What differentiates women from men cannot simply stem from different wiring. Dr. Brizendine, who calls herself a feminist, said, "I know it is not politically correct to say this, but I've been torn for years between my politics and what science is telling us. I believe women actually perceive the world differently from men." "The Female Brain" is based on Brizendine's own clinical work at the Women's and Teen Girls' Mood and Hormone Clinic as well as analyses of over "1,000 scientific studies from the fields of genetics, molecular neuroscience, fetal and pediatric endocrinology and neurohormonal development." She concluded, "Girls arrive already wired as girls, and boys arrive already wired as boys."
Many, both in her field and outside of it, are skeptical of Brizendine's conclusions, however, and offer that social conditioning rather than biology are responsible for the behavioral differences between men and women, rather than the effect of testosterone on the brain.