific male after exposure to just one heterospecific male. We predicted that, after being exposed to one heterospecific male, a female would avoid mating not only with that familiar male but also with any unfamiliar heterospecific male. We exposed females to a heterospecific male across a wire-mesh barrier for 8 days and then paired the female with (a) that same heterospecific male or (b) an unfamiliar heterospecific male. Females exhibited lordosis faster and for a longer duration toward the unfamiliar than toward the familiar heterospecific male. However, females were similarly aggressive toward familiar and unfamiliar heterospecific males. Perhaps exposure to stimuli from several heterospecific males (a likely scenario in the wild) would result in females behaving similarly toward familiar and unfamiliar heterospecific males.  相似文献   

19.
目的:探讨维吾尔族大学生成就动机的特点及与中国汉语水平考试的关系。方法:使用成就动机量表(AMS)对244名维吾尔族大学生进行调查。结果:维吾尔族大学生的成就动机水平在年级和城乡维度上存在显著差异,维吾尔族大学生的成就动机与其中国汉语水平考试相关不显著。结论:低年级维吾尔族大学生的成就动机高于高年级维吾尔族大学生的成就动机;来自农村维吾尔族大学生的成就动机高于来自城市的维吾尔族大学生;维吾尔族大学生的成就动机与中国汉语水平考试关系不大。  相似文献   

20.
This meta-analytic review examines the association between childhood sexual abuse and risky sexual behaviours with sub-group analyses by gender. Systematic searches of electronic databases including MEDLINE, PubMed, EMBASE, and PsycINFO were performed using key terms. We used a priori criteria to include high quality studies and control for heterogeneities across eligible studies. The review was registered with PROSPERO and used the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. The final meta-analysis applied fixed-effects model to generate pooled odds ratio (OR). Subgroup analyses were conducted to identify potential methodological moderators. The meta-analysis included 8 eligible studies (N = 38,989, females = 53.1%). The overall syndemic of risky sexual behaviors at adulthood was 1.59 times more common in childhood sexual abuse victims. There was a similar association between childhood sexual abuse in general and subsequent risky sexual behaviors in both females and males. However, in cases of substantiated childhood sexual abuse, there was a greater odds of risky sexual behaviors in females (OR = 2.72) than males (OR = 1.69). The magnitude of association of childhood sexual abuse and risky sexual behaviors was similar for males and females regardless of study time, study quality score and method of childhood sexual abuse measurement. There were nonsignificant overall and subgroup differences between males and females. Childhood sexual abuse is a significant risk factor for a syndemic of risky sexual behaviors and the magnitude is similar both in females and males. More research is needed to explore possible mechanisms of association.  相似文献   

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