Statistiques appliquées aux études de cas unique : méthodes usuelles et alternatives

Atzeni, Thierry

doi:10.3917/rne.014.0343

Cited by 3 publications

(2 citation statements)

References 36 publications

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“…One approach is to convert the patient's score to a z score based on the mean and the standard deviation of the control sample. The crucial problem with this is that it treats the control sample as if it was a population and then treats the sample statistics as population parameters (see Atzeni, 2009). When the size of the control sample is large these parameters converge, but when the size of the control sample is small this approach leads to an inflation of Type I error and a risk of overestimating the abnormality of a patient's score.…”

Section: Single-case Studiesmentioning

confidence: 99%

Vocabulary skills are well developed in university students with dyslexia: Evidence from multiple case studies

Cavalli

Casalis

Ahmadi

et al. 2016

Research in Developmental Disabilities

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Most studies in adults with developmental dyslexia have focused on identifying the deficits responsible for their persistent reading difficulties, but little is known on how these readers manage the intensive exposure to written language required to obtain a university degree. The main objective of this study was to identify certain skills, and specifically vocabulary skills, that French university students with dyslexia have developed and that may contribute to their literacy skills. We tested 20 university students with dyslexia and 20 normal readers (matched on chronological age, gender, nonverbal IQ, and level of education) in reading, phonological, vocabulary breadth (number of known words), and vocabulary depth (accuracy and precision) tasks. In comparing vocabulary measures, we used both Rasch model and single case study methodologies. Results on reading and phonological tasks confirmed the persistence of deficits in written word recognition and phonological skills. However, using the Rasch model we found that the two groups performed at the same level in the vocabulary breadth task, whereas dyslexics systematically outperformed their chronological age controls in the vocabulary depth task. These results are supplemented by multiple case studies. The vocabulary skills of French university students with dyslexia are well developed. Possible interpretations of these results are discussed.

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Section: Single-case Studiesmentioning

confidence: 99%

Vocabulary skills are well developed in university students with dyslexia: Evidence from multiple case studies

Cavalli

Casalis

Ahmadi

et al. 2016

Research in Developmental Disabilities

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“…In agreement with clinical practice, an IQ score under 70 or a z-score under −1.65 was considered significantly impaired. 25 …”

Section: Study Descriptionmentioning

confidence: 99%

Cognitive outcome after left functional hemispherectomy on dominant hemisphere in patients with Rasmussen encephalitis: beyond the myth of aphasia. Patient series

Borne

Perrone‐Bertolotti

Jambaqué

et al. 2022

Journal of Neurosurgery: Case Lessons

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BACKGROUND Rasmussen encephalitis is a rare chronic neurological pathology frequently treated with functional hemispherectomy (or hemispherotomy). This surgical procedure frees patients of their severe epilepsy associated with the disease but may induce cognitive disorders and notably language alterations after disconnection of the left hemisphere. OBSERVATIONS The authors describe longitudinally 3 cases of female patients with Rasmussen encephalitis who underwent left hemispherotomy in childhood and benefited from a favorable cognitive outcome. In the first patient, the hemispherotomy occurred at a young age, and the recovery of language and cognitive abilities was rapid and efficient. The second patient benefited from the surgery later in childhood. In addition, she presented a reorganization of language and memory functions that seem to have been at the expense of nonverbal ones. The third patient was a teenager during surgery. She benefited from a more partial cognitive recovery with persistent disorders several years after the surgery. LESSONS Recovery of cognitive functions, including language, occurs after left hemispherotomy, even when performed late in childhood. Therefore, the surgery should be considered as early as possible to promote intercognitive reorganization.

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The Role of Experimentation in the Daily Practice of Neuropsychological Assessment: Advantages and Disadvantages

Atzeni

2012

Applied Neuropsychology: Adult

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In some situations, satisfactory neuropsychological assessment of a patient is not possible using conventional methods of investigation such as standardized tests, clinical interview, or neurological methods of examination. This is the case when interfering variables or complex cases in which there is a mixture of impaired function preclude the use of some standardized tests. Under certain conditions, the use of experimentation (i.e., experimental designs) can be of interest and can complement classical neuropsychological assessment. Even if it entails a number of constraints, experimentation may lead to a better understanding of the abilities of a patient and make it possible to set up a more effective program of rehabilitation.

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Statistiques appliquées aux études de cas unique : méthodes usuelles et alternatives

Cited by 3 publications

References 36 publications

Vocabulary skills are well developed in university students with dyslexia: Evidence from multiple case studies

Vocabulary skills are well developed in university students with dyslexia: Evidence from multiple case studies

Cognitive outcome after left functional hemispherectomy on dominant hemisphere in patients with Rasmussen encephalitis: beyond the myth of aphasia. Patient series

The Role of Experimentation in the Daily Practice of Neuropsychological Assessment: Advantages and Disadvantages

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