moderator variables
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Plant Disease ◽  
2022 ◽  
Author(s):  
Travis R. Faske ◽  
Yuba Raj Kandel ◽  
Tom Allen ◽  
Zane Grabau ◽  
Jiahuai Hu ◽  
...  

Meta-analysis was used to compare yield protection and nematode suppression provided by two, seed- and two, soil-applied nematicides against Meloidogyne incognita and Rotylenchulus reniformis on cotton across three years and several trial locations in the United States Cotton Belt. Nematicides consisted of thiodicarb- and fluopyram-treated seed, aldicarb and fluopyram applied in-furrow and combinations of the seed treatments and soil-applied fluopyram. The nematicides had no effect on nematode reproduction or root infection but had a significant impact on seed cotton yield response (¯D) with an average increase of 176 and 197 kg/ha relative to the nontreated control in M. incognita and R. reniformis infested fields, respectively. However, because of significant variation in yield protection and nematode suppression by nematicides, five or six moderator variables [cultivar resistance (M. incognita only), nematode infestation level, nematicide treatment, application method, trial location, and growing season] were used depending on nematode species. In M. incognita infested fields, greater yield protection was observed with nematicides applied in-furrow and seed-applied + in-furrow than solo seed-applied nematicide applications. Most notably of these in-furrow nematicides were aldicarb and fluopyram (>131 g/ha) with or without a seed-applied nematicide compared to thiodicarb. In R. reniformis infested fields, moderator variables provided no further explanation of the variation in yield response by nematicides. Furthermore, moderator variables provided little explanation of the variation in nematode suppression by nematicides in M. incognita and R. reniformis infested fields. The limited explanation by the moderator variables on the field efficacy of nematicides in M. incognita and R. reniformis infested fields demonstrates the difficulty of managing these pathogens with nonfumigant nematicides across the U. S. Cotton Belt.


2021 ◽  
Vol 10 ◽  
pp. 114-129
Author(s):  
Udayan Karnatak ◽  
Chirag Malik

The effect of analyst presence on underpricing has shown a contrasting result. By synthesizing the result using meta-analysis for twelve studies with more than 20400 firms we found conclusive evidence of the relation between analyst presence and underpricing of IPOs. With the increase in analyst presence by 1% the IPO underpricing increases by 4.9%. Moreover, meta-regression between effect size and moderator variables found the significant and positive role of the reputed underwriter to increase underpricing when the IPO has coverage of analysts. Our results are striking for the US market IPOs in which reputed underwriters as moderator affect underpricing significantly and positively which shows reputation increase information asymmetry. Whereas in emerging markets IPOs reputed underwriters increase market efficiency and information symmetry.


Author(s):  
Akintunde Oluseyi Dada ◽  
Owoade Philip Adeleke ◽  
Samson Akinwumi Aderibigbe ◽  
Michael Adeife Adefemi ◽  
Martina Ayibeya Apie ◽  
...  

Inattention is one of the significant problems that inhibit learning among children with intellectual disabilities. However, several strategies and therapies have been developed to solve the problem. This study, therefore, investigates the effectiveness of music therapy in enhancing attention among children with intellectual disability. A pretest-posttest control experimental research design was adopted. The experiment was carried out for six weeks using Music Therapy Treatment Package on 24 children with intellectual disability that were randomly selected Modupe Cole Momerial Childcare and Treatment Home/School, Akoka, Yaba, Lagos. A validated Attention Observation Rating Scale (AORS) with a reliability coefficient of 0.88 was used for this study. Three hypotheses were tested in the study, and Analysis of Covariance (ANCOVA) was used for data analysis. This study revealed that music therapy is effective in enhancing attention among children with intellectual disabilities. Sex and level of severity of the disability were also tested as moderator variables, but they have no significant main or interaction effect with music therapy in enhancing attention for children with intellectual disability. The finding is that music therapy is significantly effective in enhancing attention for children with intellectual disability regardless of their sex or level of severity. It was concluded that attention deficit could be improved for children with intellectual disability. Therefore, Music therapy was recommended for use in the school with adequate teacher training.


2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Hafize Er Turkuresin ◽  

The objective of this study was to determine the effect of Geographic Information Systems, one of the educational technologies, on the academic performance of students. In accordance with this purpose, to combine the results of independent experimental studies, the meta-analysis method was put into use. Within this context, as a result of the literature review, in the meta-analysis, 17 experimental studies conducted between the years 2007 and 2020 were included. The total sample size of the mentioned studies was 620 in the experimental group and 607 in the control group. Thalheimer and Cook's (2002) classification was used in calculating the effect size values in the study in which the random effects model was used. Publication bias in research; Funnel Plot was tested with Rosenthal Fail Safe N value, cut and fill method of Duval and Tweedie and Begg-Mazumdar statistics, and studies included in meta-analysis were found to be heterogeneous. The effect of moderator variables, which are thought to influence academic achievement, was examined. Q and p significance tests were used to calculate the effect of moderator variables. According to the results of the study, it has been determined that GIS has a very wide (+1,193) effect on academic achievement. Positive average effect size indicates a change in favour of the experimental group. It was concluded that among the moderator variables, the study type, class level and sample size did not create a significant change in the effect size, and the year variable created a significant difference in the effect size.


2021 ◽  
Vol 3 ◽  
Author(s):  
Atle Hole Saeterbakken ◽  
Vidar Andersen ◽  
David George Behm ◽  
Kristoffer Toldnes Cumming ◽  
Olaf Prieske ◽  
...  

The trunk (core) muscles are involved in daily functions (i. e., stabilizing the body in everyday tasks) and force generation of the limbs during athletic tasks such as kicking, throwing, or running. Even though trunk training is a popular means for improving physical fitness and athletic performance, the direct relationship of improved trunk function (i.e., stability, strength, or endurance), fitness and sport-specific performance is not conclusive. The aim of this proposed review is to evaluate the effects of trunk training on physical fitness and sport-specific performance, and to examine potential subject-related (e.g., age, sex) and trunk training-related moderator variables (e.g., training period, training frequency) for performance changes. We will conduct a systematic literature search in Web of Science, MEDLINE (via EBSCO) and SportDiscus. Relevant papers will be screened independently by two reviewers in two stages: (1) title and abstracts and (2) the full text of the remaining papers. A third reviewer will resolve possible disagreements. Data extraction and risk of bias of the included studies will be performed in addition to the PEDro scoring to judge the quality of the studies. A meta-analysis will be conducted to determine the efficacy of trunk training to increase physical fitness and sport-specific performance measures. In addition, subgroup univariate analyses were computed for subject-related (i.e., age, sex, performance level) and training-related moderator variables (i.e., training period, training frequency, training sessions, session duration). The results of this proposed systematic review and meta-analysis will assess the effects of trunk training on physical fitness and sport-specific and identify which subject-related and training-related moderate variables of trunk training modality might be beneficial for performance gains. This knowledge has potential importance for athletes and coaches in sports.


2021 ◽  
Author(s):  
Hafize Er Turkuresin

The objective of this study was to determine the effect of Geographic Information Systems, one of the educational technologies, on the academic performance of students. In accordance with this purpose, to combine the results of independent experimental studies, the meta-analysis method was put into use. Within this context, as a result of the literature review, in the meta-analysis, 17 experimental studies conducted between the years 2007 and 2020 were included. The total sample size of the mentioned studies was 620 in the experimental group and 607 in the control group. Thalheimer and Cook's (2002) classification was used in calculating the effect size values in the study in which the random effects model was used. Publication bias in research; Funnel Plot was tested with Rosenthal Fail Safe N value, cut and fill method of Duval and Tweedie and Begg-Mazumdar statistics, and studies included in meta-analysis were found to be heterogeneous. The effect of moderator variables, which are thought to influence academic achievement, was examined. Q and p significance tests were used to calculate the effect of moderator variables. According to the results of the study, it has been determined that GIS has a very wide (+1,193) effect on academic achievement. Positive average effect size indicates a change in favour of the experimental group. It was concluded that among the moderator variables, the study type, class level and sample size did not create a significant change in the effect size, and the year variable created a significant difference in the effect size.


2021 ◽  
Author(s):  
Yahha Rafique

Test-Driven Development (TDD) is one of the cornerstone practices of the Extreme Programming agile methodology. Today, despite the large scale adoption of TDD in industry, including large software firms such as Microsoft and IBM, its usefulness with regard to the quality and productivity constructs it still under question. Empirical Research has failed to produce conclusive results; all possible results have been reported for both constructs. This research adopts non-empirical measures to gain a deeper understanding of TDD. A two-phased approach has been undertaken towards the goal. The first phase involves conducting a meta-analysis of past empirical research. The meta-analysis quantitatively combines the results of individual empirical studies and identifies moderator variables that could potentially govern the performance of TDD. The second phase of the approach involves the construction of a simulation model of a TDD-based development process. The presented model further analyzes the impact of changes in moderator variables.


2021 ◽  
Author(s):  
Yahha Rafique

Test-Driven Development (TDD) is one of the cornerstone practices of the Extreme Programming agile methodology. Today, despite the large scale adoption of TDD in industry, including large software firms such as Microsoft and IBM, its usefulness with regard to the quality and productivity constructs it still under question. Empirical Research has failed to produce conclusive results; all possible results have been reported for both constructs. This research adopts non-empirical measures to gain a deeper understanding of TDD. A two-phased approach has been undertaken towards the goal. The first phase involves conducting a meta-analysis of past empirical research. The meta-analysis quantitatively combines the results of individual empirical studies and identifies moderator variables that could potentially govern the performance of TDD. The second phase of the approach involves the construction of a simulation model of a TDD-based development process. The presented model further analyzes the impact of changes in moderator variables.


Author(s):  
Rosmini Ismail Et.al

Numerous studies have foundthatfinancial literacy may assist in averting irresponsible spending that linked to materialistic values. However, the area of knowledge that delivers financial literacy varies among studies. The study determines whether credit hours of financial courses,namely, economics, finance and accounting, affect materialism. Consequently, three moderator variables namely gender, year of study and financial sponsorship, were added into the analysis. A survey was conducted on 1022 business undergraduates in Universiti Pendidikan Sultan Idris using money attitude scales as a proxy to measure materialism. Findings indicate that there werenodirectcorrelations between credithoursof financial courses cumulatively or individually, with materialism scores. However, when the year of studyvariable,specifically fourth-year students category, wasinserted as a moderating effect, all three financial courses credit hours were found to be negatively correlatedwith materialism score. The findings demonstrate that accounting courses credit hours affect all materialism dimensions. Meanwhile, three and two materialism dimensions negatively correlated with economic and finance courses, respectively. It indicates that final year students materialistic values lessen as particular financial courses credit hours increased. The findings may provide input to financial literacy modules to mitigateyoung-executive debt crises.


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