Reference : Stimulus-dependent modulation of visual neglect in a touch-screen cancellation task
Scientific journals : Article
Social & behavioral sciences, psychology : Treatment & clinical psychology
http://hdl.handle.net/10993/38137
Stimulus-dependent modulation of visual neglect in a touch-screen cancellation task
English
Keller, Ingo []
Volkening, Katharina []
Müller, Ruta mailto [University of Luxembourg > Faculty of Language and Literature, Humanities, Arts and Education (FLSHASE) > Integrative Research Unit: Social and Individual Development (INSIDE) >]
2015
Neuropsychology
American Psychological Association
29
3
417-420
Yes (verified by ORBilu)
International
0894-4105
Washington
DC
[en] Neglect ; Cancellation ; Feedback ; Perseverations
[en] Objective: Patients with left-sided neglect frequently show omissions and repetitive behavior on cancellation tests. Using a touch-screen-based cancellation task, we tested how visual feedback and distracters influence the number of omissions and perseverations. Method: Eighteen patients with left-sided visual neglect and 18 healthy controls performed four different cancellation tasks on an iPad touch screen: no feedback (the display did not change during the task), visual feedback (touched targets changed their color from black to green), visual feedback with distracters (20 distracters were evenly embedded in the display; detected targets changed their color from black to green), vanishing targets (touched targets disappeared from the screen). Results: Except for the condition with vanishing targets, neglect patients had significantly more omissions and perseverations than healthy controls in the remaining three subtests. Both conditions providing feedback by changing the target color showed the highest number of omissions. Erasure of targets nearly diminished omissions completely. The highest rate of perseverations was observed in the no-feedback condition. The implementation of distracters led to a moderate number of perseverations. Visual feedback without distracters and vanishing targets abolished perseverations nearly completely. Conclusions: Visual feedback and the presence of distracters aggravated hemispatial neglect. This finding is compatible with impaired disengagement from the ipsilesional side as an important factor of visual neglect. Improvement of cancellation behavior with vanishing targets could have therapeutic implications.
http://hdl.handle.net/10993/38137
10.1037/neu0000146

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