A Binomial test was performed for each individual and for each specific motor pattern considering a 0.5 chance level. Individuals with:

• significant + Z-scores (Z ≥ 1.96) → Right-lateralized.
• significant - Z-scores (Z ≤ -1.96) → Left-lateralized.
• non significant Z-scores (-1.96 < Z < 1.96) → No limb/side bias.

Binomial tests were performed for each of the studied motor patterns to compare:

• Nº of right-lateralized individuals vs nº of left-lateralized individuals.
• Nº of non-lateralized individuals vs nº of lateralized individuals. 

Mann-Whitney U tests and Kruskall-Wallis tests were performed to compare:

• Z-scores between group categories (effects on the direction).
• Absolute value of Z-scores between group categories (effects on the strength).