Abstract
Three samples of newborns were measured on tactile sensitivity (using an aesthesiometer) and two indices of muscle strength (prone head reaction and grip strength). There was no sex difference found in tactile sensitivity. When the probabilities of all three samples were combined, sex differences were found in prone head reaction and grip strength, with boys showing greater strength than girls. Chubbiness and weight were negatively related to tactile sensitivity for boys in one of the three samples. Weight did not account for the sex differences in strength.
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