Validité des instruments de décision pour l'évaluation des enseignants?

A review of the literature shows that the use of teacher evaluation in public education is widespread. This seems paradoxical when one considers the amount of criticism levied at them by a various groups. The present study was designed in order to deal with the problems of validity and reliability of teacher evaluation instruments planned for the purpose of teachers' promotion or for awarding merit pay. Based upon a review of the literature and school inspectors' judgements, a teacher evaluation instrument including 25 items has been constructed. The instrument has been tested by five school inspectors and 180 school principals. Following their judgements and the factor analysis run upon the data, a face validity and a content validity of the developed instrument emerged. However, conclusions concerning the reliability of the instrument have to be treated with caution. The use of an instrument of this type is justified only for making preliminary decisions as to the eligibility of teachers for further consideration for promotion or for merit pay. L'analyse de la littérature professionnelle montre l'utilisation croissante dans les établissements publics des instruments d'évaluation des enseignants. Ceci parait paradoxal si l'on tient compte des critiques importantes formulées à leur encontre par des groupes différents. La présente étude traite des problèmes de validitéet de fiabilitédes instruments d'évaluation des enseignants pour les décisions de promotion et de rémunération ''de mérite''. Se fondant sur la littérature professionnelle et sur les appréciations formulées par les inspecteurs scolaires, elle a élaboré un instrument représentatif d'évaluation des enseignants comportant 25 éléments. L'instrument a été testé auprès de 5 inspecteurs et de 180 directeurs d'école. Les résultats révèlent que cet instrument possède une validitéde contenu établie sur la littérature professionnelle, sur l'appréciation des inspecteurs scolaires et sur les résultats d'une analyse de facteurs fondée sur les réponses des directeurs d'école au questionnaire proposé. Toutefois, en ce qui concerne la fiabilité, les conclusions sont plus nuancées. L'utilisation d'instruments de ce type semble uniquement efficace pour la détermination préliminaire de ceux qui au sein des enseignants auraient droit ensuite à un examen plus précis de leurs mérites en vue de promotion ou de rémunérations. El análisis de la literatura profesional evidencia el uso creciente en los establecimientos públicos de instrumentos de evaluación de los profesores. Esto podría parecer paradójico si se tienen en cuenta las críticas importantes formuladas por diferentes grupos. El presente estudio trata de los problemas de validez y de fiabilidad de los instrumentsos de evaluación de los profesores para las decisiones de promoción y de remuneración ''del mérito''. Tomando como base la literatura profesional y las apreciaciones formuladas por los inspectores escolares, se ha elaborado un instrumento representativo de la evaluación de los profesores que comporta 25 elementos. El instrumento se sometióa prueba con 5 inspectores y 180 directores de escuela. Los resultados revelan que este instrumento representativo posee una validez de contenido establecida a partir de la literatura profesional, de la apreciación de los inspectores escolares y de los resultados de un análisis de factores que se fundamenta en las respuestas al cuestionario de directores de escuela. Sin embargo, en lo que se refiere a la fiabilidad de contenido, las conclusiones no son tan definidas. El uso de instrumentos de este tipo parece únicamente eficaz para la determinación preliminar de aquellos profesores que podrian tener derecho en una fase posterior, a pasar un examen más preciso de sus méritos para una promoción o remuneración. Sin embargo, dicho grupo de profesores una vez identificado, el instrumento no parece ser lo suficientemente fiable para la decisión de una promoción y convendría desarrollar enfoques complementarios. Ein Überblick über die Fachliteratur zeigt, dass sich die Verwendung Lehrerbewertungen immer mehr verbreitet, obwohl es paradoxalerweise von verschiedenen Gruppen stark kritisiert wird. Die vorliegende Studie beschäftigt sich mit den Problemen der Gültgkeit und Zuverlässigkeit von den Lehrerbewertungsmitteln, in Bezug auf die Beförderungsentscheidungen und auf die Leistungsentlohnungen. Sie hat, gestützt auf die Fachliteratur und auf die Ansichten der Schulraten, einen Bewertungssystem der Lehrer in 25 Punkten entworfen. Dieses Bewertungssystem wurde von 25 Schulraten und von 180 Schuldirektoren geprüft. Ihre Ansichten, sowie die Faktorenanalyse der Daten, bestätigen die Gültigkeit dieses Instrumentes. Die Benutzung eines Instrumentes dieser Art sollte zu einer ersten Entscheidung führen, dessen Inhalt nur die Berechtigung der Lehrer zur Beförderung, zur Leistungsentlohnung und zur weitere Untersuchung beinflussen sollte.     

Towards a heuristic frame for transferring e-government technology

This article addresses challenges in accomplishing technology transfer process involving the adaptation and implementation of e-government applications from a donor country to a recipient country. Here it is claimed that prior e-government research has overlooked existing technology transfer literature from the field of knowledge management. This work is aimed at addressing the underlying issues associated with the transfer of e-government technology, given different characteristics of donor and recipient organizations in terms of the socio-economic context and the dynamics of the technological infrastructure. Based on a review, interpretation, and synthesis of a broad range of both technology transfer, e-government and knowledge management literature, we extend the Information Technology Transfer Life-Cycle Model, as this well-known model was derived entirely based on empirical evidence. To this end, we propose a heuristic frame for e-government technology transfer. Finally, five propositions accrued from both the literature review and the proposed heuristic frame are set forth to be further tested, in order to better understand the process dynamics of e-government technology transfer between countries.     

Question Asking in the Science Classroom: Teacher Attitudes and Practices

Despite the wide agreement among educators that classroom learning and teaching processes can gain much from student and teacher questions, their potential is not fully utilized. Adopting the view that reporting both teachers’ (of varying age groups) views and actual classroom practices is necessary for obtaining a more complete view of the phenomena at hand, the present study closely examines both cognitive and affective domains of: (a) teachers’ views (via interviews) concerning: (1) importance and roles of teacher and student questions, (2) teacher responses, and (3) planning and teacher training; and (b) teachers’ actual practices (via classroom observations) concerning: (1) number and (2) level of teacher and student questions, as well as (3) teachers’ responses to questions. The data were collected from 3 elementary, 3 middle, and 3 high school science teachers and their respective classroom students. The findings lay out a wide view of classroom questioning and teachers’ responses, and relate what actually occurs in classes to teachers’ stated views. Some of the study’s main conclusions are that a gap exists between how science researchers and teachers view the role of teacher questions: the former highlight the cognitive domain, while the latter emphasize the affective domain.     

Evaluating a Contextual-Based Course on Data Analysis for the Physics Laboratory

The interpretation of data and construction and understanding of graphs are central practices in science; therefore, an important skill needed in the undergraduate physics laboratory is the ability to analyze data obtained from experiments. Often students are not able to reach logical deductions based on data, acquired from the experiments that they conducted, because they lack appropriate analysis skills. The aim of this study is to evaluate the effectiveness of a short teaching unit developed for this purpose, among undergraduate students. Learning in context approach was implemented in building the unit. Also, both procedural and conceptual knowledge were given emphasis. The “data analysis” questionnaire was used to compare the results between the experimental group and control group. The findings indicate that students who participated in the teaching unit arrived at significantly better results in the data analysis questionnaire as compared to students in the control group. This study may contribute to those who wish to design a contextual-based learning environment for physics laboratory data analysis.     

Applying the technology acceptance model to a Spanish City Hall

This paper examines the relative importance and significance of the four technology enablers introduced by Davis (1989) in the technology acceptance model (TAM) (perceived ease of use, perceived usefulness, attitude towards using and behavioural intention) for use on four different levels of citizen engagement in e-government (null, publish, interact and transact). An extended technology acceptance model (TAM) is developed to test citizen engagement towards online e-government services from a sample of 307 citizens who used the benefits advisor tool within a Spanish City Hall. Although the proposed model follows TAM and explains the intention towards the actual use of e-government by postulating four direct determinants, “A, PU, PEOU and BI” have been considered as parallel processes, meaning that each can have separate influence in different levels of citizen engagement. To achieve this goal, a multinomial logistic regression is developed and tested to confirm the explanatory power of the four technology enablers on the four different levels of e-government. Our findings further suggest that in order to implement e-government, some of the enablers matter more than others to move from one level of citizen engagement to another. The main contribution of the paper is to question the use of existing models which seek to represent the relationship between technology enablers and the adoption of e-government services without considering their impacts on citizens’ engagement. The implications of the findings are discussed and useful insights are provided in relation to policy recommendations geared to create appropriate conditions to build citizens’ engagement intent of use of e-government services.     

Contamination of lithium heparin blood by K2-ethylenediaminetetraacetic acid (EDTA): an experimental evaluation

Introduction:

The contamination of serum or lithium heparin blood with ethylenediaminetetraacetic acid (EDTA) salts may affect accuracy of some critical analytes and jeopardize patient safety. The aim of this study was to evaluate the effect of lithium heparin sample contamination with different amounts of K₂EDTA.

Materials and methods:

Fifteen volunteers were enrolled among the laboratory staff. Two lithium heparin tubes and one K₂EDTA tube were collected from each subject. The lithium-heparin tubes of each subject were pooled and divided in 5 aliquots. The whole blood of K₂EDTA tube was then added in scalar amount to autologous heparinised aliquots, to obtained different degrees of K₂EDTA blood volume contamination (0%; 5%; 13%; 29%; 43%). The following clinical chemistry parameters were then measured in centrifuged aliquots: alanine aminotranspherase (ALT), bilirubin (total), calcium, chloride, creatinine, iron, lactate dehydrogenase (LD), lipase, magnesium, phosphate, potassium, sodium.

Results:

A significant variation starting from 5% K₂EDTA contamination was observed for calcium, chloride, iron, LD, magnesium (all decreased) and potassium (increased). The variation of phosphate and sodium (both increased) was significant after 13% and 29% K₂EDTA contamination, respectively. The values of ALT, bilirubin, creatinine and lipase remained unchanged up to 43% K₂EDTA contamination. When variations were compared with desirable quality specifications, the bias was significant for calcium, chloride, LD, magnesium and potassium (from 5% K₂EDTA contamination), sodium, phosphate and iron (from 29% K₂EDTA contamination).

Conclusions:

The concentration of calcium, magnesium, potassium, chloride and LD appears to be dramatically biased by even modest K₂EDTA contamination (i.e., 5%). The values of iron, phosphate, and sodium are still reliable up to 29% K₂EDTA contamination, whereas ALT, bilirubin, creatinine and lipase appear overall less vulnerable towards K₂EDTA contamination.     

Balancing technology and physician-patient knowledge through an unlearning context

The Spanish health care system has undergone important changes with regard to the development of new homecare services known as “Hospital in the Home”. This paper investigates the approaches that hospital in the home units (HHUs) have used to update physician/patient knowledge and the technology knowledge of their members and relates them to an unlearning context and improvement in the quality of health services. These relationships are examined through an empirical investigation of 55 doctors and 62 nurses belonging to 44 HHUs. The research findings suggest that the key benefits of an unlearning context in HHUs are clear: it enables them to identify and replace poor practices and also avoids the reinvention of the wheel; it enables cost reduction by minimizing unnecessary work caused by the use of poor methods; and it enables improvements in services to patients.     

Effects of motion control footwear on running: a systematic review

Excessive foot pronation is a risk factor of running injuries and motion control footwear is designed to control foot pronation. With the movement transfer between foot pronation and tibial rotation, motion control footwear may not only be confined to controlling foot pronation. In view of the controversies in the literature on effectiveness of motion control footwear, this paper reviewed the efficacy of motion control footwear functions as reported in the literature. Eligible studies were identified from seven electronic databases. Two independent authors extracted the data and assessed the methodological qualities using the Jadad Scale. A total of 14 quasi randomised controlled trials were included. Even though the included studies were rated as "low quality" according to the Jadad Scale, the data were pooled and analysed. Results revealed that motion control footwear was effective in reducing the amount of foot pronation and the peak vertical impact during landing. There is no evidence that suggests motion control footwear for controlling kinematics of the proximal segments.     

Avoidance to wipe alcohol before venipuncture is not a source of spurious hemolysis

Background

It is still uncertain whether or not avoidance to let disinfectant alcohol dry at the site of venipuncture is a source of spurious hemolysis when drawing venous blood.

Methods:

In a consecutive series of 52 outpatients referred for routine laboratory testing, venous blood was drawn by direct venipuncture with (odd group) or without (pair group) wiping 70% isopropyl alcohol at the site of venipuncture. A 3.5 mL evacuated tube with clot activator and gel separator was drawn from a vein of the upper limb, serum was immediately separated with standard centrifugation and tested for potassium, lactate dehydrogenase (LD), aspartate aminotransferase (AST) and hemolysis index (HI) on Roche Cobas.

Results:

No specimen was discarded for unsatisfactory venipuncture. No differences for age and gender were observed between groups. As regards the four parameters investigated, no significant differences could be observed between patients in whom blood was drawn with or without letting the alcohol dry. It is also noteworthy that no sample in both groups exceeded the conventional sample rejection threshold of cell-free hemoglobin.

Conclusions:

The results of our prospective, randomized study attest that failure to wipe alcohol at the site of venipuncture should not be considered as a potential source of spurious hemolysis when drawing blood.