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About

I earned a Ph.D. in Psychology with a Clinical emphasis and a Graduate Certificate in Women's Studies from the University of Kansas. I completed a clinical-research postdoctoral fellowship at IU’s Kinsey Institute before taking a tenure-track position at the University of Missouri-St. Louis. I came back to IU in 2018 as an Associate Professor in the Counseling Psychology Program and Director of the Sexual Assault Research Initiative at the Kinsey Institute. My research interests are in the areas of gender and human sexuality, with a particular focus on investigating experiences of unwanted, coerced, and nonconsensual sex from the perspectives of both victims and perpetrators. I was the editor of the Wiley Handbook of Sex Therapy, and I served as Associate Editor of the Journal of Sex Research from 2013-2019. I was elected and served as President of the Society for the Scientific Study of Sexuality for 2019-2021. I also am a Licensed Psychologist with an emphasis in sex therapy and feminist, constructivist, and solution-focused approaches to therapy. I will not be accepting new doctoral students for Fall 2023.

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Skills

Experience

Professor

Indiana University (IU)

Jul-2020 to Present

Publication

  • dott image July, 2024

Preliminary Prevalence Estimates of Sexual Exploitation as Measured by the Sexual Experiences Survey-Victimization (SES-V) in a National US Sample

The new Sexual Experiences Survey-Victimization (SES-V) was designed to capture a larger range of sexual exploitation and to be applicable to more diverse populations than prior measures. Th...

  • dott image July, 2024

The Revised Sexual Experiences Survey Victimization Version (SES-V): Conceptualization, Modifications, Items and Scoring

The Sexual Experiences Survey [SES] is considered the gold standard measure of non-consensual sexual experiences. This article introduces a new victimization version [SES-V] developed by a m...

  • dott image July, 2024

Preliminary Evidence of Validity for the Verbally Pressured and Illegal Sexual Exploitation Modules of the Sexual Experiences Survey-Victimization

The Sexual Experiences Survey-Victimization (SES-V; see Koss et al., Citation2024) revises the prior 2007 Sexual Experiences Survey-Short Form Victimization (SES-SFV) in many ways, including...

  • dott image July, 2024

Words Can Hurt: A Taxonomy of Verbally Pressured Sexual Exploitation in the SES-V

This article describes the development of the Verbally Pressured Sexual Exploitation module of the Sexual Experiences Survey (SES)-Victimization (introduced by Koss et al., 2024). This modul...

  • dott image July, 2024

Quantifying Criminal Sexual Acts: The Illegal Sexual Exploitation Module of the Revised Sexual Experiences Survey-Victimization (SES-V) Measure

Since the initial development of the Sexual Experiences Survey (SES) four decades ago, the SES has been designed to measure a range of forms of sexual exploitation, including acts that are c...

  • dott image January, 2014

Consenting to Sexual Activity: The Development and Psychometric Assessment of Dual Measures of Consent

Sexual assault prevention efforts have focused on educating students to obtain consent as a mechanism to reduce sexual assault, yet little is known about how college students consent to sex....

  • dott image August, 2013

Gender Differences in Heterosexual College Students' Conceptualizations and Indicators of Sexual Consent: Implications for Contemporary Sexual Assault...

Because sexual assault is often defined in terms of nonconsent, many prevention efforts focus on promoting the clear communication of consent as a mechanism to reduce assault. Yet little res...

  • dott image October, 2017

Child Sexual Abuse and Negative Affect as Shared Risk Factors for Sexual Aggression and Sexual HIV Risk Behavior in Heterosexual Men

Previous research has suggested that sexually aggressive behavior and sexual HIV risk behavior are associated. Childhood sexual abuse (CSA) is a well-established risk factor for both types o...