| Many IQ tests show that there are no
significant differences in the mean, or average scores of IQ tests between men
and women. When a new IQ test, is being constructed, it is quite easy to find
test{{U}} (51) {{/U}}that are not answered correctly{{U}} (52)
{{/U}}the same proportions of men and women,{{U}} (53) {{/U}}these
are usually then eliminated from the test. So, to some{{U}} (54)
{{/U}}the fact that no differences are to be found in our current IQ tests
between the{{U}} (55) {{/U}}for the two sexes is hardly
surprising. There are,{{U}} (56) {{/U}}, differences in the standard deviations(偏差)or variability of the{{U}} (57) {{/U}}of the two sexes in many IQ tests,{{U}} (58) {{/U}}men showing the greater variation. The{{U}} (59) {{/U}}of many IQ test scores are such{{U}} (60) {{/U}}they approximate to the normal curve(正规曲线). If we regard some arbitrary lower score on a test as a classification like "educational subnormal(智力上逊常的人)" (ESN) and some equally arbitrary{{U}} (61) {{/U}}score as "gifted", we then find that there is higher ratio of ESN males to women and likewise we{{U}} (62) {{/U}}that there are more gifted men than women, even though the average scores are the same. The{{U}} (63) {{/U}}of men and women are known to differ somewhat in size, with women having about 200g less tissue{{U}} (64) {{/U}}the other hand, they also tend to{{U}} (65) {{/U}}less body mass, and over the phylogenetic(系统发育的)scale, the best index of species intelligence is the ratio of body mass to brain size. |