Figure 1From: Individual differences in non-symbolic numerical abilities predict mathematical achievements but contradict ATOMExperimental procedure for non-symbolic magnitude estimation. The participants initially saw a fixation cross, and then two stimuli differing in duration (a), area (b), or number (c) appeared in sequence. The participants were required to estimate which tone had lasted longer (a), which line was longer (b), and which group of dots was more numerous (c).Back to article page