Small Gender Differences Research Articles

Working Memory and Mathematical Performance: A Correlational Study

This study is intended to examine the correlation between working memory of students and their academic performance in Mathematics. Specifically, it was aimed to determine the degree of relationship between working memory capacity and academic achievement of students in mathematics studying at secondary school. A sample of 800 students studying in grade 10 was randomly selected from forty government and private secondary schools (girls and boys) situated in Hazara division, Khyber Pakhtunkhwa, Pakistan. Both Urdu and English mediums of instruction schools were included in the sample. The researcher used digits span backwards test (DSBT) to find out the working memory capacity of the students associated with their academic performance in mathematics. This study revealed that girls have outperformed boys very markedly in examination scores of mathematics at secondary level. Contrarily, boys have performed well in working memory capacity than girls at the secondary level. However a very small gender difference is observed in this study. It is also noticed that private secondary schools showed higher performance in examination scores of mathematics and in working memory capacity than government secondary schoolsl.

Gender Differences and the Relationship of Motor, Cognitive and Academic Achievement in Omani Primary School-Aged Children.

Until now, there has been no integrated study of the cognitive, motor and academic developments in children in the Arab world. In this study we investigated gender differences in those three areas in primary school-aged children in Oman and as well as the inter-relations between those three aspects of development. Ninety-five third graders completed four working memory tests, a mental rotation test and a motor test. Furthermore, the marks in math, science and Arabic language were registered. The result showed that there were small gender differences: Girls performed better in one of the working memory tests and boys in the coordination motor test. The study also showed that there were significant correlations between cognitive variables and academic performance, as well as two significant correlations between motor performance and marks in math and science. Marks in math correlated with the performances in the 20 m run and the coordination test, whereas the marks in science correlated with the ball-leg-wall test, the coordination test, and the endurance test. Regression analysis showed that all marks were predicted by the working memory and mental rotation performance as well as the motor ability. This means that academic achievement in Oman could be predicted by basic cognitive as well as motor abilities.

Gender Difference in Verbal Performance: a Meta-analysis of United States State Performance Assessments

A comprehensive, statistical review of gender differences in verbal performance has not been conducted in several decades and the majority of previous work on this topic used published studies that often include small, non-representative samples. The introduction of national legislation in US public schools required schools to assess and publicly report verbal performance, thus providing verbal assessment data for millions of American students. The current study presents a meta-analysis of gender differences in US state verbal assessments. Data were collected from the departments of education in 16 states representing more than 10 million US students in grades 3 through 11. Results indicated a small gender difference favoring females for overall verbal performance (d = 0.29). However, when type of assessment was considered, the female advantages in reading (d = 0.19) and language arts (d = 0.29) were smaller than in writing performance (d = 0.45). The small gender differences in verbal performance increased in a linear pattern from grades 3 to 8 and then remained steady in high school.

Who’s on Top? Gender Differences in Risk-Taking Produce Unequal Outcomes for High-Ability Women and Men

Research shows that men are more likely to take risks than women, but there is scant evidence that this produces gender inequality. To address this gap, I analyzed engineering exam scores that used an unusual grading procedure. I found small average gender differences in risk-taking that did not produce gendered outcomes for students of average or poor ability. But the gender gap in risk-taking among the most competent students reduced the odds that high-ability women received top exam scores. These results demonstrate that gender differences in risk-taking can produce gender inequality in outcomes among top performers. This suggests that the upward mobility of high-ability women may be depressed relative to equally competent men in male-typed institutional settings in which outcomes are influenced by both ability and risk-taking. In this manner, these results provide new insights into the microlevel social-psychological processes that produce and reproduce gender inequality.

Immunolocalization of natriuretic peptides and their receptors in goat (Capra hircus) heart

Natriuretic peptides are structurally similar, but genetically distinct, hormones that participate in cardiovascular homeostasis by regulating blood and extracellular fluid volume and blood pressure. We investigated the distribution of natriuretic peptides and their receptors in goat (Capra hircus) heart tissue using the peroxidase-anti-peroxidase (PAP) immunohistochemical method. Strong staining of atrial natriuretic peptide (ANP) was observed in atrial cardiomyocytes, while strong staining for brain natriuretic peptide (BNP) was observed in ventricular cardiomyocytes. Slightly stronger cytoplasmic C-type natriuretic peptide (CNP) immunostaining was detected in the ventricles compared to the atria. Natriuretic peptide receptor-A (NPR-A) immunoreactivity was more prominent in the atria, while natriuretic peptide receptor-B (NPR-B) immunoreactivity was stronger in the ventricles. Cytoplasmic natriuretic peptide receptor-C (NPR-C) immunoreactivity was observed in both the atria and ventricles, although staining was more prominent in the ventricles. ANP immunoreactivity ranged from weak to strong in endothelial and vascular smooth muscle cells. Endothelial cells exhibited moderate to strong BNP immunoreactivity, while vascular smooth cells displayed weak to strong staining. Endothelial cells exhibited weak to strong cytoplasmic CNP immunoreactivity. Vascular smooth muscle cells were labeled moderately to strongly for CNP. Weak to strong cytoplasmic NPR-A immunoreactivity was found in the endothelial cells and vascular smooth muscle cells stained weakly to moderately for NPR-A. Endothelial and vascular smooth cells exhibited weak to strong cytoplasmic NPR-B immunoreactivity. Moderate to strong NPR-C immunoreactivity was observed in the endothelial and smooth muscle cells. Small gender differences in the immunohistochemical distribution of natriuretic peptides and receptors were observed. Our findings suggest that endothelial cells, vascular smooth cells and cardiomyocytes express both natriuretic peptides and their receptors.

No sex difference in an everyday multitasking paradigm

According to popular beliefs and anecdotes, females best males when handling multiple tasks at the same time. However, there is relatively little empirical evidence as to whether there truly is a sex difference in multitasking and the few available studies yield inconsistent findings. We present data from a paradigm that was specifically designed to test multitasking abilities in an everyday scenario, the computerized meeting preparation task (CMPT), which requires participants to prepare a room for a meeting and handling various tasks and distractors in the process. Eighty-two males and 66 females with a wide age range (18–60 years) and a wide educational background completed the CMPT. Results revealed that none of the multitasking measures (accuracy, total time, total distance covered by the avatar, a prospective memory score, and a distractor management score) showed any sex differences. All effect sizes were d ≤ 0.18 and thus not even considered “small” by conventional standards. The findings are in line with other studies that found no or only small gender differences in everyday multitasking abilities. However, there is still too little data available to conclude if, and in which multitasking paradigms, gender differences arise.

Is There a Gender Difference in Cyber-Victimization?

Abstract. The study provides a quantitative synthesis of the literature on gender difference in cyber-victimization (CV). A total of 40 usable research articles were identified and used in this meta-analysis. With some articles having multiple effect sizes, a total of 150 effect sizes for gender difference in CV were obtained. Results indicated a small gender difference, with females experiencing slightly more CV than their male counterparts. However, there were considerable inconsistencies across the studies. Follow-up analyses on the study features revealed that several factors, such as response time frame and region of sampling, significantly moderated the relationship between gender and CV. Exploratory in nature, this study discusses the implications of the findings in reference to existing theories, and suggests future research directions.

Gender differences in mathematics achievement in Beijing: A meta-analysis.

The topic of gender differences in mathematical performance has received considerable attention in the fields of education, sociology, economics and psychology. We analysed gender differences based on data from the Beijing Assessment of Educational Quality in China. A large data set of Grade 5 and Grade 8 students who took the mathematical test from 2008 to 2013 (n=73,318) were analysed. Meta-analysis was used in this research. The findings were as follows. (1) No gender differences in mathematical achievement exist among students in Grade 5, relatively small gender differences exist in Grade 8, females scored higher than males, and variance of male students is larger than that of females in both Grade 5 and Grade 8. (2) Except for statistics and probability, gender differences in other domains in Grade 8 are significantly higher than those in Grade 5, and female students outperform males. (3) The ratio of students of both gender in Grade 5 and Grade 8 at the 95-100% percentile level shows no significant differences. However, the ratio of male students is significantly higher than that of females at the 0-5% percentile level. (4) In Grade 5, the extent to which females outperformed males in low SES group is larger than that in higher SES groups, and in Grade 8, the magnitude of gender differences in urban schools is smaller than that in rural schools. There is a small gender difference among the 8th graders, with the male disadvantage at the bottom of the distribution. And gender differences also vary across school locations.

Gender differences in first self-perceived signs and symptoms in patients with an at-risk mental state and first-episode psychosis.

Gender differences in the current symptomatology of patients with psychotic disorders have previously been described in the literature. However, it has not yet been investigated whether gender differences exist in the very first self-perceived signs or symptoms of illness onset. The aim of this study was to investigate this aspect in at-risk mental state (ARMS) and first-episode psychosis (FEP) patients. ARMS and FEP were recruited via the early detection of psychosis (FePsy) clinic Basel, Switzerland. The Basel Interview for Psychosis (BIP) was used to retrospectively assess the first 3 self-perceived signs and symptoms at illness onset. Differences between gender and patient groups on single item and symptom cluster levels were analysed using logistic regression models. One-hundred-thirty six ARMS (91 men, 45 women) and 89 FEP patients (63 men, 26 women) could be recruited for this study. On a single item level, women more frequently reported "unusual anxiety, fears" and men (at a trend level) "social withdrawal" as being among their 3 first self-perceived symptoms, independent of diagnostic group. On the symptom cluster level, women more frequently reported "increased worrying/anxiety" and (sub-threshold) "hallucinations", independent of diagnostic group. Problems with "thinking, concentration" were reported more frequently by men in the ARMS group only. Our results suggest that only few and relatively small gender differences exist in the first self-perceived signs and symptoms. While men initially mainly notice negative/cognitive symptoms, women first notice (sub-threshold) positive and affective symptoms.

Do Girls Make Boys Study? Gender Composition, Gender Role Culture, and Sense of Futility in Flemish Secondary Schools

This study examines whether the gender difference in sense of academic futility is related to the proportion of girls attending a school. We argue that the more progressive gender role culture in schools with a higher proportion of girls might influence especially boys’ sense of futility. Multilevel analyses of data gathered in 2014 from 5,162 second-grade students in 57 secondary schools in Flanders confirm a small but significant gender difference in sense of futility. The more girls at school, the less feelings of futility boys manifest. This impact can be explained by boys’ traditional gender role attitudes. For girls, the impact of gender composition, higher feelings of futility in schools with more girls, is buffered by girls’ progressive gender role attitudes. In schools with more girls, boys display lower levels of futility than girls. Finally, this impact of gender composition can be ascribed to the students’ educational track.

Gender disparities in child development in the east Asia-Pacific region: a cross-sectional, population-based, multicountry observational study

Gender differences in child development have been extensively studied in high-income countries, but few data are available from low-income and middle-income countries. Our objective was to assess gender disparities in child development that might arise from differential investment in child health, nutrition, and education in six countries across the east Asia-Pacific region. In this cross-sectional, population-based study we quantified the magnitude of gender differences in child development using the East Asia-Pacific Early Child Development Scales (EAP-ECDS) in six countries (Cambodia, China, Mongolia, Papua New Guinea, Timor-Leste, and Vanuatu). We used stratified random sampling (according to age, residence [urban vs rural], and sex) in all countries to recruit eligible children aged 3-5 years from non-ethnic minority populations with no identified or suspected special educational needs for whom EAP-ECDS scores for five or more of seven domains and urban-rural residence information were available. Gender differences in development associated with four national indicators of gender equality (sex ratio at birth, Gender Development Index, Gender Inequality Index, and Gender Parity Index for primary school enrolment) were also examined. We used generalised estimating equation regression to study moderation of differences by family socioeconomic status and wealth, and structural equation models with maximum likelihood to test mediation through health, nutrition, and education. Between June 1, 2013, and Dec 13, 2013, 7582 eligible children were included from Cambodia (n=1189), China (n=1618), Mongolia (n=1230), Papua New Guinea (n=1639), Timor-Leste (n=1176), and Vanuatu (n=730). Girls had significantly higher development scores than boys in Cambodia (difference in composite score: β=1·87 points, 95% CI 0·29 to 3·45; p=0·747), China (2·66 points, 1·20 to 4·13; p=0·0004), Vanuatu (3·10 points, 1·65 to 4·55; p<0·0001), and Mongolia (3·94 points, 2·67 to 5·21; p<0·0001), but not Papua New Guinea (-0·43 points, -1·19 to 0·33; p=0·272) or Timor-Leste (0·09 points, -0·96 to 1·14; p=0·861). Differences in favour of girls were the largest for language skills in Mongolia (5·30 points, 95% CI 4·45 to 6·15); differences in language skills were smallest in the two poorest countries, Timor-Leste (-0·07 points, -1·03 to 0·88) and Papua New Guinea (0·05 points, -1·02 to 1·12). Greater differences in composite scores for girls compared with boys-in favour of girls-were associated with higher national Gender Development Index values (R2=0·790). In Mongolia, smaller gender differences in development were associated with increased household wealth (6·07 points [95% CI 3·22 to 8·92] in the lowest wealth quartile vs 2·27 points [1·38 to 3·15] in the highest wealth quartile), whereas in Timor-Leste, girls only outperformed boys when living in households with higher socioeconomic status (2·87 points [0·27 to 5·47] in the highest wealth quartile and 3·74 points [2·17 to 5·31] in the highest quartile of parental socioeconomic status). Mediating pathways explained up to 37% (in Vanuatu) of the association between gender and development, controlling for family socioeconomic status. Girls aged 3-5 years generally outperformed boys on tests of development, and increasing levels of gender equality across six countries in the east Asia-Pacific region were associated with improved performance of young girls relative to boys. Greater opportunities for economic development are anticipated to result from improvements in gender equality and in the development of girls. Further study is warranted to understand family-level processes and societal norms that lead to gender differences in child development in the early years. UNICEF, the Asia-Pacific Regional Network for Early Childhood, and the Open Society Foundations.

Multi-platform mediation: U.S. mothers’ and fathers’ mediation of teens’ media use

This study attempts to solidify a predictive model of parental mediation across four media platforms (television, video games, internet, and cellphones). The analysis compares U.S. mothers’ and fathers’ mediation, specifically within the larger context of parenting behaviors and media attitudes. Results indicate that there are only a few, small gender differences in parental mediation. Across media, parental mediation was largely predicted by the child’s age, parents’ attitudes about media effects, and levels of parent–child involvement and communication. More involved parents were more frequent mediators for television, video games, and the Internet. Parents who reported frequent talks with children more frequently mediated all four media. The results are discussed within the context of research on parenting.

Optimism and pessimism in the general population: Psychometric properties of the Life Orientation Test (LOT-R)

Background/Objective: The Life Orientation Test-Revised (LOT-R) is often used to assess dispositional optimism. The aims of this study were to test psychometric properties of the LOT-R, to provide normative scores, and to test the association between optimism and several psychological, sociodemographic, and behavioral factors. Method: A randomly selected German general population community sample with an age range of 18-80 years (N=9,711) was surveyed. Results: The Confirmatory Factor Analysis (CFA) proved two (correlated) factors: Optimism and Pessimism. Invariance tests across gender and age groups confirmed metric invariance. There were only small gender differences in the LOT-R total score (M=16.4 for females and M=16.1 for males). The correlation between the subscales Optimism and Pessimism was strong for young and well educated people. Low optimism mean scores were observed for unemployed people, people with low income, smokers, and obese people. Normative scores of the LOT-R are provided. Conclusions: The study confirmed the bidimensional structure of the LOT-R and invariance across age and gender. We can recommend using this instrument for measuring dispositional optimism and pessimism in epidemiological research and clinical practice.

Trends in Age at Marriage and the Onset of Fertility Transition in sub‐Saharan Africa

In this chapter the author adopts a comparative approach to examining longterm trends in female age at marriage and fertility in sub-Saharan Africa with a focus on continental countries having at least 1 million inhabitants. The author’s database on nuptiality includes over 360 censuses and national surveys conducted in these 39 countries since the 1960s. The author analyzes the association between changes in age at first union and the onset of fertility transition examining whether there is a typical pattern of association followed by most countries in the region.

Three-Dimensional Evaluation of the Upper Airway in Children of Skeletal Class III.

The present study was aimed to investigate the relationship of the upper airway size and craniofacial structures in 3 dimensions in growing children of skeletal Class III. Forty-seven children (19 boys and 28 girls, 9.6 ± 1.3 years of age, range 8.0-12.4 years) were selected. Twenty-three children with normal vertical development were divided into groups of insufficient maxilla and overdeveloped mandible for the airway comparison between different sagittal skeletal patterns. Thirty-two children with the same sagittal development were divided into groups of low angle, normal angle, and high angle for the comparison between different vertical skeletal developments. The upper airway and craniofacial structures were measured in cone beam computed tomography images using DOLPHIN 11.7 software. Mann-Whitney U test and Kruskal-Wallis test were used to analyze the airway differences between groups. Spearman correlated analysis was done between the upper airway size and the craniofacial pattern in the transverse dimension. The results showed that the nasopharynx was the only affected airway part between groups of insufficient maxilla and overdeveloped mandible (P <0.05). The high angle group showed smaller upper airway compared with the groups of normal angle and low angle (P <0.05). The skeletal transverse dimension was correlated with the height of velopharynx, hypopharynx, and total airway with small gender differences.

The relationship between work and family preferences and behaviors

Proposed theories to explain gender inequality in the labor market and family, such as gender specialization within families and gender segregation in the labor markets, lack consideration for individual preferences. Preference theory accounts for individual choice and gendered preferences but has been substantially criticized, indicating a need for further research. This study uses Swedish longitudinal data to explore how preferences for work and family relate to behavior. We explore three critical issues raised in previous research: gender differences in preferences; the relationship between work and family changes and subsequent preferences; how preferences relate to work and family behaviors. Our results showed small general gender differences in preferences, although women had a stronger preference for both children and work than men. Changes in work status were further related to changes in work preferences, while changes in family status were related to changes in family preferences. Moreover, preferences had poor predictive power in relation to work and family behaviors. Our results indicate that preferences do not explain gender inequality in Sweden. The relationship between preferences and behaviors seems bidirectional and preferences and behavior within the family sphere has little to do with preferences and behavior within the work sphere.

Individual differences in self-adjustment of hearing aid amplification

Listening in noisy environments remains a common complaint among hearing aid users. Self-adjustment of amplification parameters could improve listener satisfaction in noise. Previous data (Nelson et al., AAS 2015) indicated considerable variability among hearing-impaired listeners when self-adjusting amplification in noisy environments, but the sources of variability are not understood. Data will be presented from 30 adult listeners with mild to moderate hearing loss who self-adjusted amplification parameters in laboratory-simulated restaurant environments. Participants listened using a real-time simulation of a multichannel compression hearing aid and adjusted gain/compression parameters via a simple user interface (EarMachine). On average, listeners selected less gain relative to NAL-NL2 targets, and they reduced gain as noise levels increased. Hearing loss did not predict variation in self-selected amplification. Small but significant gender differences were observed. Female subjects selected more high-frequency gain (2000–8000 Hz) but less low-frequency gain than male subjects. Listeners with prior hearing-aid experience selected more high-frequency gain than listeners with no hearing-aid experience. Younger age was associated with selecting more low-frequency gain. Within-group variability was large compared to mean differences between groups and only a small proportion of variance was explained. These data suggest that self-adjustment of amplification was not easily predicted by listener-specific factors.

Determination of Femoral Neck Angle and Torsion Angle Utilizing a Novel Three-Dimensional Modeling and Analytical Technology Based on CT Datasets.

IntroductionExact knowledge of femoral neck inclination and torsion angles is important in recognizing, understanding and treating pathologic conditions in the hip joint. However, published results vary widely between different studies, which indicates that there are persistent difficulties in carrying out exact measurements.MethodsA three dimensional modeling and analytical technology was used for the analysis of 1070 CT datasets of skeletally mature femurs. Individual femoral neck angles and torsion angles were precisely computed, in order to establish whether gender, age, body mass index and ethnicity influence femoral neck angles and torsion angles.ResultsThe median femoral neck angle was 122.2° (range 100.1–146.2°, IQR 117.9–125.6°). There are significant gender (female 123.0° vs. male 121.5°; p = 0.007) and ethnic (Asian 123.2° vs. Caucasian 121.9°; p = 0.0009) differences. The median femoral torsion angle was 14.2° (-23.6–48.7°, IQR 7.4–20.4°). There are significant gender differences (female 16.4° vs. male 12.1°; p = 0.0001). Femoral retroversion was found in 7.8% of the subjects.ConclusionPrecise femoral neck and torsion angles were obtained in over one thousand cases. Systematic deviations in measurement due to human error were eliminated by using automated high accuracy morphometric analysis. Small but significant gender and ethnic differences were found in femoral neck and torsion angles.

Psychiatric comorbidity in women and men with eating disorders results from a large clinical database

Psychiatric comorbidity is common in patients with eating disorders (ED), but prevalence estimates are heterogeneous, probably due to methodological differences between studies (population, diagnostic method, sampling procedure etc.) and a few studies include men. The aim of this study is to investigate psychiatric DSM-IV Axis I comorbidity in a large sample of adult patients, both males and females, with the whole spectrum of DSM-IV ED diagnoses. Initial presentation assessment data on 11,588 adult men and women presenting to specialist ED clinics in Sweden between 2008 and 2012 were extracted from a large clinical database. Diagnostics were based on semi-structured interviews (SCID-I) and the Structured Eating Disorder Interview (SEDI). Seventy-one percent of the patients with ED had at least one other Axis I disorder. The most common type of diagnosis was anxiety disorders (53%), where generalized anxiety disorder was the most common diagnosis. The highest levels of comorbidity were found for women with Binge Eating Disorder (BED) and men with Bulimia Nervosa (BN). Findings are consistent with previous research showing a high prevalence of psychiatric comorbidity in both men and women with ED. The small gender differences observed seem negligible compared to the general similarity in comorbidity.

An Examination of Gender Differences in the American Fisheries Society Peer‐Review Process

This study investigated the possibility of gender differences in outcomes throughout the peer review process of American Fisheries Society (AFS) journals. For each manuscript submitted to four AFS journals between January 2003 and December 2010, we collated information regarding the gender and nationality of authors, gender of associate editor, gender of reviewers, reviewer recommendations, associate editor's decision, and publication status of the manuscript. We used hierarchical linear modeling to test for differences in manuscript decision outcomes associated with author, reviewer, and associate editor gender. Gender differences were present at some but not every stage of the review process and were not equal among the four journals. Although there was a small gender difference in decision outcomes, we found no evidence of bias in editors’ and reviewers’ recommendations. Our results support the conclusion that the current single‐blind review system does not result in bias against female authors within AFS journals.