• Biography
  • Courses Taught
  • Educational History
  • Professional Societies
  • Publications
  • Scholarship/Research


I spent my formative years mostly in Europe, including high school at the American Community School in Athens, Greece. I began my education in music studying the classical guitar at the Peabody Conservatory (Baltimore, MD). I completed a bachelor's degree in music performance at the University of South Carolina (Columbia, SC) where I began my teaching career as Director of the Classical Guitar Program. I went on to complete my master's and doctoral degrees in Clincal Psychology at the University of Wisconsin-Milwauke and clinical psychology  internship in St. Louis, MO. More recently, I studied Epidemiology and Biostatistics at the Karolinska Institutet in Stockholm, Sweden.

Hobbies: Learning new things, travel, history, literature, music, snorkling, windsurfing, standup paddling.

Courses Taught

I generally teach courses and conduct research in the areas of personality, psychopathology, and related topics such as psychological testing and measurement.

Courses taught:

  • Introduction to Psychology
  • Psychopathology
  • Personality Psychology
  • Psychological Assessment
  • Research Practicum


Educational History

  • Ph.D., Clinical Psychology, University of Wisconsin–Milwaukee
  • Pre-Doctoral Clinical Psychology Internship, St. Louis Metropolitan Psychiatric Center, St. Louis, MO
  • M.S., Clinical Psychology, University of Wisconsin–Milwaukee
  • B.M., Music Performance, University of South Carolina, Columbia
  • Music Performance Scholarship, Peabody Conservatory of Music, Johns Hopkins University, Baltimore, MD

Professional Societies

  • Association for Psychological Science
  • Association for Research in Personality
  • Behavior Genetics Association
  • International Society for the Study of Individual Differences
  • International Society for Twin Studies
  • Society for a Science of Clinical Psychology


  • Sadler, M., Estabrook, R., Martin, N. (2013). Measurement nonivariance in the Delusions Symptoms State Inventory across middle-age and late-life. (submitted for publication).
  • Estabrook, R., Sadler, M., & McGue, M. (2012). Differential item functioning in the CAMDEX depression scale across middle age and late-life. Paper presented at the Behavior Genetics Association conference, June, 2012, Edinburg, SCT (in press)
  • Sadler, M., Miller, C., Christensen, K., & McGue, M. (2011). Subjective well-being and longevity: A co-twin control study. Twin Research and Human Genetics, 14(3), 249–256.
  • Sadler, M., Hunger, J., & Miller, C. J. (2010). Personality and impression management: Mapping the Multidimensional Personality Inventory onto twelve self-presentation tactics. Personality and Individual Differences, 48, 623–628.
  • Sadler, M., & Miller, C. (2010). Performance anxiety: A longitudinal study of the roles of personality and experience in musicians. Social and Personality Psychological Science, 1(3), 280–287.


I am interested broadly in understanding differences among individuals in personality traits and psychopathology, the origins of these differences, and their interaction with experience in producing mental health outcomes in adolescence, adulthood and late life. My research in aging uses data from ongoing twin studies in Denmark and Australia; I particularly enjoy international and interdisciplinary collaborations.

My lab is currently running a study aimed at understanding the interplay among multiple risk factors for depression, anxiety, weight gain and disordered eating.

Food for thought:

"Often before now I have applied my thoughts to the puzzling question – one, probably, which will puzzle me for ever – why it is that, while all Greece lies under the same sky and all Greeks are educated alike, it has befallen us to have characters so variously constituted."   Theophrastus