• About Me

    Psychological Scientist | Ph.D. Candidate at Emory University

    Certain personality traits, thinking styles, and worldviews give rise to maladaptive political attitudes and behaviors, such as violence, extreme partisanship, and authoritarianism. My research leverages the tools and expertise of personality psychology and clinical science to understand, measure, and statistically model the psychological causes and correlates of these attitudes and behaviors.


    When not writing bios, I enjoy reading about politics, spending time with those close to me, and writing poetry.



  • Selected Journal Aritcles

    Costello, T.H., Bowes, S.M., Stevens, S.T., Waldman, I.W., Tasimi, A., & Lilienfeld, S.O. (In press). Clarifying the structure and nature of left-wing authoritarianism. Journal of Personality and Social Psychology. [Preprint]


    Bowes, S.M., Costello, T.H., Lee, C., Davis, D.E., McElroy-Heltzel, S., & Lilienfeld, S.O. (In press). Stepping outside the echo chamber: Is intellectual humility associated with reduced partisan bias? Personality and Social Psychology Bulletin.


    Bowes, S.M., Costello, T.H., Ma, W., Lilienfeld, S.O. (2020). Looking under the tinfoil hat: Clarifying the personological and psychopathological correlates of conspiracy beliefs. Journal of Personality. Advance online publication. [PDF]  


    Costello, T.H., & Lilienfeld, S.O. (2020). Social and economic political ideology consistently operate as mutual suppressors: Implications for personality, social, and political psychology. Social Psychological and Personality Science. Advance online publication. [PDF]


    Costello, T.H., Bowes, S.M., Lilienfeld, S.O. (2020). “Escape from Freedom”: Authoritarianism-related traits, political ideology, personality, and belief in free will/determinism. Journal of Research in Personality, 86, 1-16. [PDF]


    Costello, T.H., Watts, A.L., Murphy, B.A., Lilienfeld, S.O. (2020). Extending the nomological network of interpersonal sexual objectification to psychopathic and allied traits. Personality Disorders: Theory, Research, and Treatment, 11, 237-248. [PDF]


    Costello, T.H., Smith, S.F., Bowes, S., Riley, S., Berns, G., Lilienfeld, S.O. (2019). Risky business: Psychopathy, framing effects, and financial outcomes. Journal of Research in Personality, 78, 125-132. [PDF]


    Murphy, B.A., Costello, T.H., Lilienfeld., S.O. (2018). Is empathic contagion helpful or harmful: Overlooked heterogeneity in the Empathy Index. Psychological Assessment, 30, 1703-1708. [PDF]


    Costello, T.H., Unterberger, A., Watts, A.L., & Lilienfeld, S.O. (2018). Psychopathy and pride: Testing Lykken’s hypothesis regarding the implications of fearlessness for prosocial and antisocial behavior. Frontiers in Psychology, 9, 185. [HTML]


    Murphy, B.A., Costello, T.H., Watts, A.L., Berg, J.M., & Lilienfeld, S.O. (2018). Strengths and weaknesses of two empathy measures: A comparison of the measurement precision, construct validity, and incremental validity of two multidimensional indices. Assessment. [PDF]

  • Media coverage

    Culture beat: Left-wing authoritarians are real. Post Editorial Board. New York Post. May 29th, 2020.


    Is there such a thing as a left-wing authoritarian? Andre Spicer. New Statesman. May 26th, 2020.


    New study finds authoritarian personality traits are associated with belief in determinism. Eric Dolan. PsyPost. 

    May 18th, 2020.


    Opening minds. National Affairs. Kevin Lewis. May 15th, 2020.


    Researchers identify key personality correlates of interpersonal sexual objectification. James Ives. The Medical News. January 27th, 2020.


    How personality predicts seeing others as sex objects. MedicalXpress. January 27th, 2020.

  • Data visualization

    I find it quite fun to design and construct scientific figures. Here are a few that I'm particularly proud of (open code coming soon)!





  • Scale Construction, Data Viz, and Statistics

    I am currently available to help solve your statistical-, data visualization-, and scale construction-related problems. For more information, contact me at thcostello1@gmail.com.

    Areas of Statistical Speciality

    Latent variable models (e.g., SEM, ESEM, bifactor models)

    Item response theory

    Meta-analysis (e.g., multivariate, multi-level)

    Factor analysis (e.g., EFA, CFA)

    Multiple regression

    Software Proficiencies

    MPlus, R, Python, JASP, SPSS, ggplot2, Adobe Illustrator, Plotly, Qualtrics, Survey Monkey, Amazon’s Mechanical Turk.

  • Education

    Emory University

    Psychology, Ph.D.

    Expected 2022

    I am currently pursuing my Ph.D. in Clinical Psychology under the guidance of Dr. Scott Lilienfeld.


    Emory University

    Clinical Psychology, M.A.

    I completed my Master's degree in 2018.

    Binghamton University, State University of New York

    Psychology and Philosophy, B.A.

    I graduated from Binghamton University in 2016 with bachelor's degrees in Psychology and Philosophy. As a sophomore, I began working as a research assistant and honors student in Dr. Steven Jay Lynn's laboratory, leading an experimental study of the relation between belief in free will and depressive symptomatology.

  • Social feed

  • Let's be friends!