12. Although qualitative variance among nerve energies was never rigidly disproved, the doctrine was generally abandoned in favor of the opposing view, namely, that nerve impulses are essentially homogeneous in quality and are transmitted as common currency throughout the nervous system.

　　13. Other experiment revealed slight variations in the size, number, arrangement, and interconnection of the nerve cells, but as far as psycho-neural correlations was concerned, the obvious similarities of these sensory fields to each other seemed much more remarkable than any of the minute differences.

　　14. Although some experiments show that, as an object becomes more familiar, its internal representation becomes more holistic and the recognition process correspondingly more parallel, the weight of the evidence seems to support the serial hypothesis, at least for objects that are not notably simple and familiar.

　　15. In large part as a consequence of the feminist movement, historians have focused a great deal of attention in recent years on determining more accurately the status of women in various periods.

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