School of Psychology

Dr. Tammy Sonnentag

Associate Professor, School of Psychology


Dr. Sonnentag is a developmental psychologist with specific interest in the factors that affect individuals’, particularly young individuals’, willingness to stand up for their beliefs and values despite the behavior of others. Dr. Sonnentag earned her Ph.D. from Kansas State University.


Courses Dr. Sonnentag regularly teaches:

Psyc 210 – Statistical Techniques

Psyc 221 & 223 – Research Methods & Design I (with Lab)

Psyc 222 & 224 – Research Methods & Design II (with Lab)

Psyc 608 – Integrative Lifespan Psychology I

Psyc 609 – Integrative Lifespan Psychology II


Selected Recent Representative Publications:

Sonnentag, T. L., McManus, J. L., Wadian, T. W., & Saucier, D. A. (2019). Prioritizing morality in the self and consistent moral responses despite situational pressures to respond immorally. Journal of Moral Education, 48, 412-422. .

Wadian, T. W., Sonnentag, T. L., Jones, T. L., & Barnett, M. A. (2019). Role of fault attributions and other factors in adults’ attitudes toward hypothetical children with an undesirable characteristic. Psychological Reports, 122(1), 61-78.

Saucier, D. A., Webster, R. J., McManus, J. L., Sonnentag, T. L., O’Dea, C. J., & Strain, M. L. (2018). Individual differences in masculine honor beliefs predict attitudes toward aggressive security measures, war, and peace. Peace and Conflict: Journal of Peace Psychology, 24, 112-116. doi:10.1037/pac0000303

Sonnentag, T. L., Wadian, T. W., Barnett, M. A., Gretz, M. R., & Bailey, S. M. (2018). Characteristics associated with individuals’ caring, just, and brave expressions of the tendency to be a moral rebel. Ethics & Behavior, 28, 411-428. doi:10.1080/10508422.2017.1304821

Wadian, T. W., Barnett, M. A., & Sonnentag, T. L. (2017). Destigmatization by association: Improving children’s reactions to an obese storybook character. Journal of General Psychology, 2, 130-139. doi:10.1080/00221309.2016.1276045

Sonnentag, T. L. & Barnett, M. A. (2016). Role of moral identity and moral courage characteristics in adolescents’ tendencies to be a moral rebel. Ethics & Behavior, 26, 277-299. doi:10.1080/10508422.2015.1012765

Recently Mentored Dissertations:

Pettis, S. (In Progress). Is knowledge of (normative) racial identity development necessary?: White transracial adoptive parents' intentions to promote Black adoptees’ racial identity.

Rudy, S. (In Progress). The effects of morally reframed messages on white individuals’ attitudes toward white privilege.

Mattila, S. (In Progress). Does the quality of sibling relationships moderate the negative impact of adverse childhood experiences (ACEs) on wellbeing in adulthood?

Liddle, M. (2019, June). Effectiveness of adaptive care plans for children with developmental disabilities during outpatient clinic appointments.

Esmeier, C. (2019, March). Impact of female adolescents’ motivations for managing online photographic self-presentations on their social and psychological wellbeing.

Antennuci, C. (2019, March). Effects of nursing students’ emotion-related motivations to care for geriatric patients of varying weights.

Professional Interests

Moral Psychology, Character Development, Development and Expression of Prosocial Emotions and Behaviors, Moral Rebellion and Moral Non-Conformity

First Year at Xavier