Roni Cohen-Sandler, Ph.D., is a clinical psychologist, author, consultant, and lecturer who specializes in the issues of women and girls, parenting adolescents, mother-daughter relationships, and learning disorders. She is the author of three books, numerous scholarly articles in professional journals, and chapters in books on parenting.

Dr. Cohen-Sandler has been a parenting expert on national media such as The Oprah Winfrey Show, The Today Show, Good Morning America, CBS News, Pure Oxygen, and National Public Radio. She is frequently interviewed for newspapers and popular magazines, such as Newsweek, The New York Times, USA Today, The Chicago Tribune, The Boston Globe, USA Weekend magazine, Marie Claire, Better Homes and Gardens, YM, Parenting, Teen People, Family Circle, Teen Vogue, Redbook, Glamour, and Newsday. Dr. Cohen-Sandler is a Contributing Editor to Girls' Life, the national magazine for girls, and writes a parenting column for Weston Magazine. 

Dr. Cohen-Sandler's most recent book, Stressed-out Girls: Helping Them Thrive in the Age of Pressure, which is based on interviews and surveys of 3,000 middle school and high school students, has been striking a chord with teenage girls as well as their parents and teachers across the country. Her first book, I'm Not Mad, I Just Hate You! A New Understanding of Mother-Daughter Conflict, was a national bestseller that has also been published in England, New Zealand, Australia, China, Greece, Poland, and Japan. Dr. Cohen-Sandler’s second book, Trust Me, Mom--Everyone Else is Going! The New Rules for Mothering Teenage Daughters, also published in Portugal, won a National Parenting Publication 2002 Gold Medal and addresses girls' social lives, including friendships, romantic relationships, socializing, discipline, and many other contemporary parenting issues.

Dr. Cohen-Sandler has been an invited guest lecturer, panel moderator, and workshop presenter for universities such as Harvard Medical School, Duke University Health Centers, Northwestern University, NYU, and the University of Chicago, as well as public and independent middle and high schools, such as The Hockaday School, Georgetown Day School, Baldwin School, The Ellis School, The Ethel Walker School, and the Berkeley Carroll School.

Dr. Cohen-Sandler is a member of the American Psychological Association (APA), the Connecticut Psychological Association (CPA), and the APA's Speaker's Bureau. Married with a grown daughter and a son in college, she lives in southwestern Connecticut.