Page "Sex and psychology" Paragraph 8

According to Diane F. Halpern, some combination of social and biological factors may be at work in psychological sex differences.

She wrote in the preface of her 2000 book Sex Differences In Cognitive Abilitiess " Socialization practices are undoubtedly important, but there is also good evidence that biological sex differences play a role in establishing and maintaining cognitive sex differences, a conclusion I wasn't prepared to make when I began reviewing the relevant literature.