Supplemental Material for Numerical Magnitude Understanding in Kindergartners: A Specific and Sensitive Predictor of Later Mathematical Difficulties?

2020 ◽  
Keyword(s):  
Numerical Magnitude ◽  
Mathematical Difficulties

scholarly journals Nonsymbolic and Symbolic Numerical Magnitude Processing in the Brazilian Children with Mathematics Difficulties

2021 ◽  
Vol 15 (4) ◽  
pp. 524-532
Author(s):  
Isabella Starling-Alves ◽  
Annelise Júlio-Costa ◽  
Ricardo José de Moura ◽  
Vitor Geraldi Haase
Keyword(s):  
School Age Children ◽  
Numerical Magnitude ◽  
Comparison Task ◽  
Arithmetic Task ◽  
Magnitude Comparison ◽  
Magnitude Processing ◽  
Mathematics Difficulties ◽  
Mathematical Difficulties ◽  
Low Performance ◽  
The Relationship

ABSTRACT It is still debated if the main deficit in mathematical difficulties (MD) is nonsymbolic or symbolic numerical magnitude processing. Objectives: In the present study, our main goal was to investigate nonsymbolic and symbolic numerical magnitude processing in MD and the relationship between these abilities and arithmetic. Methods: The Brazilian school-age children with MD completed a nonsymbolic and a symbolic numerical magnitude comparison task and an arithmetic task. We compared their performance with a group of children with typical achievement (TA) and investigated the association between numerical magnitude processing and arithmetic with a series of regression analyses. Results: Results indicated that children with MD had low performance in the nonsymbolic numerical magnitude comparison task. Performance in both nonsymbolic and symbolic numerical magnitude comparison tasks predicted arithmetic abilities in children with TA, but not in children with MD. Conclusions: These results indicate that children with MD have difficulties in nonsymbolic numerical magnitude processing, and do not engage basic numerical magnitude representations to solve arithmetic.

The Flip Side of the Auditory Spatial Selection Benefit

2015 ◽  
Vol 62 (1) ◽  
pp. 66-74 ◽  
Author(s):  
Iring Koch ◽  
Vera Lawo
Keyword(s):  
Task Switching ◽  
Auditory Task ◽  
Numerical Magnitude ◽  
Attention Shifting ◽  
Gender Selection ◽  
Spatial Selection ◽  
Number Words ◽  
Switch Costs ◽  
Mixing Costs ◽  
Experimental Group

In cued auditory task switching, one of two dichotically presented number words, spoken by a female and a male, had to be judged according to its numerical magnitude. One experimental group selected targets by speaker gender and another group by ear of presentation. In mixed-task blocks, the target-defining feature (male/female vs. left/right) was cued prior to each trial, but in pure blocks it remained constant. Compared to selection by gender, selection by ear led to better performance in pure blocks than in mixed blocks, resulting in larger “global” mixing costs for ear-based selection. Selection by ear also led to larger “local” switch costs in mixed blocks, but this finding was partially mediated by differential cue-repetition benefits. Together, the data suggest that requirements of attention shifting diminish the auditory spatial selection benefit.

The Effects of Numerical Magnitude Size and Color Saturation on Perceived Interval Duration

2013 ◽  
Author(s):  
Doug Alards-Tomalin ◽  
Jason P. Leboe-McGowan ◽  
Joshua Shaw ◽  
Launa C. Leboe-McGowan
Keyword(s):  
Numerical Magnitude ◽  
Interval Duration ◽  
Color Saturation
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