Pinker, whom Summers recruited to Harvard last year, cited evidence arguing that male superiority in skills like mental object rotation and problem solving provides a biological basis for the argument that men are more talented at math and science.
Spelke countered, acknowledging the existence of differences between men and women, but arguing that the reason "women are as scarce as hen's teeth" in academia is due to discrimination.
"The debate is not, are there sex differences,' it's, do they add up to an advantage for one gender over the other,'" Spelke reminded the audience.
Prefacing his comments by saying that he was a feminist, Pinker stressed the importance of distinguishing between the moral and empirical claims about gender differences.
"The truth cannot be sexist," he said.
Though Spelke attacked his yardstick indicatorthe SAT mathematics examinationsPinker maintained that "the tests are very good. They have an enormous amount of predictive power."
Pinker also noted that men and women tend to have different priorities in life; men seek status and money, while women look more for interpersonal relationships.
"What this means is that there are slightly more men than women who don't care whether or not they have a life," Pinker said.
Spelke did not address the argument about motives directly, saying that she did not think there was evidence available to evaluate the claim that motives are biologically determined.
She focused on proving the existence of covert discrimination by looking at how gender stereotypes influence...