Means and standard errors of the mean (SEM; in brackets) for age, educational level, math ability, math anxiety, trait and state anxiety and frequencies for gender and handedness for the LMA and the HMA groups.

Note: LMA: low math-anxious; HMA: high math-anxious; Gender: number of women; Handedness: number of right-handed individuals; Education: number of years of formal education counting from 6 years-old forward. Ability: proportion of correctly solved additions with respect to the total of additions solved in the Simple arithmetic test. sMARS: shortened Math Anxiety Rating Scale; STAI-T: Trait anxiety subscale from the STAI; STAI-S: State anxiety subscale from the STAI.