scholarly journals Moderator veranderlikes en differensiele geldigheid van die aansoekvorm

1977 ◽  
Author(s):  
A. De Bod
Keyword(s):  
Empirical Evidence ◽  
Predictive Validity ◽  
Empirical Studies ◽  
Moderating Effects ◽  
Moderator Variables ◽  
New Approach ◽  
Psychometric Theory ◽  
Application Blank ◽  
Selection Of

Empirical studies have shown the Weighted Application Blank (W.A.B.) to be an effective predictive device in the selection of employees. There are, however, studies which suggest that the predictive validity of the W.A.B. may be substantially overstated in the literature. Contrary to the principles of classic psychometric theory it is suggested that moderator variables are accountable for this paradox. This study demonstrates how biographical correlates of tenure function as moderators and empirical evidence of the moderating effects on the predictive validity of the W.A.B. are provided. It is suggested that a new approach to the development of the W.A.B. is necessary in order to utilise the effect of moderators. OpsommingEmpiriese studies toon dat die Geweegde Aansoekvorm (G.A.V.) 'n doeltreffende voorspellingsinstrument in personeelseleksie is. Daar is egter studies wat voorspel dat die voorspellingsgeldigheid van die G.A.V. in die literatuur aansienlik oorbeklemtoon word. Teenstrydig met die beginsels van klassieke psigometriese teorie word voorgestel dat moderator veranderlikes vir hierdie paradoks verantwoordelik is. Hierdie studie toon hoe die biografiese korrelate van dienstyd as moderators fungeer en empiriese bewys van die modererende effek op die voorspellingsgeldigheid van die G.A.V. word gelewer. Daar word voorgestel dat ‘n nuwe benadering tot die ontwikkeling van die G.A.V. noodsaaklik is ten einde die effek van moderators te benut.

Digital Games for Computing Education

2019 ◽  
pp. 35-62
Author(s):  
Giani Petri ◽  
Christiane Gresse von Wangenheim ◽  
Adriano Ferreti Borgatto ◽  
Alejandro Calderón ◽  
Mercedes Ruiz
Keyword(s):  
Empirical Evidence ◽  
Instructional Strategy ◽  
Instructional Methods ◽  
Educational Games ◽  
Empirical Studies ◽  
Digital Games ◽  
Comprehensive Analysis ◽  
Computing Education ◽  
Positive Effect ◽  
Selection Of

Digital games are considered an effective and efficient instructional strategy for computing education. However, there are few empirical studies providing sound evidence on the benefits of such educational games. In this respect, the objective of this chapter is to present a comprehensive analysis in order to summarize empirical evidence on the benefits of digital games used as an instructional strategy for computing education. The analysis is based on data collected from 21 case studies that use the MEEGA model, the most commonly used model for educational games' evaluation, evaluating 9 different games, involving a population of 344 students. The results indicate that digital games can yield a positive effect on the learning of computing, providing a pleasant and engaging experience to the students and motivating them to study. These results may guide instructors in the selection of educational games as instructional methods and guide game creators with respect to the development of new games.

Digital Games for Computing Education

2022 ◽  
pp. 1571-1598
Author(s):  
Giani Petri ◽  
Christiane Gresse von Wangenheim ◽  
Adriano Ferreti Borgatto ◽  
Alejandro Calderón ◽  
Mercedes Ruiz
Keyword(s):  
Empirical Evidence ◽  
Instructional Strategy ◽  
Instructional Methods ◽  
Educational Games ◽  
Empirical Studies ◽  
Digital Games ◽  
Comprehensive Analysis ◽  
Computing Education ◽  
Positive Effect ◽  
Selection Of

Digital games are considered an effective and efficient instructional strategy for computing education. However, there are few empirical studies providing sound evidence on the benefits of such educational games. In this respect, the objective of this chapter is to present a comprehensive analysis in order to summarize empirical evidence on the benefits of digital games used as an instructional strategy for computing education. The analysis is based on data collected from 21 case studies that use the MEEGA model, the most commonly used model for educational games' evaluation, evaluating 9 different games, involving a population of 344 students. The results indicate that digital games can yield a positive effect on the learning of computing, providing a pleasant and engaging experience to the students and motivating them to study. These results may guide instructors in the selection of educational games as instructional methods and guide game creators with respect to the development of new games.

Spotting a liar by looking for microexpressions: Challenges and Opportunities

2019 ◽  
Author(s):  
Xunbing Shen
Keyword(s):  
Empirical Evidence ◽  
Deception Detection ◽  
Empirical Studies ◽  
High Stake ◽  
Challenges And Opportunities ◽  
Cues To Deception ◽  
The Relationship

Microexpressions do exist, and they are regarded as valid cues to deception by many researchers, furthermore, there is a lot of empirical evidence which substantiates this claim. However, some researchers don’t think the microexpression can be a way to catch a liar. The author elucidates the theories predicting that looking for microexpressions can be a way to catch a liar, and notes that some data can support for the utilization of microexpressions as a good way to detect deception. In addition, the author thinks that the mixed results in the area of investigating microexpressions and deception detection may be moderated by the stake. More empirical studies which employ high-stake lies to explore the relationship between microexpressions and deception detection are needed.

Acquiring “Knowledge”—An Alternative Model

2017 ◽  
Author(s):  
Avner Baz
Keyword(s):  
Language Acquisition ◽  
Empirical Evidence ◽  
Alternative Model ◽  
Empirical Studies ◽  
First Language ◽  
Analytic Philosophy ◽  
Empirical Science ◽  
First Language Acquisition ◽  
Method Of Cases ◽  
Striking Fact

The chapter argues that empirical studies of first-language acquisition lend support to the Wittgensteinian-Merleau-Pontian conception of language as against the prevailing conception that underwrites the method of cases in either its armchair or experimental version. It offers a non-representationalist model, inspired by the work of Michael Tomasello, for the acquisition of “knowledge,” with the aim of showing that we could fully account for the acquisition of this and other philosophically troublesome words without positing independently existing “items” to which these words refer. The chapter also aims at bringing out and underscoring the striking fact that, whereas many in contemporary analytic philosophy regard and present themselves as open and attentive to empirical science, they have often relied on a conception of language that has been supported by no empirical evidence.

scholarly journals Collective Losses of Low Power Cage Induction Motors—A New Approach

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1749
Author(s):  
Elzbieta Szychta ◽  
Leszek Szychta
Keyword(s):  
Control System ◽  
Experimental Studies ◽  
Complex Problem ◽  
Accurate Estimation ◽  
New Approach ◽  
Water Pumping ◽  
Efficiency Control ◽  
Interacting Systems ◽  
Cage Induction Motor ◽  
Selection Of

Energy efficiency of systems of water pumping is a complex problem since efficiency of two distinct interacting systems needs to be combined: water and power supply. This paper introduces a non-intrusive method of calculating the so-called “collective losses” of a cage induction motor. The term “collective losses”, which the authors define, allows for accurate estimation of motor efficiency. Control system of a pump determines operating point of a pumping station, and thus its efficiency. General estimated performance characteristics of a motor, components of a control system, are assumed to serve selection of a range of pumping speed variations. Rotational speed has a direct effect on motor load torque, pump power and head, and thus on motor performance. Hellwig’s statistical method was used to specify characteristics of estimated collective losses on the basis of experimental studies of 21 motors rated at up to 2.2 kW. The results of simulations and experiments are used to verify validity and efficiency of the suggested method. The method is non-intrusive, simple to use, and requires minimum data.

Analysis of yield and oil from a series of canola breeding trials. Part II. Exploring variety by environment interaction using factor analysisThis article is one of a selection of papers from the conference “Exploiting Genome-wide Association in Oilseed Brassicas: a model for genetic improvement of major OECD crops for sustainable farming”.

Genome ◽  
2010 ◽  
Vol 53 (11) ◽  
pp. 1002-1016 ◽  
Author(s):  
B.R. Cullis ◽  
A.B. Smith ◽  
C.P. Beeck ◽  
W.A. Cowling
Keyword(s):  
Pedigree Information ◽  
Environment Interaction ◽  
Correlation Matrices ◽  
New Approach ◽  
Genome Wide ◽  
Selection Indices ◽  
New Varieties ◽  
Oilseed Brassicas ◽  
Analytic Models ◽  
Selection Of

Exploring and exploiting variety by environment (V × E) interaction is one of the major challenges facing plant breeders. In paper I of this series, we presented an approach to modelling V × E interaction in the analysis of complex multi-environment trials using factor analytic models. In this paper, we develop a range of statistical tools which explore V × E interaction in this context. These tools include graphical displays such as heat-maps of genetic correlation matrices as well as so-called E-scaled uniplots that are a more informative alternative to the classical biplot for large plant breeding multi-environment trials. We also present a new approach to prediction for multi-environment trials that include pedigree information. This approach allows meaningful selection indices to be formed either for potential new varieties or potential parents.

The Relationship Between Proof and Certainty in Mathematical Practice

2022 ◽  
Vol 53 (1) ◽  
pp. 65-84
Keyword(s):  
Empirical Evidence ◽  
Doctoral Students ◽  
Empirical Studies ◽  
Mathematical Practice ◽  
Advanced Mathematics ◽  
Mathematics Educators ◽  
The Relationship

Many mathematics educators believe a goal of instruction is for students to obtain conviction and certainty in mathematical statements using the same types of evidence that mathematicians do. However, few empirical studies have examined how mathematicians use proofs to obtain conviction and certainty. We report on a study in which 16 advanced mathematics doctoral students were given a task-based interview in which they were presented with various sources of evidence in support of a specific mathematical claim and were asked how convinced they were that the claim was true after reviewing this evidence. In particular, we explore why our participants retained doubts about our claim after reading its proof and how they used empirical evidence to reduce those doubts.

scholarly journals Facing disruptive technologies: aligning purchasing maturity to contingencies

2019 ◽  
Vol 24 (1) ◽  
pp. 147-169 ◽  
Author(s):  
Britta Søgaard ◽  
Heather Dawn Skipworth ◽  
Michael Bourlakis ◽  
Carlos Mena ◽  
Richard Wilding
Keyword(s):  
Strategic Alignment ◽  
Future Research ◽  
Research Directions ◽  
Company Strategy ◽  
New Approach ◽  
Content Type ◽  
Disruptive Technologies ◽  
Future Research Directions ◽  
Exploratory Case Studies ◽  
Selection Of

PurposeThis paper aims to explore how purchasing could respond to disruptive technologies by examining the assumptions underlying purchasing strategic alignment and purchasing maturity through a contingency lens.Design/methodology/approachThis study uses a systematic review across purchasing maturity and purchasing strategic alignment literature. This is supplemented with exploratory case studies to include practitioners’ views.FindingsThis research demonstrates that neither purchasing maturity nor purchasing strategic alignment are suitable approaches to respond to disruptive technologies. Purchasing maturity does not allow purchasing managers to select relevant practices. It also shows no consideration of any contingencies, which practitioners highlight as important for the selection of practices. Purchasing strategic alignment includes the company strategy as a contingency but does not provide any practices to choose from. It does not include any other contextual contingencies considered important by practitioners. The findings indicate that linking the two research streams may provide a more suitable approach to responding to disruptive technologies.Research limitations/implicationsThis research demonstrates the requirement to develop a new approach to responding to disruptive technologies, by linking purchasing maturity and purchasing strategic alignment to contextual contingencies. This is a currently unexplored approach in academic literature, which refutes the generally accepted premise that higher maturity unilaterally supports a better positioning towards technological disruption. This research also highlights a requirement for practitioners to shift their approach to “best practices”.Originality/valueThis is the first research to systematically review the relationships between purchasing maturity and purchasing strategic alignment. It adds to contingency theory by suggesting that purchasing maturity models can support the achievement of strategic alignment. Also, future research directions are suggested to explore these relationships.

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