scholarly journals Developmental Dyscalculia: Nosological Status and Cognitive Underpinnings

2020 ◽  
Author(s):  
Ricardo Moura ◽  
Suzane Garcia ◽  
Júlia Beatriz Lopes-Silva
Keyword(s):  
Developmental Dyscalculia

scholarly journals Developmental dyscalculia: a dysconnection syndrome?

2013 ◽  
Author(s):  
Karin Kucian ◽  
Simone Schwizer Ashkenazi ◽  
Jürgen Hänggi ◽  
Stephanie Rotzer ◽  
Lutz Jäncke ◽  
...  
Keyword(s):  
Developmental Dyscalculia

Nonsymbolic-Magnitude Deficit in Adults With Developmental Dyscalculia: Evidence of Impaired Size Discrimination but Intact Size Constancy

2021 ◽  
pp. 095679762199520
Author(s):  
Nirit Fooks ◽  
Bat-Sheva Hadad ◽  
Orly Rubinsten
Keyword(s):  
Size Constancy ◽  
Size Discrimination ◽  
Depth Cues ◽  
Developmental Dyscalculia ◽  
Core Deficit ◽  
Depth Ordering

Although researchers have debated whether a core deficit of nonsymbolic representation of magnitude underlies developmental dyscalculia (DD), research has mostly focused on numerosity processing. We probed the possibility of a general magnitude deficit in individuals with DD and asked whether sensitivity to size varied in contexts of depth ordering and size constancy. We measured full psychometric functions in size-discrimination tasks in 12 participants with DD and 13 control participants. Results showed that although people with DD exhibited veridical perceived magnitude, their sensitivity to size was clearly impaired. In contrast, when objects were embedded in depth cues allowing size-constancy computations, participants with DD demonstrated typical sensitivity to size. These results demonstrate a deficit in the perceptual resolutions of magnitude in DD. At the same time, the finding of an intact size constancy suggests that when magnitude perception is facilitated by implicit mandatory computations of size constancy, this deficit is no longer evident.

scholarly journals Stealth Assessment in ITS - A Study for Developmental Dyscalculia

2016 ◽  
pp. 79-89
Author(s):  
Severin Klingler ◽  
Tanja Käser ◽  
Alberto-Giovanni Busetto ◽  
Barbara Solenthaler ◽  
Juliane Kohn ◽  
...  
Keyword(s):  
Developmental Dyscalculia ◽  
Stealth Assessment
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