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See detailComputer-assisted tomography for liquid imaging in trickle-flow columns
Toye, Dominique ULg; Marchot, Pierre ULg; Crine, Michel ULg et al

in Non-invasive Monitoring of Multiphase Flows (1996)

Detailed reference viewed: 9 (1 ULg)
See detailComputer-Based Analyses of Structures Exposed to Fire
Franssen, Jean-Marc ULg

Scientific conference (2000, March 23)

Detailed reference viewed: 13 (1 ULg)
See detailComputer-Based Analyses of Structures Exposed to Fire
Franssen, Jean-Marc ULg

Scientific conference (2000, March 14)

Detailed reference viewed: 2 (1 ULg)
Peer Reviewed
See detailA computer-based exploration of the lexical possibilities of intercomprehension: Finding German cognates of Dutch words
Möller, Robert ULg

in Zeevaert, Ludger; ten Thije, Jan (Eds.) Receptive Multilingualism and intercultural communication (2007)

Detailed reference viewed: 104 (4 ULg)
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See detailComputer-based monitoring of global cardiovascular dynamics during acute pulmonary embolism and septic shock in swine
Revie, JA; Stevenson, D; Chase, JG et al

in Critical Care (2012), 16 (Suppl 1)

Detailed reference viewed: 16 (3 ULg)
See detailComputer-generated holography: development of a software package for the Apple Macintosh
Roose, Stéphane ULg

Master of advanced studies dissertation (1989)

Detailed reference viewed: 9 (0 ULg)
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See detailA Computer-Vision Based Precision Seed Drill Guidance Assistance
Leemans, Vincent ULg; Destain, Marie-France ULg

in Computers and Electronics In Agriculture (2007), 59(1-2),

This paper presents a control mechanism aiming to position seed drills relative to the previous lines, while sowing. The position was measured by a machine vision system and used in a feedback control ... [more ▼]

This paper presents a control mechanism aiming to position seed drills relative to the previous lines, while sowing. The position was measured by a machine vision system and used in a feedback control loop. An articulated mechanism was used to ensure the lateral displacement of the drill relative to the tractor. The behaviour of the whole outfit was studied during several field tests. The standard deviation of the error, measured as the difference between the observed inter-row distance and its set value, was 23 mm and its range was less than 100 mm, which was sufficient to fulfil the requirements of the application. Sources of systematic errors were also identified as linked to the geometric considerations. Their correction requires an accurate mounting of the camera, which may be possible for a serial montage. [less ▲]

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See detailComputergestützte Förderung der mündlichen Leistung im Fremdsprachenunterricht - Die @lter Fremdsprachkurse an der Universität Lüttich (ULg), Belgien
Thonard, Audrey ULg; Jérôme, Françoise ULg; Badir, Yasmine ULg et al

Poster (2014, October 30)

The poster présents the implementation of voice tools in the service of foreign language learning at the University of Liège. Oral skills (comprehension and production) are trained online in autonomy and ... [more ▼]

The poster présents the implementation of voice tools in the service of foreign language learning at the University of Liège. Oral skills (comprehension and production) are trained online in autonomy and with instructors' interventions. The setting also provides facilities for oral feedbacks. [less ▲]

Detailed reference viewed: 34 (6 ULg)
Peer Reviewed
See detailComputerised method to measure asymetrical articular compression on digitised X-rays
Caudron, I; Henrotin, Yves ULg; Reginster, Jean-Yves ULg et al

in Rivista SIDI Proceedings 5th WEVA Congress (1st part) (1998)

Detailed reference viewed: 9 (0 ULg)
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See detailComputerised Tailored Testing: Structured and calibrated Item for Summative and Formative Evaluation
Leclercq, Dieudonné ULg

in European Journal of Education (1980), 15(3), 251-260

Advancements in educational testing, especially in the computerized construction of tests from item banks, are outlined and explained. It is suggested that these methods open the door to more ... [more ▼]

Advancements in educational testing, especially in the computerized construction of tests from item banks, are outlined and explained. It is suggested that these methods open the door to more individualized and more formative type of testing. [less ▲]

Detailed reference viewed: 27 (1 ULg)
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See detailComputerized adaptive and multi-stage testing with R
Yan, Duanli; Magis, David ULg

Conference (2016, February 19)

Computerized Adaptive Testing (CAT) has greatly improved the accuracy and efficiency of psychological testing for decades. Multistage Testing (MST) has received much of attention recently. MST is similar ... [more ▼]

Computerized Adaptive Testing (CAT) has greatly improved the accuracy and efficiency of psychological testing for decades. Multistage Testing (MST) has received much of attention recently. MST is similar to CAT such that it allows the adaptation of the difficulty of the test to the level of ability of a test taker. Specifically, in MST, items are interactively selected for each test taker, but rather than selecting individual items, groups of items are selected and the test is built in stages. Over the last decade, researchers have investigated ways for an MST to incorporate most of the advantages from CAT and linear testing, while minimize their disadvantages. These features include testing efficiency and accuracy, greater control of test content, more robust item review, as well as simplified test assembly and administration. Therefore, MST can be an effective compromise between CAT and linear testing, embedding features and benefits from both designs. Thus, MST becomes of more and more interest to researchers and practitioners as technology advances. This presentation will first provide a general overview of a multistage test (MST) design and its important concepts and processes. It will then present the latest development on CAT and MST using R, the mstR package. The presentation will also illustrate how to simulate MST administrations using mstR package, and discuss some practical issues and considerations for MST from design to applications. [less ▲]

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See detailComputerized Adaptive Testing
Braeken, Johan; Magis, David ULg; Stillwell, David

Scientific conference (2016, April 25)

Why ask a person to answer a problem item, when you a priori know they won’t be able to solve it? It is a waste of time and resources, and you won’t gain any new information; this is both inefficient and ... [more ▼]

Why ask a person to answer a problem item, when you a priori know they won’t be able to solve it? It is a waste of time and resources, and you won’t gain any new information; this is both inefficient and ineffective. In contrast, computerized adaptive testing (CAT) is based on the principle that more information can be gained when one tailors the test towards the level of the person being tested. Computational and statistical techniques from item response theory (IRT) and decision theory are combined to implement a test that can behave interactively during the test process and adapts towards the level of the person being tested.The implementation of such a CAT relies on an iterative sequential algorithm that searches the pool of available items (a so-called item bank) for the optimal item to administer based on the current estimate of the person’s level (and optional external constraints). The subsequent response on this item provides new information to update the person’s proficiency estimate. This selection-responding-updating process continues until specified stop criteria have been reached. The consequence of such an adaptive test administration is that you get an individualized tailored test that is more efficient and more effective. Because you have less of a mismatch between the level of the test and the level of the test taker, there is a lesser burden for the latter and a higher precision for the former, and this with fewer items than a traditional fixed item-set test format. Furthermore, because it is computerized and sequential, test performance can be continuously monitored and reported directly after test completion. Item response models come into play to ensure comparable scores of these individual tailored tests by putting them on the same measurement scale and to precalibrate,the psychometric parameters of the items that are part of the item bank on which the sequential iterative algorithm operates. The workshop intends to tackle issues encountered during the setup of a computerized adaptive test, starting from the design towards the actual delivery of a CAT. [less ▲]

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See detailComputerized adaptive testing
Magis, David ULg; Mahalingam, Vaishali

in Da Silva, Marjorie Cristina Rocha; Bartholomeu, Daniel; Vendramini, Claudette Maria Medeiros (Eds.) et al Applicações de Métodos Estatísticos Avançadaos à Avaliação Psicológica e Educacional (2015)

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See detailComputerized adaptive testing with R: Recent updates of the package catR
Magis, David ULg; Barrada, Juan Ramon

in Journal of Statistical Software (in press)

The purpose of this paper is to list the recent updates of the R package catR. This package allows for generating response patterns under a computerized adaptive testing (CAT) framework with underlying ... [more ▼]

The purpose of this paper is to list the recent updates of the R package catR. This package allows for generating response patterns under a computerized adaptive testing (CAT) framework with underlying item response theory (IRT) models. Among the most important updates, well-known polytomous IRT models are now supported by catR; several item selection rules have been added; and it is now possible to perform post-hoc simulations. Some functions were also rewritten or withdrawn to improve the usefulness and performances of the package. [less ▲]

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See detailComputerized assessment of cognition in schizophrenia: promises and pitfalls of CANTAB.
Levaux, Marie-Noëlle ULg; Potvin, Stephane; Sepehry, Amir Ali et al

in European Psychiatry (2007), 22(2), 104-15

OBJECTIVE: Over the last decade, the Cambridge Neuropsychological Test Automated Battery (CANTAB), which comprises visuo-spatial tasks, has been utilized in cognitive studies of schizophrenia. A clear ... [more ▼]

OBJECTIVE: Over the last decade, the Cambridge Neuropsychological Test Automated Battery (CANTAB), which comprises visuo-spatial tasks, has been utilized in cognitive studies of schizophrenia. A clear approach concerning the usage of CANTAB for the appraisal of neurocognitive dysfunction in schizophrenia is currently lacking. METHOD: In this paper, we have first reviewed the overall applications of CANTAB and then evaluated methodological strengths and weaknesses of CANTAB as a neurocognitive battery for schizophrenia. We carried out a systematic search and assessment of studies where CANTAB was utilized to measure cognitive function in schizophrenia. We have also attempted to quantify the available data and perform a meta-analysis, but this approach turned out to be still premature. RESULTS: CANTAB has enabled researchers to highlight significant deficits affecting broad cognitive domains in schizophrenia, such as working memory, decision-making, attention, executive functions and visual memory. So far, the most consistent deficit observed with CANTAB testing has been attentional set-shifting, suggestive of fronto-striatal dysfunctions. In addition, preliminary evidence points towards the potential use of CANTAB to identify cognitive predictors of psychosocial functioning, to describe the relationships between symptoms and cognition, and to measure the impact of pharmacological agents on cognitive functioning. CONCLUSION: CANTAB has been used successfully to highlight the range of visuo-spatial cognitive deficits in schizophrenia, producing similar results to those obtained with some traditional neuropsychological tests. Further studies validating the use of CANTAB following the standard set by Measurement And Treatment Research to Improve Cognition in Schizophrenia (MATRICS) are warranted. [less ▲]

Detailed reference viewed: 74 (2 ULg)
See detailA computerized method adapted for pulmonary function testing in unsedated horses
Lekeux, Pierre ULg

in Deegen, E.; Beadle, R. E. (Eds.) Lung Function and Respiratory Diseases in the Horse (1985)

Detailed reference viewed: 8 (1 ULg)
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See detailA computerized open learning environment to study intrapersonal variations in learning styles : DELIN
Leclercq, Dieudonné ULg; Pierret, D.

in Estes, N. (Ed.) Proceedings of the 6th International Conference on Technology and Education (ICTE), Orlando, Florida, March 21-23, 1989 (1989, March)

Several studies have been devoted to interpersonal differences in so-called "cognitive styles" (Kagan & Kogan), 1970; WItking & Goodenough, 1977; Pask, 1976, etc.). Pask himself has emphasised the notion ... [more ▼]

Several studies have been devoted to interpersonal differences in so-called "cognitive styles" (Kagan & Kogan), 1970; WItking & Goodenough, 1977; Pask, 1976, etc.). Pask himself has emphasised the notion of versatility, i.e. the individual's capacity to switch from a strategy to an other, according to changes in conditions, constrains, etc.In order to respect both the interpersonal and intrapersonal variations in learning strategies, we have developed a software of the hypermedia type called DELIN (from the French DELINEARISE, that means non linear. [less ▲]

Detailed reference viewed: 71 (6 ULg)