scholarly journals Gender differences in computer-related achievement, anxiety and attitude: A meta-analysis in Turkey sample

2016 ◽  
Vol 6 (1) ◽  
pp. 02 ◽  
Author(s):  
Esad Esgin ◽  
Mehmet Elibol ◽  
Muhammed Daglı
Keyword(s):  
Gender Differences ◽  
Computer Anxiety ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Random Effects Model ◽  
English Studies ◽  
Size Standard ◽  
Related Attitude ◽  
Anxiety Levels ◽  
Achievement Anxiety

The aim of this study is to analyze the gender differences on computer-related achievement, anxiety and attitude in Turkey sample. With an aim to combine the results obtained from the independent studies conducted on computer achievement, computer anxiety and computer-related attitude; three different meta-analysis studies were conducted. Various criteria were used in order to determine which studies were going to be included in meta-analysis. Within this context, both Turkish and English studies conducted during 2000-2014 were analyzed; 16 studies on achievement, 17 studies on anxiety and 30 studies on attitude from Turkey sample containing sample size, standard deviation and average values were included in the research. The studies containing the relevant data were analyzed with random effects model. As result of the study, effect size of gender differences for computer achievement, computer anxiety and computer-related attitude were found as 0.012, 0.237 and 0.114 respectively. The values obtained were evaluated according to the classification made by Thalheimer and Cook [30], it was detected that effect sizes regarding gender differences for computer achievement and computer-related attitude were negligible but effect sizes regarding gender differences for computer anxiety were small in favor of male individuals. Consequently, it was determined that there was no difference in computer achievement and computer-related attitude of male and female individuals and the anxiety levels of females are higher than the anxiety levels of males. Keywords: computer achievement, computer anxiety, computer-related attitude, gender differences, meta-analysis

scholarly journals Effects of Psychological Interventions on the Prevention of Sports Injuries: A Meta-analysis

2020 ◽  
Vol 8 (8) ◽  
pp. 232596712092832
Author(s):  
Shanshan Li ◽  
Qianjin Wu ◽  
Zichao Chen
Keyword(s):  
Sports Injuries ◽  
Meta Analysis ◽  
Significant Risk ◽  
Effect Sizes ◽  
Psychological Interventions ◽  
Random Effects Model ◽  
Level Of Evidence ◽  
Randomized Controlled ◽  
Subgroup Analyses ◽  
Substantial Heterogeneity

Background: Studies have shown that preventive psychological interventions can reduce the occurrence of sports injuries. Purpose: To systematically evaluate the published literature on the effects of psychological interventions on rates of sports injuries and propose a set of psychological interventions to reduce such injuries. Study Design: Systematic review; Level of evidence, 1. Methods: A total of 11 randomized controlled trials and intervention control trials involving 1287 participants were included. A random-effects model was used to analyze the data. Pooled results were expressed as effect sizes and 95% CIs. Bias and heterogeneity among the studies were assessed, and sensitivity and subgroup analyses were performed. Results: Meta-analysis suggested that preventive psychological interventions effectively prevented the occurrence of sports injuries (effect size = –0.55; P < .001), although the studies showed substantial heterogeneity ( I 2 = 94.2%; P < .001), which could not be attributed to specific variables. Nevertheless, sensitivity analysis suggested that overall results were reliable. No significant risk of publication bias was found. Conclusion: Preventive psychological interventions moderately reduced the risk of sports injuries. Risk screening also significantly reduced the risk of sports injuries. These interventions should focus on cognitive behavior and be administered in 1 to 6 sessions over 7 to 12 weeks for 60 minutes per session.

A dose-response and meta-analysis of phytosterols consumption on liver enzymes

2019 ◽  
Vol 50 (3) ◽  
pp. 579-600
Author(s):  
Somayeh Tajik ◽  
Kevan Jacobson ◽  
Sam Talaei ◽  
Hamed Kord-Varkaneh ◽  
Zeinab Noormohammadi ◽  
...  
Keyword(s):  
Liver Function ◽  
Design Methodology ◽  
Liver Enzymes ◽  
Weighted Mean Difference ◽  
Meta Analysis ◽  
Serum Biochemistry ◽  
Effect Sizes ◽  
Random Effects Model ◽  
Weighted Mean ◽  
Content Type

Purpose The results of human studies evaluating the efficacy of plant Phytosterols on liver function were inconsistent. Therefore, the purpose of this paper is to eliminate these controversies about the Phytosterols consumption on liver serum biochemistry in adult subjects. Design/methodology/approach The literatures systematically searched throughout PubMed and Scopus databases up to June 2018; it was conducted by using related keywords. Estimates of effect sizes were expressed based on weighted mean difference (WMD) and 95% CI from the random-effects model (erSimonian and Laird method). Heterogeneity across studies was assessed by using I2 index. Eighteen studies reported the effects of Phytosterols (PS) supplementation on liver serum biochemistry. Findings The current meta-analysis did not show a significant effect on ALT (MD: 0.165 U/L, 95% CI: −1.25, 1.58, p = 0.820), AST (MD: −0.375 IU/Liter, 95% CI: −1.362, 0.612, p = 0.457), ALP (MD: 0.804 cm, 95% CI: −1.757, 3.366, p = 0.538), GGT (MD: 0.431 U/L, 95% CI: −1.803, 2.665, p = 0.706) and LDH (MD: 0.619 U/L, 95% CI: −4.040, 5.277, p = 0.795) following PS consumption. Originality/value The authors found that no protective or toxic effects occur after the consumption of Phytosterols on liver enzymes including ALT, AST, ALP, LDH and GGT.

scholarly journals Nutraceutical supplements in management of pain and disability in osteoarthritis: a systematic review and meta-analysis of randomized clinical trials

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Dawood Aghamohammadi ◽  
Neda Dolatkhah ◽  
Fahimeh Bakhtiari ◽  
Fariba Eslamian ◽  
Maryam Hashemian
Keyword(s):  
Pain Intensity ◽  
Physical Function ◽  
Random Effects ◽  
Effect Size ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Cochrane Library ◽  
Random Effects Model ◽  
Womac Index ◽  
Pain Subscale

AbstractThis study designed to evaluate the effect of nutraceutical supplementation on pain intensity and physical function in patients with knee/hip OA. The MEDLINE, Web of Science, Cochrane Library, Scopus, EMBASE, Google Scholar, Science direct, and ProQuest in addition to SID, Magiran, and Iranmedex were searched up to March 2020. Records (n = 465) were screened via the PICOS criteria: participants were patients with hip or knee OA; intervention was different nutritional supplements; comparator was any comparator; the outcome was pain intensity (Visual analogue scale [VAS]) and physical function (Western Ontario and McMaster Universities Arthritis [WOMAC] index); study type was randomized controlled trials. The random effects model was used to pool the calculated effect sizes. The standardized mean difference (SMD) of the outcome changes was considered as the effect size. The random effects model was used to combine the effect sizes. Heterogeneity between studies was assessed by Cochran's (Q) and I2 statistics. A total of 42 RCTs were involved in the meta-analysis. Nutritional supplementation were found to improve total WOMAC index (SMD = − 0.23, 95% CI − 0.37 to − 0.08), WOMAC pain (SMD = − 0.36, 95% CI − 0.62 to − 0.10) and WOMAC stiffness (SMD = − 0.47, 95% CI − 0.71 to − 0.23) subscales and VAS (SMD = − 0.79, 95% CI − 1.05 to − 0.05). Results of subgroup analysis according to the supplementation duration showed that the pooled effect size in studies with < 10 months, 10–20 months and > 20 months supplementation duration were 0.05, 0.27, and 0.36, respectively for WOMAC total score, 0.14, 0.55 and 0.05, respectively for WOAMC pain subscale, 0.59, 0.47 and 0.41, respectively for WOMAC stiffness subscale, 0.05, 0.57 and 0.53, respectively for WOMAC physical function subscale and 0.65, 0.99 and 0.12, respectively for VAS pain. The result suggested that nutraceutical supplementation of patients with knee/hip OA may lead to an improvement in pain intensity and physical function.

scholarly journals A meta-analysis study on the attitudes of pre-service music teachers towards the teaching profession in Turkey

2021 ◽  
Vol 15 (4) ◽  
pp. 519-526
Author(s):  
Rasim Erol Demirbatır ◽  
Zeynep Özer
Keyword(s):  
High School ◽  
Teacher Candidates ◽  
Music Teachers ◽  
Meta Analysis ◽  
Teaching Profession ◽  
Music Teacher ◽  
Effect Sizes ◽  
Random Effects Model ◽  
Analysis Study ◽  
Service Music

The objective this study was to determine whether music teacher candidates’ attitudes towards the teaching profession in Turkey differ with respect to different variables. In this direction, a meta-analysis study was carried out on the pre-service music teachers’ attitudes towards their profession. The study consists of 12 studies chosen with predetermined criteria. Since the effect sizes of these studies display a heterogeneous structure, the random effects model was conducted. Effect sizes in the random effects model were calculated by using Hedges g coefficient with 12 studies for gender and nine studies for the form of high school graduated. Taking the results of the findings into consideration, it was concluded that the attitudes of female music teacher candidates towards the teaching profession are more positive than male candidates. There is no difference between Fine Arts and other high schools regarding the variable of the form of high school.

scholarly journals Relationship between gestational acrylamide exposure and offspring’s growth: a systematic review and meta-analysis of cohort studies

2020 ◽  
Vol 23 (10) ◽  
pp. 1791-1799
Author(s):  
Yongle Zhan ◽  
Ying Xiao ◽  
Tianjia Guan ◽  
Shuyang Zhang ◽  
Yu Jiang
Keyword(s):  
Systematic Review ◽  
Cohort Studies ◽  
Web Of Science ◽  
Meta Analysis ◽  
Maternal Diet ◽  
Effect Sizes ◽  
Current Evidence ◽  
Random Effects Model ◽  
Exposure Group ◽  
Dietary Strategy

AbstractObjective:To estimate the current evidence regarding the association between gestational acrylamide (AA) exposure and offspring’s growth.Design:Systematic review and meta-analysis.Setting:A systematic literature search for relevant publications was conducted using PubMed, Medline, Embase, Web of Science databases from inception to 26 April 2019. The standardised mean difference (SMD) or OR with 95 % CI was selected as the effect sizes and was calculated using a random effects model.Results:Five cohort studies including 54 728 participants were identified. Offspring’s birth weight was significantly lower in high AA exposure group than in low AA exposure group (SMD –0·05, 95 % CI –0·09, –0·02, P = 0·005). There was also an association between maternal AA exposure and small for gestational age (OR 1·14, 95 % CI 1·06, 1·23, P < 0·001). In addition, pooled ORs suggested that children had a high risk of developing overweight/obesity in the future in maternal high AA exposure group (OR 1·14, 95 % CI 1·08, 1·21, P < 0·001 at age 3; OR 1·13, 95 % CI 1·07, 1·19, P < 0·001 at age 5; OR 1·09, 95 % CI 1·02, 1·16, P = 0·020 at age 8).Conclusions:These findings have important implications for conducting health education, providing guidance on maternal diet and developing an appropriate dietary strategy for pregnant women to reduce dietary AA exposure.

Neuroticism and emotion regulation through music listening: A meta-analysis

2018 ◽  
Vol 24 (3) ◽  
pp. 342-355 ◽  
Author(s):  
Dave Miranda ◽  
Camille Blais-Rochette
Keyword(s):  
Emotion Regulation ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Significant Heterogeneity ◽  
Music Listening ◽  
Random Effects Model ◽  
Emotional Instability ◽  
Summary Effect ◽  
K 13 ◽  
Musical Emotion

Recent research has found that neuroticism (i.e., trait emotional instability) may dispose people to use music listening as a strategy to regulate their emotions. To estimate the magnitude of this relationship, we performed a meta-analysis (random effects model) of the extant 13 correlational studies ( k = 13) for a total of 2641 participants. Results indicated a significant small-to-medium summary effect ( r =.22, 95% CI [0.17, 0.27]) for the positive correlation between neuroticism and emotion regulation through music listening. Furthermore, there was no evidence of significant heterogeneity in effect sizes across studies. Overall, we conclude that the putative effect of neuroticism on musical emotion regulation is relatively moderate. Findings may suggest that people higher in neuroticism are more prone to use music listening as an accessible resource to regulate their negative emotions or manage whatever affects their mood in everyday life.

scholarly journals P-uniform*

2018 ◽  
Author(s):  
Robbie Cornelis Maria van Aert ◽  
Marcel A. L. M. van Assen
Keyword(s):  
Publication Bias ◽  
Random Effects ◽  
Effect Size ◽  
Meta Analysis ◽  
Statistical Properties ◽  
Selection Model ◽  
Effect Sizes ◽  
Random Effects Model ◽  
Average Effect ◽  
Model Approach

Publication bias is a major threat to the validity of a meta-analysis resulting in overestimated effect sizes. P-uniform is a meta-analysis method that corrects estimates for publication bias but overestimates average effect size if heterogeneity in true effect sizes (i.e., between-study variance) is present. We propose an extension and improvement of p-uniform called p-uniform*. P-uniform* improves upon p-uniform in three important ways, as it (i) entails a more efficient estimator, (ii) eliminates the overestimation of effect size in case of between-study variance in true effect sizes, and (iii) enables estimating and testing for the presence of the between-study variance. We compared the statistical properties of p-uniform* with p-uniform, the selection model approach of Hedges (1992), and the random-effects model. Statistical properties of p-uniform* and the selection model approach were comparable and generally outperformed p-uniform and the random-effects model if publication bias was present. We demonstrate that p-uniform* and the selection model approach estimate average effect size and between-study variance rather well with ten or more studies in the meta-analysis when publication bias is not extreme. P-uniform* generally provides more accurate estimates of the between-study variance in meta-analyses containing many studies (e.g., 60 or more) and if publication bias is present. However, both methods do not perform well if the meta-analysis only includes statistically significant studies. P-uniform performed best in this case but only when between-study variance was zero or small. We offer recommendations for applied researchers, and provide an R package and an easy-to-use web application for applying p-uniform*.

Current Methods for Meta-Analysis

2007 ◽  
Vol 215 (2) ◽  
pp. 90-103 ◽  
Author(s):  
Ralf Schulze
Keyword(s):  
Fixed Effects ◽  
Structural Equation ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Equation Modeling ◽  
Random Effects Model ◽  
New Methods ◽  
New Findings ◽  
Multivariate Procedures ◽  
Research Questions

Abstract. The bulk of conceptual and statistical developments as well as applications of meta-analysis have been published in the last 30 years. The methods for meta-analysis continue to be refined and new methods are applied to new types of research questions and data. Such current approaches, issues, and developments prevalent in the behavioral sciences are presented, reviewed, and discussed in this paper. The areas that are covered include: the fixed effects and random effects model of meta-analysis, new findings concerning effect sizes and their statistical properties, the comparison of different meta-analytic approaches, and multivariate procedures for meta-analysis. The latter also covers the stepwise combination of meta-analysis and structural equation modeling (MASEM).

Abstract 15931: Risk of Post Procedural Atrial Fibrillation in Patients Undergoing Transcatheter Aortic Valvular Replacement - A Meta-Analysis

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Waqas Qureshi ◽  
Usama b Nasir ◽  
Elsayed Z Soliman ◽  
Peter M Belford ◽  
Sanjay K Gandhi ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Aortic Valve ◽  
Older Patients ◽  
Web Of Science ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Random Effects Model ◽  
Surgical Aortic Valve Replacement ◽  
Post Procedure ◽  
Valvular Replacement

Introduction: Atrial fibrillation is a common postoperative complication of surgical aortic valve replacement (SAVR). However, it is not known if the incidence of post procedure AF is impacted by performing Transcatheter Aortic Valvular Replacement (TAVR) instead of SAVR. Hypothesis: There is no difference in risk of post procedure incident AF in patients undergoing TAVR vs. SAVR. Methods: We systematically reviewed studies evaluating TAVR vs. SAVR and risk of post procedure AF. We searched MEDLINE, EMBASE, CINAHL, Web of Science, meeting abstracts, presentations and Cochrane central databases from inception through May 2015. For a study to be selected, it had to report the rates of incident AF in individuals undergoing TAVR. Data were extracted by 2 independent authors (WTQ and UBN). Forrest plot was created to show the effect sizes (Figure 1). Results: A total of 8 studies including 2483 patients (mean age 81.4 years, 70.3% male) were analyzed. There were 1293 patients that underwent TAVR and 1190 patients that underwent SAVR. The 1- year incidence of AF was 231 (17.9%) in TAVR group vs. 377 (31.6%) in SAVR group. In a random effects model, patients treated with TAVR had a 48% decreased risk of post procedural 1 year risk of AF [pooled Risk Ratio (95% confidence interval) 0.52 (0.37-0.73), p <0.001]. There was moderate heterogeneity in the results (I2 = 80%). The risk of AF was higher in studies with older patients and was lower in studies with higher proportion of patients that underwent transfemoral TAVR vs. transapical TAVR. Conclusions: In this meta-analysis, the post procedure risk of AF was lower in TAVR group as compared to SAVR group. The risk of post procedure AF should be considered while making decision for TAVR vs. SAVR.

Gender differences in inhibitory control as assessed on simple delay tasks in early childhood: A meta-analysis

2021 ◽  
pp. 016502542110203
Author(s):  
Irwin W. Silverman
Keyword(s):  
Gender Differences ◽  
Gender Difference ◽  
Inhibitory Control ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Parental Socialization ◽  
Female Advantage ◽  
Selection Processes ◽  
Socialization Processes ◽  
The Individual

Bjorklund and Kipp (1996) hypothesized that due to selection processes operative during human evolution, females have an inborn advantage over males in the ability to suppress inappropriate responses on tasks in the behavioral and social domains. To test this hypothesis, a meta-analysis was conducted on gender differences on simple delay tasks in which the participant is required to wait for a “go” signal before making an approach response to an enticing stimulus. The meta-analysis was performed on 113 effect sizes derived from 102 studies of 21,378 children who ranged in age from 1 year to 9 years and who lived in at least 15 countries. As hypothesized, girls exceeded boys in delay ability, with the gender differences being small in magnitude (Hedges’ g = .25–.26). The female advantage in delay ability held for both U.S. and non-U.S. samples of children. Further analyses found that girls outperformed boys on each of four simple delay tasks. Although the magnitude of the gender difference on the individual simple delay tasks did not differ as a function of age, the age ranges covered were narrow. Discussion focuses on two issues: (a) whether gender differences in delay ability can be explained by a factor other than inhibitory control and (b) whether parental socialization processes can explain the gender differences in delay ability. The evidence reviewed does not provide substantial support for either of these possibilities.

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