Table 2. Summary of results in number and calculation tasks (percent correct).

Tasks performed	Patient JR	Controls
Cardinal numerical tasks
Numerical quantity knowledge	100	100
Magnitude comparison	83.3	90
Number line	100	100
Composing the value of num with chips	100	100
Non-numerical quantity knowledge
Size judgement (of pictures and objects)	100	100
Quantity judgement with quantifiers	100	100
Calculation
Simple calculation
Addition	100	100
Subtraction	100	98.5
Multiplication	100	95.4
Division	n.t.	–
Multi-digit calculation
Addition	100	100
Subtraction	100	100
Multiplication	40	93.5
Division	n.t.	–
Ordinal numerical tasks
Counting
Forwards	100	100
Backwards by 1	100	100
Backwards from 21 to 1 by 2	100	100
Backwards from 21 to 1 by 3	90.9	99
Reciting non-number sequences
Letters	100	100
Days	100	100
What comes
Next	90	90
Before	100	100
Bisection test
Numbers	100	100
Letters/days	85.7	100
Other numerical tasks
Transcoding A–V/V–A	100; 100	98; 99
Reading Arabic numbers and number words	100; 100	97; 98
Writing Arabic numbers	80	100
Parity judgement	100	100

n.t. = Not tested; A = Arabic numbers; V = Verbal numbers.