Behavioral and Brain Sciences

Short Communication

Myths of first cause and asymmetries in human evolution

Marian Annett a1

a1 School of Psychology, University of Leicester, Leicester LE1 7RH, United Kingdom


The causes of asymmetries for handedness and cerebral speech are of scientific interest, but is it sensible to try to determine which of these came first? I argue that (1) first causes belong to mythology, not science; (2) much of the cited evidence is weak; and (3) the treatment of individual differences is inadequate in comparison with the right shift theory.