Katherine M. Hertlein

Professor, Couple and Family Therapy
Expertise: Infidelity, Sex Therapy, Child and Adolescent Therapy, Technology and Relationships, Internet Infidelity, High-Risk Sexual Behavior, Narcissism


Katherine M. Hertlein is a globally recognized researcher studying sexuality, technology, and its effects on couples. As she examines the role of technology in couple and family life, Hertlein has developed the first multi-theoretical model on this issue.

In addition to technology and relationships, Hertlein’s other areas of expertise include infidelity, sexuality, high-risk sexual behavior, child and adolescent therapy, and cyber issues in couple and family therapy. She is a licensed marriage and family therapist, an American Association for Marriage and Family Therapy Approved Supervisor, and a PREPARE/ENRICH Certified Counselor.

Hertlein has co-authored 12 books, including Handbook for the Clinical Treatment of Infidelity, The Therapist’s Notebook for Family Healthcare, Handbook for the Treatment of Infidelity, Systemic Sex Therapy, and A Clinician’s Guide to Systemic Sex Therapy, which are used in many couples and family therapy training programs around the United States. She has published more than 90 articles in the notable journals in her field, contributed over 40 chapters to books, and serves on the editorial boards for several academic journals. She was recently appointed as the editor-in-chief of the Journal of Couple and Relationship Therapy.

Hertlein earned the Greenspun College of Urban Affairs Outstanding Research Award twice and the Greenpsun College Teaching Award. She also has won the a distinguished Fulbright Core Scholar Award, Barrick Scholar Award, the Regent's Rising Researcher Award, the Distinguished Barrick Scholar Award, Outstanding Graduate Student Mentor, and Supervisor of the Year award from the Nevada Association for Marriage and Family Therapy.


  • B.A., Psychology, Truman State University
  • M.S., Marriage and Family Therapy, Purdue University Calumet
  • Ph.D., Marriage and Family Therapy, Virginia Tech University

Katherine M. Hertlein In The News

Deseret News
Couples who struggle getting rest may find a solution in the internet’s newest sleep fascination: sleep divorce.
Women’s health, and especially women’s sexual health, is still critically under-researched. It can lead to some conditions being misunderstood or, worse, stigmatised, not only by those dealing with them but also by GPs and other medical professionals.
Gaslighting is no longer a novelty, but in the meantime there is a new 'lighting' in the dating world: bluelighting. We already knew that the light coming from your television, smartphone or laptop is bad for your eyes, but your relationship can also suffer from all those screens. Glasses with a blue light filter will not help, but what will?
K.N.P.R. News
The biggest question many in Las Vegas have: How do you find it? Do you do the checklist method, or do you believe it has to be a gut feeling, love at first sight? Is Las Vegas really that much more difficult than other cities to meet someone? And if you lost someone, how do you get past it — is it really just time that heals; is it hopping in the sack with the first likely suitor who comes along?

Articles Featuring Katherine M. Hertlein

a teacher and student in a classroom
Campus News | March 7, 2022

A collection of news stories highlighting the experts and events at UNLV.

A man stocking shelfs at the food pantry
Campus News | December 8, 2021

A collection of news stories featuring research and accomplishment at UNLV.

A researcher working in the lab of the Chambers-Grundy Center for Transformative Neuroscience
Campus News | October 7, 2021

A collection of news stories featuring collaboration and reflection at UNLV.

Students pose between U.N.L.V. letters
Campus News | July 9, 2021

A collection of news stories highlighting remembrance and improvement at UNLV.