For example, she explains weaknesses in the work done by a student of Simon Baron-Cohen that has been widely cited (by the Gurian Institute, by Leonard Sax, by Peter Lawrence, and by Baron-Cohen himself): one-and-a-half-day-old babies were tested for preference in sequence rather than being given a choice were tested in different viewing positions, some horizontal on their backs and some held in a parent's lap, which could affect their perception inadequate efforts were made to ensure the sex of the subject was unknown to the tester at the time of the test the authors assume, without justification, that newborn looking preferences are a reliable 'flag' for later social skills that are the product of a long and complex developmental process. Fine also discusses non-neuroimaging evidence cited as support for innate differences between the sexes. Fine also demonstrates how already weak neuroscientific conclusions are then grossly overblown by popular writers. Within neuroscientific investigations, these include small samples that give rise to unreliable, spurious results, and poorly justified 'reverse inferences' (claims of stereotype-consistent psychological differences between the sexes on the basis of brain differences).

In the second part of the book, 'Neurosexism', Fine criticizes the current available arguments and studies supporting sex differences in the mind, focusing on methodological weaknesses and implicit assumptions. She also discusses the history and impact of gender stereotypes and the ways that science has been used to justify sexism.

In the first part of the book, ''Half Changed World', Half Changed Minds', Fine argues that social and environmental factors strongly influence the mind, challenging a 'biology as fallback' view that, since society is equal now for the sexes, persistent inequalities must be due to biology. The author criticizes claimed evidence of the existence of innate biological differences between men and women's minds as being faulty and exaggerated, and while taking a position of agnosticism with respect to inherent differences relating to interest/skill in 'understanding the world' versus 'understanding people', reviews literature demonstrating how cultural and societal beliefs contribute to sex differences. Delusions of Gender: How Our Minds, Society, and Neurosexism Create Difference is a 2010 book by Cordelia Fine, written to debunk the idea that men and women are hardwired with different interests.

Cordelia fine neurosexism