@article {2,
	title = {Deterioro de par{\'a}metros de los {\'\i}tems en tests adaptativos informatizados: estudio con eCAT [Item parameter drift in computerized adaptive testing: Study with eCAT]},
	journal = {Psicothema},
	volume = {22},
	number = {2},
	year = {2010},
	note = {Abad, Francisco JOlea, JulioAguado, DavidPonsoda, VicenteBarrada, Juan REnglish AbstractSpainPsicothemaPsicothema. 2010 May;22(2):340-7.},
	pages = {340-7},
	edition = {2010/04/29},
	abstract = {<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>
},
	keywords = {*Software, Educational Measurement/*methods/*statistics \& numerical data, Humans, Language},
	isbn = {0214-9915 (Print)0214-9915 (Linking)},
	author = {Abad, F. J. and Olea, J. and Aguado, D. and Ponsoda, V. and Barrada, J}
}
@article {298,
	title = {Tests informatizados y otros nuevos tipos de tests [Computerized and other new types of tests]},
	journal = {Papeles del Psic{\'o}logo},
	volume = {31},
	number = {1},
	year = {2010},
	pages = {94-107},
	abstract = {Recientemente 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 teor{\'\i}a de c{\'o}mo se responde a cada {\'\i}tem, 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 situaci{\'o}n de conflicto laboral, por ejemplo, con varias posibles soluciones, y ha de elegir la que le parece la mejor descripci{\'o}n de lo que el har{\'\i}a en esa situaci{\'o}n). El art{\'\i}culo comenta las caracter{\'\i}sticas, 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 generaci{\'o}n autom{\'a}tica de {\'\i}tems.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{\textquoteright}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.},
	author = {Olea, J. and Abad, F. J. and Barrada, J}
}
@article {15,
	title = {Comparison of methods for controlling maximum exposure rates in computerized adaptive testing},
	journal = {Psicothema},
	volume = {21},
	number = {2},
	year = {2009},
	note = {Barrada, Juan RamonAbad, Francisco JoseVeldkamp, Bernard PComparative StudySpainPsicothemaPsicothema. 2009 May;21(2):313-20.},
	month = {May},
	pages = {313-320},
	edition = {2009/05/01},
	abstract = {This paper has two objectives: (a) to provide a clear description of three methods for controlling the maximum exposure rate in computerized adaptive testing {\textemdash}the Symson-Hetter method, the restricted method, and the item-eligibility method{\textemdash} 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. Comparaci{\'o}n de m{\'e}todos para el control de tasa m{\'a}xima en tests adaptativos informatizados. Este art{\'\i}culo tiene dos objetivos: (a) ofrecer una descripci{\'o}n clara de tres m{\'e}todos para el control de la tasa m{\'a}xima en tests adaptativos informatizados, el m{\'e}todo Symson-Hetter, el m{\'e}todo restringido y el m{\'e}todode elegibilidad del {\'\i}tem, mostrando c{\'o}mo todos ellos pueden interpretarse como m{\'e}todos para la construcci{\'o}n del subbanco de {\'\i}tems variable, del cual cada examinado recibe los {\'\i}tems de su test; (b) se{\~n}alar las limitaciones te{\'o}ricas y emp{\'\i}ricas de cada m{\'e}todo y comparar sus resultados. Se obtienen resultados b{\'a}sicamente indistinguibles en tasa de solapamiento y RMSE con los tres m{\'e}todos (diferencias en la tercera posici{\'o}n decimal). El m{\'e}todo restringido es el mejor en el control de la tasa de exposici{\'o}n,seguido por el m{\'e}todo de elegibilidad del {\'\i}tem. El peor es el m{\'e}todo Sympson-Hetter. El m{\'e}todo restringido presenta un problema de solapamiento secuencial. Nuestra recomendaci{\'o}n ser{\'\i}a utilizar el m{\'e}todo de elegibilidad del {\'\i}tem, puesto que ahorra tiempo y satisface los objetivos de limitar la tasa m{\'a}xima de exposici{\'o}n.},
	keywords = {*Numerical Analysis, Computer-Assisted, Psychological Tests/*standards/*statistics \& numerical data},
	isbn = {0214-9915 (Print)0214-9915 (Linking)},
	author = {Barrada, J and Abad, F. J. and Veldkamp, B. P.}
}
@article {453,
	title = {Item selection rules in computerized adaptive testing: Accuracy and security},
	journal = {Methodology},
	volume = {5},
	year = {2009},
	note = {(PDF file, 445 KB)  },
	pages = {7-17},
	author = {Barrada, J and Olea, J. and Ponsoda, V. and Abad, F. J.}
}
@inbook {1731,
	title = {Test overlap rate and item exposure rate as indicators of test security in CATs},
	year = {2009},
	note = {PDF File, 261 K},
	address = {D. J. Weiss (Ed.), Proceedings of the 2009 GMAC Conference on Computerized Adaptive Testing.},
	author = {Barrada, J and Olea, J. and Ponsoda, V. and Abad, F. J.}
}
@article {454,
	title = {Incorporating randomness in the Fisher information for improving item-exposure control in CATs},
	journal = {British Journal of Mathematical and Statistical Psychology},
	volume = {61},
	year = {2008},
	pages = {493-513},
	author = {Barrada, J and Olea, J. and Ponsoda, V. and Abad, F. J.}
}
@article {17,
	title = {Rotating item banks versus restriction of maximum exposure rates in computerized adaptive testing},
	journal = {Spanish Journal of Psychology},
	volume = {11},
	number = {2},
	year = {2008},
	note = {Barrada, Juan RamonOlea, JulioAbad, Francisco JoseResearch Support, Non-U.S. Gov{\textquoteright}tSpainThe Spanish journal of psychologySpan J Psychol. 2008 Nov;11(2):618-25.},
	pages = {618-625},
	edition = {2008/11/08},
	abstract = {<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>
},
	keywords = {*Character, *Databases, *Software Design, Aptitude Tests/*statistics \& numerical data, Bias (Epidemiology), Computing Methodologies, Diagnosis, Computer-Assisted/*statistics \& numerical data, Educational Measurement/*statistics \& numerical data, Humans, Mathematical Computing, Psychometrics/statistics \& numerical data},
	isbn = {1138-7416},
	author = {Barrada, J and Olea, J. and Abad, F. J.}
}
@article {297,
	title = {Requerimientos, aplicaciones e investigaci{\'o}n en tests adaptativos informatizados [Requirements, applications, and investigation in computerized adaptive testing]},
	journal = {Apuntes de Psicologia},
	volume = {19},
	number = {1},
	year = {2001},
	pages = {11-28},
	abstract = {Summarizes the main requirements and applications of computerized adaptive testing (CAT) with emphasis on the differences between CAT and conventional computerized tests. Psychometric properties of estimations based on CAT, item selection strategies, and implementation software are described. Results of CAT studies in Spanish-speaking samples are described. Implications for developing a CAT measuring the English vocabulary of Spanish-speaking students are discussed. (PsycINFO Database Record (c) 2005 APA )},
	keywords = {Computer Assisted Testing, English as Second Language, Psychometrics computerized adaptive testing},
	author = {Olea D{\'\i}az, J. and Ponsoda Gil, V. and Revuelta Men{\'e}ndez, J. and Hontangas Beltr{\'a}n, P. and Abad, F. J.}
}
@article {203,
	title = {Los tests adaptativos informatizados en la frontera del siglo XXI: Una revisi{\'o}n [Computerized adaptive  tests at the turn of the 21st century: A review]},
	journal = {Metodolog{\'\i}a de las Ciencias del Comportamiento},
	volume = {2},
	number = {2},
	year = {2000},
	pages = {183-216},
	keywords = {computerized adaptive testing},
	isbn = {1575-9105},
	author = {Hontangas, P. and Ponsoda, V. and Olea, J. and Abad, F. J.}
}
@article {653,
	title = {Psychometric and psychological effects of review on computerized fixed and adaptive tests},
	journal = {Psicolgia},
	volume = {21},
	year = {2000},
	pages = {157-173},
	author = {Olea, J. and Revuelta, J. and Ximenez, M. C. and Abad, F. J.}
}
