Left, Right, Hand and Brain: The Right Shift Theory

analysis Annett associated asymmetries australopithecines bias biased bilateral birthday samples brain brainedness cerebral hemispheres cerebral specialisation cerebral speech Chapter chimpanzees classified comparison consistent cortex depend dextral dichotic listening distribution of L-R dyslexia dyslexics dysphasia dysphasics evidence expected eye preference factor families females findings function genetic genotype hand preference handedness handedness groups Hécaen heterozygote human hypothesis incidence of left-handedness Kilshaw L-R differences L-R means L-R skill Ladinos language laterality left hemisphere left-handed relatives left-handed writers left-handers lesions males Mean SD mixed mixed-handers motor movements nonpreferred hand normal distribution numbers observed pairs patients patterns peg-moving percentages planum temporale population Porac possible predicted preferred hand proportion of left-handers questionnaire reported right shift right-handers right-hemisphere right-hemisphere speech right-sided rs+ gene rs++ scores Section sex differences side sinistral situs inversus species split-brain studies subjects suggested Table tasks theory threshold twins variability verbal visual writing