Table 1.
Mean and standard deviations for both groups in age and IQ.
Fig 1.
Example of stimuli used in the non-symbolic dot comparison task.
Fig 2.
Exact enumeration task: Schema of timing and structure.
Fig 3.
Large numerosity task: Weber fraction in children with DD and controls.
Psychometric functions relating the percentage of trials in which N2 was reported as more numerous than N1 as a function of the logarithm of the ratio between N2 and N1. Squares N1 = 16; diamonds N1 = 32. The fitted curves are derived from the equations described in Piazza et al. [63].
Fig 4.
Exact enumeration task: Mean RTs in DD and controls.
Error bars represent the standard error of the mean.
Fig 5.
Exact enumeration task: Mean error rate for DD and controls.
Error bars represent the standard error of the mean.
Fig 6.
Exact enumeration task: Mean response provided by DD and controls.
Error bars represent the standard error of the mean.
Fig 7.
Visuo-spatial short-term memory: accuracy for each numerosity for DD and controls.
Error bars represent the standard error of the mean.