Exact(2)
Evidently, then, something else was needed to push early humans from a lateral preference in general to the extremely high levels of right-handedness we see today.
It was only when forced to assume an upright stance that a lateral preference emerged – although individual chimps in the study were equally likely to be left-handed as right-handed.
Similar(58)
They found that two-thirds of the tools were cut from the left sides of leaves--indicating a clear lateral preference, the team says.
Handedness was assessed using the Coren, Porac, and Duncan Laterality Questionnaire (CPD; [68]), a 13-item questionnaire that assesses lateral preference for the hand, foot, eye, and ear.
Individuals may show lateral preference when grasping with their trunks: some prefer to twist them to the left, others to the right.
An ANOVA on laterality quotients proved no sex difference in the degree of lateral preference between men (0.81, SE = 0.03) and women (0.79, SE = 0.03).
When participants were divided according to their lateral preference for the specific action imagined (using scissors, using a toothbrush, or using a spoon) as declared in the handedness questionnaire rather than total laterality score obtained by considering all items, results were almost identical.
We define the term leg preference derived from lateral preference as representative of the choice for one side of the body to perform a motor action.
The hand and foot dominance of participants was assessed with the Lateral Preference Inventory of Coren (1993).
However, this choice would have entailed the loss of 30 participants who indicated no lateral preference for the particular action imagined, so we decided to report only the results of analyses employing total laterality score as the criterion for defining handedness.
The dominant hand will be determined according to the lateral preference inventory [ 81].
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