Birth Order and Hand Preference in Chimpanzees (Pan troglodytes)- Implications for Pathological Models of Handedness in Humans

The effect of birth order on hand preference was assessed in a sample of 154 captive-born chimpanzees. Subjects were classified as first, middle, or latter born using 2 classification criteria based on their birth order. Hand preference was measured using a task that elicited coordinated bimanual actions. Significant birth-order effects were found for both classification […]