03049nas a2200241   4500008004100000020004100041245017000082210007100252250001500323300001000338490000700348520214300355653001402498653006602512653001102578653001302589100001402602700001202616700001402628700001502642700001702657856013302674       2010                        spa d  a0214-9915 (Print)0214-9915 (Linking)00aDeterioro de parámetros de los ítems en tests adaptativos informatizados: estudio con eCAT [Item parameter drift in computerized adaptive testing: Study with eCAT]0 aDeterioro de parámetros de los ítems en tests adaptativos inform  a2010/04/29  a340-70 v223 a<p>En el presente trabajo se muestra el an&aacute;lisis realizado sobre un Test Adaptativo Informatizado (TAI) dise&ntilde;ado para la evaluaci&oacute;n del nivel de ingl&eacute;s, denominado eCAT, con el objetivo de estudiar el deterioro de par&aacute;metros (parameter drift) producido desde la calibraci&oacute;n inicial del banco de &iacute;tems. Se ha comparado la calibraci&oacute;n original desarrollada para la puesta en servicio del TAI (N= 3224) y la calibraci&oacute;n actual obtenida con las aplicaciones reales del TAI (N= 7254). Se ha analizado el Funcionamiento Diferencial de los &Iacute;tems (FDI) en funci&oacute;n de los par&aacute;metros utilizados y se ha simulado el impacto que sobre el nivel de rasgo estimado tiene la variaci&oacute;n en los par&aacute;metros. Los resultados muestran que se produce especialmente un deterioro de los par&aacute;metros a y c, que hay unimportante n&uacute;mero de &iacute;tems del banco para los que existe FDI y que la variaci&oacute;n de los par&aacute;metros produce un impacto moderado en la estimaci&oacute;n de &theta; de los evaluados con nivel de ingl&eacute;s alto. Se concluye que los par&aacute;metros de los &iacute;tems se han deteriorado y deben ser actualizados.Item parameter drift in computerized adaptive testing: Study with eCAT. This study describes the parameter drift analysis conducted on eCAT (a Computerized Adaptive Test to assess the written English level of Spanish speakers). The original calibration of the item bank (N = 3224) was compared to a new calibration obtained from the data provided by most eCAT operative administrations (N =7254). A Differential Item Functioning (DIF) study was conducted between the original and the new calibrations. The impact that the new parameters have on the trait level estimates was obtained by simulation. Results show that parameter drift is found especially for a and c parameters, an important number of bank items show DIF, and the parameter change has a moderate impact on high-level-English &theta; estimates. It is then recommended to replace the original estimates by the new set. by the new set.</p>
10a*Software10aEducational Measurement/*methods/*statistics & numerical data10aHumans10aLanguage1 aAbad, F J1 aOlea, J1 aAguado, D1 aPonsoda, V1 aBarrada, J R  uhttp://www.iacat.org/content/deterioro-de-par%C3%A1metros-de-los-%C3%ADtems-en-tests-adaptativos-informatizados-estudio-con-ecat02926nas a2200145   4500008004100000245009900041210006900140300001100209490000700220520238700227100001202614700001402626700001702640856012302657       2010                        eng d00aTests informatizados y otros nuevos tipos de tests [Computerized and other new types of tests]0 aTests informatizados y otros nuevos tipos de tests Computerized   a94-1070 v313 aRecientemente se ha producido un considerable desarrollo de los tests adaptativos informatizados, en los que el test se adapta progresivamente al rendimiento del evaluando, y de otros tipos de tests: a) los test basados en modelos (se dispone de un modelo o teoría de cómo se responde a cada ítem, lo que permite predecir su dificultad), b) los tests ipsativos (el evaluado ha de elegir entre opciones que tienen parecida deseabilidad social, por lo que pueden resultar eficaces para controlar algunos sesgos de respuestas), c) los tests conductuales (miden rasgos que ordinariamente se han venido midiendo con autoinformes, mediante tareas que requieren respuestas no verbales) y d) los tests situacionales (en los que se presenta al evaluado una situación de conflicto laboral, por ejemplo, con varias posibles soluciones, y ha de elegir la que le parece la mejor descripción de lo que el haría en esa situación). El artículo comenta las características, ventajas e inconvenientes de todos ellos y muestra algunos ejemplos de tests concretos. Palabras clave: Test adaptativo informatizado, Test situacional, Test comportamental, Test ipsativo y generación automática de ítems.The paper provides a short description of some test types that are earning considerable interest in both research and applied areas. The main feature of a computerized adaptive test is that in despite of the examinees receiving different sets of items, their test scores are in the same metric and can be directly compared. Four other test types are considered: a) model-based tests (a model or theory is available to explain the item response process and this makes the prediction of item difficulties possible), b) ipsative tests (the examinee has to select one among two or more options with similar social desirability; so, these tests can help to control faking or other examinee’s response biases), c) behavioral tests (personality traits are measured from non-verbal responses rather than from self-reports), and d) situational tests (the examinee faces a conflictive situation and has to select the option that best describes what he or she will do). The paper evaluates these types of tests, comments on their pros and cons and provides some specific examples. Key words: Computerized adaptive test, Situational test, Behavioral test, Ipsative test and y automatic item generation.1 aOlea, J1 aAbad, F J1 aBarrada, J R  uhttp://www.iacat.org/content/tests-informatizados-y-otros-nuevos-tipos-de-tests-computerized-and-other-new-types-tests02949nas a2200205   4500008004100000020004100041245009800082210006900180250001500249260000800264300001200272490000700284520217900291653004302470653006402513100001702577700001402594700001802608856011702626       2009                        eng d  a0214-9915 (Print)0214-9915 (Linking)00aComparison of methods for controlling maximum exposure rates in computerized adaptive testing0 aComparison of methods for controlling maximum exposure rates in   a2009/05/01  cMay  a313-3200 v213 aThis paper has two objectives: (a) to provide a clear description of three methods for controlling the maximum exposure rate in computerized adaptive testing —the Symson-Hetter method, the restricted method, and the item-eligibility method— showing how all three can be interpreted as methods for constructing the variable sub-bank of items from which each examinee receives the items in his or her test; (b) to indicate the theoretical and empirical limitations of each method and to compare their performance. With the three methods, we obtained basically indistinguishable results in overlap rate and RMSE (differences in the third decimal place). The restricted method is the best method for controlling exposure rate, followed by the item-eligibility method. The worst method is the Sympson-Hetter method. The restricted method presents problems of sequential overlap rate. Our advice is to use the item-eligibility method, as it saves time and satisfies the goals of restricting maximum exposure. Comparación de métodos para el control de tasa máxima en tests adaptativos informatizados. Este artículo tiene dos objetivos: (a) ofrecer una descripción clara de tres métodos para el control de la tasa máxima en tests adaptativos informatizados, el método Symson-Hetter, el método restringido y el métodode elegibilidad del ítem, mostrando cómo todos ellos pueden interpretarse como métodos para la construcción del subbanco de ítems variable, del cual cada examinado recibe los ítems de su test; (b) señalar las limitaciones teóricas y empíricas de cada método y comparar sus resultados. Se obtienen resultados básicamente indistinguibles en tasa de solapamiento y RMSE con los tres métodos (diferencias en la tercera posición decimal). El método restringido es el mejor en el control de la tasa de exposición,seguido por el método de elegibilidad del ítem. El peor es el método Sympson-Hetter. El método restringido presenta un problema de solapamiento secuencial. Nuestra recomendación sería utilizar el método de elegibilidad del ítem, puesto que ahorra tiempo y satisface los objetivos de limitar la tasa máxima de exposición.10a*Numerical Analysis, Computer-Assisted10aPsychological Tests/*standards/*statistics & numerical data1 aBarrada, J R1 aAbad, F J1 aVeldkamp, B P  uhttp://www.iacat.org/content/comparison-methods-controlling-maximum-exposure-rates-computerized-adaptive-testing00516nas a2200145   4500008004100000245008100041210006900122300000900191490000600200100001700206700001200223700001500235700001400250856010600264       2009                        eng d00aItem selection rules in computerized adaptive testing: Accuracy and security0 aItem selection rules in computerized adaptive testing Accuracy a  a7-170 v51 aBarrada, J R1 aOlea, J1 aPonsoda, V1 aAbad, F J  uhttp://www.iacat.org/content/item-selection-rules-computerized-adaptive-testing-accuracy-and-security00587nas a2200133   4500008004100000245008400041210006900125260009700194100001700291700001200308700001500320700001400335856010400349       2009                        eng d00aTest overlap rate and item exposure rate as indicators of test security in CATs0 aTest overlap rate and item exposure rate as indicators of test s  aD. J. Weiss (Ed.), Proceedings of the 2009 GMAC Conference on Computerized Adaptive Testing.1 aBarrada, J R1 aOlea, J1 aPonsoda, V1 aAbad, F J  uhttp://www.iacat.org/content/test-overlap-rate-and-item-exposure-rate-indicators-test-security-cats00546nas a2200145   4500008004100000245009900041210006900140300001200209490000700221100001700228700001200245700001500257700001400272856011400286       2008                        eng d00aIncorporating randomness in the Fisher information for improving item-exposure control in CATs0 aIncorporating randomness in the Fisher information for improving  a493-5130 v611 aBarrada, J R1 aOlea, J1 aPonsoda, V1 aAbad, F J  uhttp://www.iacat.org/content/incorporating-randomness-fisher-information-improving-item-exposure-control-cats02174nas a2200301   4500008004100000020001400041245010200055210006900157250001500226300001200241490000700253520109000260653001501350653001501365653002101380653004801401653002401449653002801473653006201501653005701563653001101620653002701631653004601658100001701704700001201721700001401733856012501747       2008                        eng d  a1138-741600aRotating item banks versus restriction of maximum exposure rates in computerized adaptive testing0 aRotating item banks versus restriction of maximum exposure rates  a2008/11/08  a618-6250 v113 a<p>If examinees were to know, beforehand, part of the content of a computerized adaptive test, their estimated trait levels would then have a marked positive bias. One of the strategies to avoid this consists of dividing a large item bank into several sub-banks and rotating the sub-bank employed (Ariel, Veldkamp &amp; van der Linden, 2004). This strategy permits substantial improvements in exposure control at little cost to measurement accuracy, However, we do not know whether this option provides better results than using the master bank with greater restriction in the maximum exposure rates (Sympson &amp; Hetter, 1985). In order to investigate this issue, we worked with several simulated banks of 2100 items, comparing them, for RMSE and overlap rate, with the same banks divided in two, three... up to seven sub-banks. By means of extensive manipulation of the maximum exposure rate in each bank, we found that the option of rotating banks slightly outperformed the option of restricting maximum exposure rate of the master bank by means of the Sympson-Hetter method.</p>
10a*Character10a*Databases10a*Software Design10aAptitude Tests/*statistics & numerical data10aBias (Epidemiology)10aComputing Methodologies10aDiagnosis, Computer-Assisted/*statistics & numerical data10aEducational Measurement/*statistics & numerical data10aHumans10aMathematical Computing10aPsychometrics/statistics & numerical data1 aBarrada, J R1 aOlea, J1 aAbad, F J  uhttp://www.iacat.org/content/rotating-item-banks-versus-restriction-maximum-exposure-rates-computerized-adaptive-testing02212nas a2200229   4500008004100000020004600041245008500087210006900172260004500241300001000286490000600296520140300302653003401705653002301739653002601762653001701788653002601805100001701831700001201848700001501860856010701875       2007                        eng d  a1614-1881 (Print); 1614-2241 (Electronic)00aMethods for restricting maximum exposure rate in computerized adaptative testing0 aMethods for restricting maximum exposure rate in computerized ad  bHogrefe & Huber Publishers GmbH: Germany  a14-230 v33 aThe Sympson-Hetter (1985) method provides a means of controlling maximum exposure rate of items in Computerized Adaptive Testing. Through a series of simulations, control parameters are set that mark the probability of administration of an item on being selected. This method presents two main problems: it requires a long computation time for calculating the parameters and the maximum exposure rate is slightly above the fixed limit. Van der Linden (2003) presented two alternatives which appear to solve both of the problems. The impact of these methods in the measurement accuracy has not been tested yet. We show how these methods over-restrict the exposure of some highly discriminating items and, thus, the accuracy is decreased. It also shown that, when the desired maximum exposure rate is near the minimum possible value, these methods offer an empirical maximum exposure rate clearly above the goal. A new method, based on the initial estimation of the probability of administration and the probability of selection of the items with the restricted method (Revuelta & Ponsoda, 1998), is presented in this paper. It can be used with the Sympson-Hetter method and with the two van der Linden's methods. This option, when used with Sympson-Hetter, speeds the convergence of the control parameters without decreasing the accuracy. (PsycINFO Database Record (c) 2007 APA, all rights reserved)10acomputerized adaptive testing10aitem bank security10aitem exposure control10aoverlap rate10aSympson-Hetter method1 aBarrada, J R1 aOlea, J1 aPonsoda, V  uhttp://www.iacat.org/content/methods-restricting-maximum-exposure-rate-computerized-adaptative-testing03119nas a2200277   4500008004100000020002200041245010900063210006900172250001500241260000800256300001200264490000700276520221700283653002902500653002002529653002502549653002102574653001502595653002802610653001102638653002502649100001702674700001502691700001202706856012302718       2006                        eng d  a0214-9915 (Print)00aMaximum information stratification method for controlling item exposure in computerized adaptive testing0 aMaximum information stratification method for controlling item e  a2007/02/14  cFeb  a156-1590 v183 aThe proposal for increasing the security in Computerized Adaptive Tests that has received most attention in recent years is the a-stratified method (AS - Chang and Ying, 1999): at the beginning of the test only items with low discrimination parameters (a) can be administered, with the values of the a parameters increasing as the test goes on. With this method, distribution of the exposure rates of the items is less skewed, while efficiency is maintained in trait-level estimation. The pseudo-guessing parameter (c), present in the three-parameter logistic model, is considered irrelevant, and is not used in the AS method. The Maximum Information Stratified (MIS) model incorporates the c parameter in the stratification of the bank and in the item-selection rule, improving accuracy by comparison with the AS, for item banks with a and b parameters correlated and uncorrelated. For both kinds of banks, the blocking b methods (Chang, Qian and Ying, 2001) improve the security of the item bank.Método de estratificación por máxima información para el control de la exposición en tests adaptativos informatizados. La propuesta para aumentar la seguridad en los tests adaptativos informatizados que ha recibido más atención en los últimos años ha sido el método a-estratificado (AE - Chang y Ying, 1999): en los momentos iniciales del test sólo pueden administrarse ítems con bajos parámetros de discriminación (a), incrementándose los valores del parámetro a admisibles según avanza el test. Con este método la distribución de las tasas de exposición de los ítems es más equilibrada, manteniendo una adecuada precisión en la medida. El parámetro de pseudoadivinación (c), presente en el modelo logístico de tres parámetros, se supone irrelevante y no se incorpora en el AE. El método de Estratificación por Máxima Información (EMI) incorpora el parámetro c a la estratificación del banco y a la regla de selección de ítems, mejorando la precisión en comparación con AE, tanto para bancos donde los parámetros a y b correlacionan como para bancos donde no. Para ambos tipos de bancos, los métodos de bloqueo de b (Chang, Qian y Ying, 2001) mejoran la seguridad del banco.10a*Artificial Intelligence10a*Microcomputers10a*Psychological Tests10a*Software Design10aAlgorithms10aChi-Square Distribution10aHumans10aLikelihood Functions1 aBarrada, J R1 aMazuela, P1 aOlea, J  uhttp://www.iacat.org/content/maximum-information-stratification-method-controlling-item-exposure-computerized-adaptive00465nas a2200121   4500008004100000245006900041210006900110260002200179100001700201700001800218700001200236856009500248       2006                        eng d00aMultiple maximum exposure rates in computerized adaptive testing0 aMultiple maximum exposure rates in computerized adaptive testing  aBudapest, Hungary1 aBarrada, J R1 aVeldkamp, B P1 aOlea, J  uhttp://www.iacat.org/content/multiple-maximum-exposure-rates-computerized-adaptive-testing