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Sibley, Margaret Harper, PhD

Title: Associate Professor, Department of Psychiatry and Behavioral Health

Office: AHC1 246

Phone: 305-348-3005


Specialty: Psychosocial treatments for adolescents with ADHD, Diagnostic assessment for ADHD and comorbid problems

Languages Spoken: English

Education: PHD, Clinical Psychology, State University of New York at Buffalo

Practice Location: CCF

Department(s): Psychiatry and Behavioral Health

Dr Sibley's research addresses the need to develop and disseminate age-appropriate and feasible psychosocial interventions for adolescents with Attention-Deficit/Hyperactivity Disorder (ADHD). She and her colleagues currently conduct two federally-funded clinical trials that evaluate new models of behavioral treatment delivery for these youth. In addition, Dr Sibley has researched and published several papers on improving the diagnostic assessment of ADHD in children, adolescents, and adults. Some of her work also addresses the adolescent and young adult outcomes of children diagnosed with ADHD who were followed longitudinally into adulthood. Dr Sibley directs the Summer Treatment Program- Adolescent and the Supporting Teens' Academic Needs Daily (STAND program) at the Florida International University (FIU) Center for Children and Families. Dr Sibley is a native of Miami who received her undergraduate education at Wake Forest University and completed a Master's Degree in Psychological Sciences from James Madison University. In 2012, she completed her PhD in Clinical Psychology from the State University of New York at Buffalo, as an American Psychological Foundation Fellow, with national recognition for her dissertation research. After completing her internship in Clinical Psychology at FIU, she joined the Psychiatry and Behavioral Health faculty with a commitment to research that betters the well-being and quality of care for families of individuals with ADHD.

Education and Training

  • PhD, Clinical Psychology, State University of New York at Buffalo
  • MA, Psychological Sciences, James Madison University
  • BA, Political Science, Wake Forest University


  • 2015 FIU Top Scholar Award 
  • 2011 State University of New York at Buffalo, Psychology Dissertation Award
  • 2010 American Psychological Association, Dissertation Award
  • 2010 Association for Behavioral and Cognitive Therapies, Virginia Roswell Dissertation Award
  • 2010 American Psychological Foundation, Elizabeth Munsterberg-Koppitz Fellowship


  • Pelham, W.E., Meichenbaum, D., Smith, B., Sibley, M.H., Gnagy, E., & Bukstein, O. (in press). Acute Effects of MPH on the Parent–Teen Interactions of Adolescents with ADHD. J Atten Disord.
  • Pelham, W.E., Smith, B.H., Evans, S.W., Bukstein, O., Gnagy, E.M., Greiner, A.R., & Sibley, M.H. (in press). The effectiveness of short and long-acting stimulant medications for adolescents with ADHD in a naturalistic secondary school setting. J Atten Disord.
  • Babinski, D.E., Pelham, W.E., Molina, B.S.G., Gnagy, E.M., Waschbusch, D.A., Wymbs, B.T., Sibley, M.H., & Kuriyan, A.B. (in press).  Maternal ADHD, parenting, and psychopathology among mothers of adolescents with ADHD. J Atten Disord.
  • Pelham, W.E., Gnagy, E.M., Sibley, M.H., Kipp, H.L., Smith, B.H., Evans, S.W., & Bukstein, O. (in press). Attributions and Perception of Methylphenidate Effects in Adolescents with ADHD. J Atten Disord.
  • Sibley, M.H., & Yeguez, C.E. (in press). The Impact of DSM-5 A-Criteria Changes on Parent Ratings of ADHD in Adolescents. J Atten Disord.
  • Sibley, M. H., Rohde, L. A., Swanson, J. M., Hechtman, L. T., Molina, B. S., Mitchell, J. T., ... & Stehli, A. (2018). Late-onset ADHD reconsidered with comprehensive repeated assessments between ages 10 and 25. American Journal of Psychiatry, 175 (2);140-149