Grouping strategies in number estimation extend the subitizing range

<p>In the calculation folder: each file contains a matrix called &ldquo;MATR&rdquo;. Each row of the matrix &ldquo;MATR&rdquo; is a trial.&nbsp;</p> <p>The columns contain the following information:</p> <p>1^st: Number of trial</p> <p>2^{nd: Subject response}</p> <p>4^th: Response time</p> <p>5^th: first number&nbsp;</p> <p>6^th: math symbol (1=*; 2= +; 3= &ndash;)</p> <p>7^th: second number&nbsp;</p> <p>8^th: third number&nbsp;</p> <p>&nbsp;</p> <p>In the calculation folder: each file contains a matrix called &ldquo;matr&rdquo;. Each row of the matrix &ldquo;matr&rdquo; is a trial.&nbsp;</p> <p>The columns contain the following information:</p> <p>1^st: subject response in the numerosity task</p> <p>2^nd: the presented numerosity&nbsp;</p> <p>3^rd: subject response in the numerosity task</p> <p>4^th: zero</p> <p>5^th: stimulus duration</p> <p>6^th: Response time in the numerosity task</p> <p>7^th: Grouped (1) or random (2) presentation&nbsp;</p> <p>8^th: 1</p> <p>9^th: 1</p> <p>10^th: Number of items of the upper-left quadrant</p> <p>11^th: Number of items of the lower-left quadrant</p> <p>12^th: Number of items of the upper-right quadrant</p> <p>13^th: Number of items of the lower - right quadrant</p> <p>14^th: odd shape presented (1=diamond; 2=triangle; 3=circle)</p> <p>15^th: subject response in the shape task</p> <p>16^th: 0.2 in the single task response time in the shape task when dual task</p> <p>17^th: single (0) or dual (1) task</p> <p>18^th: time stimulus on</p> <p>19^th: time stimulus off</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p>