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Table 2 Arithmetic battery part 2: calculation - mean reaction time and mean error rate percentage

From: Attentional networks in developmental dyscalculia

 

Control

DD

Simple operations (RT)

61 sec

123 sec**

   Addition

1.35%

4%

   Subtraction

0%

5%

   Multiplication

2.5%

4.5%

   Division

5%

8.5%

Horizontal operations (RT)

13 sec

21 sec**

   Addition

6%

17.5%

   Subtraction

23%

23%

   Multiplication

6%

15%

   Division

2%

17%*

Vertical operations (RT)

625 sec

822 sec

   Addition

5%

18%**

   Subtraction

13%

32%**

   Multiplication

26%

23%

   Division

25%

42%

Decimals (RT)

238 sec

294 sec

   Addition

12%

16%

   Subtraction

28%

58%**

   Multiplication

31%

70%*

Fraction (RT)

547 sec

658 sec*

   Addition

13%

28%

   Subtraction

9%

25%*

   Multiplication

9%

21%

   Division

5%

14%

  1. Note. An asterisk indicates a significant difference between the performances of the developmental dyscalculia group and the control group. * p < 0.05, ** p < 0.01.