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. Author manuscript; available in PMC: 2013 Nov 27.
Published in final edited form as: J Comp Psychol. 2013 Jan 28;127(4):10.1037/a0031071. doi: 10.1037/a0031071

Table 3.

Mean HI and Distribution of Handedness for Each Measure

# L # R Mean HI SE
Tool use 146 154 .013 .031
Simple reaching 137 167 .037 .023
Tube task 120 180 .128 .032
Manual gestures 86 214 .268 .027

Note. Handedness classification was based on the sign of the HI score. Subjects with positive HI scores were classified as right and subjects with negative HI scores or a score of 0 (this was rare) were classified as left. HI = handedness index; SE = standard error.