Dr. Horn's primary research focus is to examine if and how the behavior and psychosocial growth of children, adolescents, and young adults in sport and physical activity contexts is affected by significant others (e.g., coaches, parents, teammates) in their social environment.

KNH 272: Contemporary Perspectives on Leadership in Sport Contexts
KNH 4/538: Principles of Effective Coaching
KNH 621: Research Foundations in Kinesiology and Health
KNH 673: Developmental Perspectives on Youth Sport Participation

Horn, T.S. (2016). Actively caring coaching for young athletes. In E.S. Gellar (Ed.), Applied Psychology: Actively caring for people (pp. 535-563). NY: Cambridge University Press.

Horn, T.S., Lox, C., & Labrador, F. (2015). The self-fulfilling prophecy theory: When coaches' expectations become reality. In J. M. Williams & V. Krane (Eds), Applied sport psychology: Personal growth to peak performance (7th Ed.) (pp 78-100). NY: McGraw-Hill. 

Horn, T.S. (2015). Social psychological and developmental perspectives on early sport specialization. Kinesiology Review, 4, 248-266.

Lewis, P., Kimiecik, J., Horn, T., Zullig, K.J., & Ward, R.M. (2014). Can becoming myself influence my health?: Exploring the effects of a eudaimonic-enhancement process on psychological indicators of well-being and physical activity. Applied Research in Quality of Life, 9, 643-665. 

Martin, E.M. & Horn, T.S. (2013). The role of athletic identity and passion in predicting burnout in adolescent female athletes. The Sport Psychologist, 27, 338-348. 

Horn, T.S. & Newton, J.L. (chapter under revision). Developmental perspectives on motivated behavior. In T.S. Horn & A. Smith (Eds.). Advances in Sport and Exercise Psychology (4th ed.). Champaign, IL: Human Kinetics.

Newton, J., Horn, T.S., Evers, J. & Hengehold, E. (in progress). The effects of school type and athlete status on the self-perceptions of high school females. 

Frasher, C., Horn, T.S., & Kovach, M. (in progress). Examining links between organizational leadership culture, emotional intelligence, and motivational orientation in military recruits.