Writing hand position, birth stress, and familial factors

The incidence of birth stress was found to be slightly lower in individuals writing with an inverted hand position than in those writing with a normal position, a result in the opposite direction to that reported by Searleman, Porac, and Coren (1982). A familial study suggested that an inverted writing hand position was primarily related to maternal (but not paternal) writing hand position, suggesting a modeling or imitative origin, rather than a genetic basis for writing position.