Deborah L. Tolman is professor of social welfare and psychology at The Silberman School of Social Work at Hunter College and The Graduate Center of The City University of New York, where she trains doctoral students studying women's lives and sexuality-related topics. Dr. Tolman is an applied developmental psychologist whose research has focused on adolescent sexuality, gender development, gender equity, and research methods. Her groundbreaking book on adolescent girls' sexuality, Dilemmas of Desire: Teenage Girls Talk About Sexuality, published in 2 2, was awarded the 2 3 Distinguished Book Award from the Association for Women in Psychology. Her research has covered the impact of television on adolescent sexuality, the roles of beliefs about masculinity and femininity in adolescent girls' and boys' experiences of sexual and romantic relationships and mental health, and adolescent girls' experiences with fellatio. She is currently revisiting how adolescent girls are negotiating their own sexuality in the current complex social landscape of sexualization and choice and other contradictory messages about female and adolescent sexuality. Her work has been supported by the National Institute of Child Health and Development, the Spencer Foundation, the Ford Foundation, the Atlantic Philanthropies and the NoVo Foundation. She has published more than 75 peer-reviewed articles and book chapters and several books on adolescent sexuality, research methods, and feminist theory. Dr. Tolman is a Fellow of APA, Division 35 (Society for the Psychology of Women) and Division 9 (Society for the Psychological Study of Social Issues [SPSSI]) and has received wide recognition for her contributions to female adolescent development. She was a member of APA's Task Force on the Sexualization of Girls and an author of its report, the most frequently downloaded document on APA's website, which was the impetus for her cofounding SPARK, an intergenerational girl-fueled social movement to challenge the sexualization of girls. Through this work, she is building a bridge between academia and activism to create enabling conditions in which girls can develop healthy sexuality and well-being. Among awards she has received are APA's Committee on Women's Leadership Award and SPSSI's Louise Kidder Early Career Award. She earned her doctorate in human development and psychology at the Harvard Graduate School of Education in 992. She was senior research scientist and associate director at the Center for Research on Women at Wellesley College, and professor of sexuality studies and founding director of the Center for Research on Gender and Sexuality at San Francisco State University.   Lisa M. Diamond is professor of psychology and gender studies at the University of Utah. Her research focuses on close relationships and sexuality over the life span, with a particular emphasis on their biobehavioral underpinnings and health implications. The three primary areas of her research are the development of sexual desire, identity, and orientation over the life span influences of close relationships on mental and physical health and the role of biologically based capacities for emotion regulation in shaping the development and experience of intimate relationships. Dr. Diamond is best known for her unprecedented longitudinal study of lesbian, bisexual, heterosexual, and amp quot unlabeled amp quot women, whom she has been interviewing approximately every two years since 995, tracking changes in their sexual identities, attractions, and behaviors over time. Her 2 8 book, Sexual Fluidity, describes the changes and transformations that her respondents underwent from late adolescence to adulthood, and profiles some of the most intriguing women in detail. Sexual Fluidity has been awarded the Distinguished Book Award from APA's Division 44 (Society for the Psychology of Sexual Orientation and Gender Diversity). Dr. Diamond has received numerous awards for her work from APA's Committee on Lesbian, Gay, Bisexual, and Transgender Concerns, the American Association of University Women, the Society for the Scientific Study of Sexuality, and APA Division 9 (Society for the Psychological Study of Social Issues). In 2 she was granted Fellow status in APA Division 44 (Society for the Psychology of Sexual Orientation and Gender Diversity). Dr. Diamond has been awarded grants in support of her research from the National Institute for Mental Health, the W. T. Grant Foundation, the American Psychological Foundation, the American Institute for Bisexuality, and the Templeton Foundation. Her current work focuses on understanding associations between day-to-day changes in gonadal hormone levels and day-to-day changes in same-sex and other-sex desires, investigating the psychological and biological mechanisms through which sexual activity relates to mental and physical health, and understanding the origins of individual differences in sexual fluidity.