Jordan-Young's book is a enormously worthwhile exploration as to what has gone wrong in brain science. While other scholars within science studies have pointed toward the many ways in which bias are (perhaps unavoidably) structured into scientific studies, Jordan-Young offers a careful exploration as to the specific ways in which such research has been flawed. Much of her analysis concerns ways in which brain scientists have measured either masculinity/femininity (in research on sex differences) or homo/heterosexuality (in research on "the gay gene). While many brain scientists have taken these constructs for granted, it turns out that studies are using many different definitions in their research, even contradictory ones, yet they have generally failed to recognize this basic fact, with many researchers citing earlier studies that actually *contradict* theirs as evidence in favor of their own conclusions.
Jordan-Young seems to have written this evaluation in hopes of pointing out these flaws to both a popular audience and to brain researchers themselves. It's been disappointing then, to see the reviews this book has received in the scientific journals. Basically, the response has been to agree that Joran-Young has pointed out many serious flaws in the research, but to then go on and assert "Well, there are *other* studies that I like, and Jordan-Young does not discuss those. So overall, we should continue to believe in these sex/sexual orientation differences." OK, well, I'm not a brain researcher myself, just an interested observer, so *perhaps* they're right. BUT, what about all the junk science that's there? Why not be concerned about it? Why not say "Whoa! Look at all this junk! How did all this get here? How did people go about for so long without noticing how messy things were here? What can we do to clean it up?" No, instead they just say "I still believe." I'm inclined to be suspicious of researchers who - upon seeing how much error and bias has been prevalent within the field - nevertheless seem more concerned in defending a conclusion than in making sure that research is done well. Jordan-Young, meanwhile, offers many suggestions as to how bias in the field might be addressed, and brain research done more effectively.
Also, I might add that Jordan-Young is a great writer - very clear, even when handling complicated material. If you ave an interest at all, it's well worth the time!