Estimating the reliability coefficient of tests in presence of missing values

Resumen tomado de la publicaci??n

Inequalities of the results of the PISA tests due to teacher???s factors : differences between countries

T??tulo, resumen y palabras clave tambi??n en espa??ol

Traditional scores versus IRT estimates on forced-choice tests based on a dominance model

Resumen tomado de la publicaci??n

A comparison of discriminant logistic regression and Item Response Theory Likelihood-Ratio Tests for Differential Item Functioning (IRTLRDIF) in polytomous short tests

Resumen tomado de la publicaci??n

The influence of an in-service programme on primary teachers conceptions about practical work

Monogr??fico con el t??tulo: " Formaci??n de profesores. Perspectivas de Brasil, Colombia, Espa??a y Portugal"

Oxidation of silicon: further tests for the interfacial silicon emission model

The classical description of Si oxidation given by Deal and Grove has well-known limitations for thin oxides (below 200 Ã). Among the large number of alternative models published so far, the interfacial emission model has shown the greatest ability to fit the experimental oxidation curves. It relies on the assumption that during oxidation Si interstitials are emitted to the oxide to release strain and that the accumulation of these interstitials near the interface reduces the reaction rate there. The resulting set of differential equations makes it possible to model diverse oxidation experiments. In this paper, we have compared its predictions with two sets of experiments: (1) the pressure dependence for subatmospheric oxygen pressure and (2) the enhancement of the oxidation rate after annealing in inert atmosphere. The result is not satisfactory and raises serious doubts about the model’s correctness

Practical applications of quantum molecular similarity measures (QMSM): programs and examples

Es descriu l'aproximació de Capes Atòmiques dins de la teoria de la Semblança Molecular Quàntica. Partint només de dades teòriques, s'ha trobat una relació entre estructura molecular i activitat biològica per a diversos conjunts de molècules. Es descriuen els aspectes teòrics de la Semblança Molecular Quàntica i alguns exemples d'aplicació

Explorando o teste de provocação com oxigénio como modelo de avaliação da microcirculação

A microcirculação cutânea surgiu, nos últimos anos, como uma alternativa pratica e acessível para o estudo da circulação periférica. Técnicas não-invasivas, como a Fluxometria por Laser Doppler (FLD), a Evaporimetria e a Gasimetria transcutânea em associação a testes de provocação têm transformado a circulação cutânea num atraente modelo de investigação. Este estudo foi aplicado a um grupo de voluntárias jovens saudáveis (n = 8, (21,6 ± 2,6) anos) respirando uma atmosfera de 100 % oxigénio durante 10 minutos. Este teste permitiu-nos avaliar a resposta circulatória na microcirculação do membro inferior. As técnicas de medição incluíram o fluxo sanguíneo local por FLD, a pO2 transcutânea (tc) e a Perda Transepidérmica de Água (PTEA) por evaporimetria. A análise de dados revela que tc-pO2 e FLD se alteraram significativamente durante o teste. Um perfil de evolução recíproca foi registrado para FLD e PTEA, que parece apoiar dados anteriores de que as alterações no fluxo sanguíneo local podem influenciar a função de “barreira” epidérmica. Este modelo parece adequado para caracterizar a microcirculação do membro inferior in vivo.

Inter-comparisons of articulation tests on normal and hard-of-hearing listeners

This paper discusses a study undertaken to test various speech discrimination tests.

A comparison of the QuickSIN and TEN tests: two recent tests designed to predict patient benefit from high frequency amplification

This paper presents a comparison of two tests designed to predict which hearing impaired patients may benefit from high frequency amplification.

An analysis of the Woodcock Reading Mastery Tests and the Diagnostic Reading Scales for use with hearing-impaired children

This paper examines two individually administered diagnostic reading tests, the Woodcock Reading Mastery Tests and the Diagnostic Reading Scales, to determine their value for use with hearing-impaired children.

Comparison of video and toy reinforcers to motivate infants/toddlers for hearing tests

This paper is a study of the effectiveness between video and toy reinforcer types to motivate infants/toddlers for hearing tests. No significant differences were found between age groups or gender. Toy reinforcers were found to produce on average two more threshold estimates compared to video reinforcers. Variety, color and animation of animals may have contributed to this difference.

Comparing two receptive vocabulary tests: The receptive one word vocabulary test and the peabody picture vocabulary test

This paper discusses a study to determine whether the Receptive One Word Picture Vocabulary Test is more useful than the Peabody Picture Vocabulary Test in assessing the vocabularies of hearing imparied children.

Are our tests accurate?

This paper presents a study investigating the accuracy of two standardized individual achievement tests, the Wechsler Individual Achievement (WIAT) and the Peabody Individual Achievement Test-Revised (PIAT-R). The study compares the students' scores and includes students' opinions of the tests.