Analysis of the ergonomic usage of the ARMflex in the odontological area

The aim of this paper is to analyze the importance and applicability of ARMflex in the odontological area and its influence in preventing or stopping the involuntary habit of improperly positioning the hand under the face or under the pillow. The ergonomic usage of ARMflex influences the design in odontological areas and innovates in the semi-immobilization of the patient to prevent future orthodontic problems.     

An empirical application of multidimensional scaling to advertising pretesting

One of the least-managed aspects of advertising management may well be that of effectiveness measurement. The problem of obtaining satisfactory indications of advertising effectiveness is particularly critical in pretesting since the rationale for pretesting is to evaluate advertisements before their release for broadscale media distribution. Therefore, the primary purpose of the research reported here is to provide empirical evidence of the value of multidimensional scaling methods to pretesting advertising. The article demonstrates how nonmetric methodology obviates the disadvantages of such methods as consumer jury tests and rating scales. A secondary purpose of the research project is to demonstrate the value of pretesting itself by comparing the perceptions of target market consumers with those of selected group of advertising professionals.     

Loan performance and race

Recent studies find evidence of racial discrimination in mortgage markets. Although these studies explore loan approval rates for whites versus minorities, they do not specifically consider loan performance, either in the form of default rates or loan administration costs. This study considers discrimination in the used car credit market, where the collateral is not subject to location externalities, collateral value and quality do not vary as much as in real estate, and the loan terms are shorter. We find administration costs and default rates are higher for minorities than for whites, controlling for age, income, home ownership, wealth, occupation, loan terms, and geographic location.     

Multilevel modelling of survey data: impact of the two-level weights used in the pseudolikelihood

Approaches that use the pseudolikelihood to perform multilevel modelling on survey data have been presented in the literature. To avoid biased estimates due to unequal selection probabilities, conditional weights can be introduced at each level. Less-biased estimators can also be obtained in a two-level linear model if the level-1 weights are scaled. In this paper, we studied several level-2 weights that can be introduced into the pseudolikelihood when the sampling design and the hierarchical structure of the multilevel model do not match. Two-level and three-level models were studied. The present work was motivated by a study that aims to estimate the contributions of lead sources to polluting the interior floor dust of the rooms within dwellings. We performed a simulation study using the real data collected from a French survey to achieve our objective. We conclude that it is preferable to use unweighted analyses or, at the most, to use conditional level-2 weights in a two-level or a three-level model. We state some warnings and make some recommendations.     

FACSGen: A Tool to Synthesize Emotional Facial Expressions Through Systematic Manipulation of Facial Action Units

To investigate the perception of emotional facial expressions, researchers rely on shared sets of photos or videos, most often generated by actor portrayals. The drawback of such standardized material is a lack of flexibility and controllability, as it does not allow the systematic parametric manipulation of specific features of facial expressions on the one hand, and of more general properties of the facial identity (age, ethnicity, gender) on the other. To remedy this problem, we developed FACSGen: a novel tool that allows the creation of realistic synthetic 3D facial stimuli, both static and dynamic, based on the Facial Action Coding System. FACSGen provides researchers with total control over facial action units, and corresponding informational cues in 3D synthetic faces. We present four studies validating both the software and the general methodology of systematically generating controlled facial expression patterns for stimulus presentation.     

Beyond Association: How Employees Want to Participate in Their Firms' Corporate Social Performance

Although many studies have found a positive relationship between corporate social performance and employer attractiveness, few have examined how different forms of responsibility might mediate that attraction, particularly when those social practices afford different degrees of employee participation. The current study undertook this line of inquiry by examining prospective employees’ attraction to three common approaches to corporate social performance (CSP) that offer increasing levels of participation: donation, volunteerism, and operational integration. Unexpectedly, findings from an empirical investigation challenged the study's main hypothesis; that is, prospective employees were least attracted to firms that integrated their social and financial goals. Consequently, important implications and questions remain for both employers and business educators.     

Theory‐Testing, Generalization, and the Problem of External Validity

External validity refers to the generalization of research findings, either from a sample to a larger population or to settings and populations other than those studied. While definitions vary, discussions generally agree that experiments are lower in external validity than other methodological approaches. Further, external validity is widely treated as an issue to be addressed through methodological procedures. When testing theories, all measures are indirect indicators of theoretical constructs, and no methodological procedures taken alone can produce external validity. External validity can be assessed through determining (1) the extent to which empirical measures accurately reflect theoretical constructs, (2) whether the research setting conforms to the scope of the theory under test, (3) our confidence that findings will repeat under identical conditions, (4) whether findings support the theory being tested, and (5) the confirmatory status of the theory under test. In these ways, external validity is foremost a theoretical issue and can only be addressed by an examination of the interplay between theory and methods.