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(Personen: "Lonnemann," und "Jan")
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Rehabilitation of arithmetic fact retrieval via extensive practice. A combined fMRI and behavioural […]
Zaunmüller, Luisa; Domahs, Frank; Dressel, Katharina; Lonnemann, Jan; Klein, Elise; […]
Journal Article
| In: Neuropsychological Rehabilitation | 2009
8161 Endnote
Author(s):
Zaunmüller, Luisa; Domahs, Frank; Dressel, Katharina; Lonnemann, Jan; Klein, Elise; Ischebeck, Anja; Willmes, Klaus
Title:
Rehabilitation of arithmetic fact retrieval via extensive practice. A combined fMRI and behavioural case-study
In:
Neuropsychological Rehabilitation, 19 (2009) 3, S. 422-443
Publication Type:
3a. Beiträge in begutachteten Zeitschriften; Aufsatz (keine besondere Kategorie)
Language:
Englisch
Keywords:
Arithmetik; Kognitive Prozesse; Gehirnschädigung; Therapie; Übung; Training; Wirkung; Gehirn; Messung; Fallstudie; Neuropsychologie; Deutschland
Abstract (english):
The present study investigates the effects of a training of arithmetic fact retrieval in a patient suffering from particular difficulties with multiplication facts. Over a period of four weeks simple multiplication facts were trained extensively. The outcome of the training was assessed behaviourally and changes in cerebral activation patterns were investigated using fMRI. The training led to a change in calculation strategies: Prior to training, the patient used predominantly time-consuming back-up strategies, after training he relied increasingly on the direct retrieval of arithmetic facts from long- term memory. Regarding the fMRI results, prefrontal activations were observed for untrained problems, which can be attributed to the application of back-up strategies strongly relying on fronto-executive functions. Interestingly, significant foci of activation for both trained and untrained items were found in the angular gyrus of the right hemisphere, which, however, differed in their exact localisation. For the trained condition, activations were observed in anterior parts of the angular gyrus which may be related to the training-based automatisation in fact retrieval. Activations in the untrained condition were found in a more posterior portion of the angular gyrus, that might be attributable to one of the patient's back-up strategies, namely to recite a whole multiplication row to get to the correct answer. (DIPF/Orig.)
DIPF-Departments:
Bildung und Entwicklung
[Testbesprechung] Schuhfried, Gernot: Daueraufmerksamkeit (DAUF) aus dem Wiener Testsystem (WTS)
Lonnemann, Jan
Book Chapter
| Aus: Schellig, Dieter; Drechsler, Renate; Heinemann, Dörthe; Sturm, Walter (Hrsg.): Handbuch neuropsychologischer Testverfahren: 1. Aufmerksamkeit, Gedächtnis und exekutive Funktionen | Göttingen: Hogrefe | 2009
8155 Endnote
Author(s):
Lonnemann, Jan
Title:
[Testbesprechung] Schuhfried, Gernot: Daueraufmerksamkeit (DAUF) aus dem Wiener Testsystem (WTS)
In:
Schellig, Dieter; Drechsler, Renate; Heinemann, Dörthe; Sturm, Walter (Hrsg.): Handbuch neuropsychologischer Testverfahren: 1. Aufmerksamkeit, Gedächtnis und exekutive Funktionen, Göttingen: Hogrefe, 2009 , S. 67-72
Publication Type:
4. Beiträge in Sammelwerken; Lexika/Enzyklopädie o.ä.
Language:
Deutsch
Keywords:
Aufmerksamkeit; Konzentrationsfähigkeit; Visuelle Wahrnehmung; Test; Diagnostik; Testkonstruktion; Messung; Neuropsychologie; Rezension
Abstract:
In diesem Beitrag wird der Daueraufmerksamkeitstest (DAUF) aus dem Wiener Testsystem (WTS) rezensiert. Nach einer zusammenfassenden Testbeschreibung wird auf die Testkonstruktion, die Normierung, die Gütekriterien sowie auf neuropsychologische Aspekte eingegangen. Insgesamt wird der DAUF als guter Test zur Messung der visuellen Daueraufmerksamkeit bewertet, der jedoch für Probanden mit motorischen Störungen oder Beeinträchtigung der Sehfähigkeit weniger gut geeignet ist.(DIPF/Autor)
DIPF-Departments:
Bildung und Entwicklung
Spatial representations of numbers in children and their connection with calculation abilities
Lonnemann, Jan; Krinzinger, Helga; Knops, André; Willmes, Klaus
Journal Article
| In: Cortex | 2008
8709 Endnote
Author(s):
Lonnemann, Jan; Krinzinger, Helga; Knops, André; Willmes, Klaus
Title:
Spatial representations of numbers in children and their connection with calculation abilities
In:
Cortex, 44 (2008) 4, S. 420-428
Publication Type:
3a. Beiträge in begutachteten Zeitschriften; Aufsatz (keine besondere Kategorie)
Language:
Englisch
Keywords:
Kompetenz; Rechnen; Zahlbegriff
Abstract (english):
Evidence for a connection between number and space processing comes from behavioural, patient, and brain imaging data, but only a few studies have addressed this issue in children. We asked children (n = 118) at the age of 8-9 years to decide which one of the two numerical distances in a visually presented number triplet was numerically larger. Numerical and spatial distances were manipulated independently, resulting in congruent, neutral, and incongruent conditions. The spatial distances between the numbers clearly affected the comparison of numerical distances: reactions times were faster and error rates smaller for congruent than for incongruent trials. These findings are in line with the assumption of a spatial layout of mental number representations in third graders. Correlations between the size of the congruity effect and calculation abilities were found to be differently marked for girls and boys: a positive correlation was found for boys, while a marginally negative correlation was obtained for girls.
DIPF-Departments:
Bildung und Entwicklung
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