TY - JOUR AU - Beale, I. L. AB - Defined 2 tests of the ability to distinguish left from right: mirror-image stimulus discrimination and left-right response differentiation. A perfectly bilaterally symmetrical machine could perform neither test. Evidence is reviewed that animals and men find both tests difficult, especially the lst. It is suggested that interhemispheric fiber systems, i.e., the corpus callosum, act to "symmetrize" memory traces and thus preserve structural symmetry. This may partly explain findings of mirror-image reversal accompanying interhemispheric transfer. Evidence is also described which suggests that animals may sometimes solve problems of mirror-image stimulus discrimination by adopting asymmetrical postures or by making asymmetrical responses in scanning the stimuli. (63 ref.) TI - Bilateral symmetry and behavior JF - Psychological Review DO - 10.1037/h0029805 DA - 1970-09-01 UR - https://www.deepdyve.com/lp/american-psychological-association/bilateral-symmetry-and-behavior-1zLpLMvqLM SP - 451 EP - 464 VL - 77 IS - 5 DP - DeepDyve ER -