Ariel A. Williamson, PhD, DBSM

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Ariel A. Williamson, PhD, DBSM, is a psychologist in the Department of Child and Adolescent Psychiatry and Behavioral Sciences at Children's Hospital of Philadelphia.

Locations: Main Hospital
Appointments and Referrals: 1-800-TRY-CHOP (1-800-879-2467)

Education and Training


Predoctoral Internship in Clinical Psychology and Integrated Behavioral Health - Children’s Hospital of Philadelphia, Philadelphia, PA


Behavioral Sleep Medicine, Perelman School of Medicine, University of Pennsylvania

Board Certification

Diplomate in Behavioral Sleep Medicine (DBSM) – Board of Behavioral Sleep Medicine

Graduate Degree

PhD in Clinical Psychology - University of Delaware, Newark, DE
MA in Clinical Psychology - University of Delaware, Newark, DE
MA in Counseling Psychology, Child Track - Northwestern University, Evanston, IL

Titles and Academic Titles


Diplomat in Behavioral Sleep Medicine

Assistant Professor of Psychology in Psychiatry, Perelman School of Medicine, University of Pennsylvania

Departments and Services




Billings, M., E., Cohen, R. T., Baldwin, C. M., Johnson, D. A., Palen, B. N., Parthasarathy, S., Patel, S. R., Russell, M., Tapia, I. E., Williamson, A. A., & Sharma, S. (2020). Disparities in sleep health and potential intervention models: A focused review. CHEST.

Williamson, A. A., Zendarski, N., Lange, K., Quach, J., Molloy, C., Clifford, C. A., & Mulraney, M. (2020). Sleep problems, internalizing and externalizing symptoms, and domains of health-related quality of life: bidirectional associations from early childhood to early adolescence. SLEEP. doi: 10.1093/sleep/zsaa139.

Mitchell, J. A., Morales, K. H., Williamson, A. A., Huffnagle, N., Ludwick, A., Grant, S. F. A., Dinges, D. F., & Zemel, B. A. (2020). Changes in sleep duration and timing during the middle-to-high school transition. Journal of Adolescent Health. doi: 10.1016/.jadohealth.2020.04.024.

Mautone, J.A., Cabello, B., Egan, T.E., Rodrigues, N.P., Davis, M., Figge, C.J., Sass, A.J., & Williamson, A.A. (2020). Exploring predictors of treatment engagement in urban primary care. Clinical Practice in Pediatric Psychology, 8(3): 228-240. doi: 10/1037/cpp0000366.

Daniel., L.C., Childress, J.L, Flannery, J.L., Weaver-Rogers, S., Garcia, W.I., Bonilla-Santiago, G., & Williamson, A.A. (2020). Identifying modifiable factors linking parenting skills and sleep outcomes in racial/ethnic minority children. Journal of Pediatric Psychology, 45(8):867-876. doi: 10.1093/jpepsy/jsaa034.

Williamson, A. A., Mindell, J. A., Hiscock, H., & Quach, J. (2020). Longitudinal sleep problem trajectories are associated with multiple impairments in child well-being. Journal of Child Psychology and Psychiatry, 61(1)):1092-1103. doi: 10.1111/jcpp.13303

*Williamson, A. A., Milaniak, I., Watson, B., Cicalese, O., Fiks, A. G., Power, T. J., Barg, F. K., Beidas, R. S., Mindell, J. A., & Rendle, K. A. (2020). Early childhood sleep intervention in urban primary care: Caregiver and clinician perspectives. Journal of Pediatric Psychology, 45(8): 933-945. doi: 10.1093/jpepsy/jaa024. *Received the 2020 Diane J. Willis Award for Outstanding Article in the Journal of Pediatric Psychology

Williamson, A. A., Meltzer, L. J., & Fiks, A. (2020). A stimulus package to address America’s sleep debt crisis. JAMA Pediatrics, 174(2): 115-116. doi: 10.1001/jamapediatrics.2019.4806. PMID: 3186006.

Leichman, E. S., Gould, R. A., Williamson, A. A., Walters, R. M., & Mindell, J. A. (2020). Effectiveness of an mHealth intervention for infant sleep disturbances. Behavior Therapy, 51(4): 548-558. doi: 10.1016/j.beth.2019.12.011. 

Williamson, A. A., & Mindell, J. A. (2020). Cumulative socio-demographic risk factors and sleep outcomes in early childhood. SLEEP, 43(3):233. doi: 10.1093/sleep/zsz233. PMID: 31555826. 


Mitchell, J., Williamson, A. A., & Fiks, A. (2019). Targeting sleep duration and timing for prevention of adolescent obesity. JAMA Pediatrics,173(11): 1018-1020. doi: 10.1001/jamapediatrics.2019.3080. PMID: 31524928.

Williamson, A. A., Mindell, J. A., Hiscock, H., Quach, J. (2019). Sleep problem trajectories from birth to ages 10-11 years: Impact of early cumulative socio-ecological risks. The Journal of Pediatrics, 215: 229-237. doi: 10.1016/j.jpeds.2019.07.055. PMID: 31564429. PMCID: PMC6878157

Williamson, A. A., Mindell, J. A., Hiscock, H., Quach, J. (2019). Child sleep behaviors and sleep problems from infancy to school-age. Sleep Medicine, 69:5-8. doi: 10.1016/j.sleep.2019.05.003. PMID: 31600659


Mindell, J.A., & Williamson, A. A. (2018). Benefits of a bedtime routine in young children: Sleep, development, and beyond. Sleep Med Rev. 2018 Aug;40:93-108. doi: 10.1016/j.smrv.2017.10.007. Epub 2017 Nov 6.

Puzino, K., Guite, J.W., Moore, M., Lewen, M.O., & Williamson, A.A. (2018). The relationship between parental responses to pain, pain catastrophizing, and adolescent sleep in adolescents with chronic pain. Children’s Health Care, 47: 239-260. doi: 10.1080/02739615.2017.1327358

Fowles, T.R., Masse, J. J., McGoron, L., Beveridge, R. M., Williamson, A. A., Smith, M.A., & Parrish, B. P. (2018). Intensive home-based vs. clinic-based parent-child interaction therapy (PCIT): Comparative effectiveness and attrition in the context of dissemination and implementation. Journal of Child and Family Studies, 27(4), 1115-1129. doi: 10.1007/s10826-017-0958-3.

Grassetti, S. N., Williamson, A. A., Herres, J., Kobak, R., Layne, C. M., Kaplow, J. B., & Pynoos, R. S. (2018). Evaluating referral, screening, and assessment procedures for middle school trauma/grief-focused treatment groups. School Psychology Quarterly, 33(1), 10-20. doi: 10.1037/spq0000231.


Aleman, X., Duryea, S., Guerra, N. G., McEwan, P., Stampini, M., & Williamson, A. A.* (2017). The effects of musical training on child development: a randomized trial of El Sistema in Venezuela. (*authorship is alphabetical). Prevention Science, 18(7), 865-878. doi: 10.1007/s11121-016-0727-3

Herres, J., Williamson, A. A., Kobak, R. R., Layne, C., Kaplow, J., Saltzman, W., & Pynoos, R. (2017). Internalizing and externalizing symptoms moderate treatment response to school-based trauma and grief component therapy for adolescents. School Mental Health, 9(2), 184-193. doi: 10.1007/s12310-016-9201-1

Mindell, J.A., Leichman, E. S., Lee, C., Williamson, A. A., & Walters, R. M. (2017). Implementation of a nightly bedtime routine: How quickly do things improve? Infant Behavior and Development, 49, 220-227. doi: 10.1016/j.infbeh.2017.09.013.

Williamson, A. A., Raglin-Bignall, W. J., Swift, L. E., Hung, A. H., Robins, P. M., Power, T. J. & Mautone, J. A. (2017). Ethical and legal issues in integrated care settings: Case examples from pediatric primary care. Clinical Practice in Pediatric Psychology, 5, 196-208. doi: 10.1037/cpp0000157

Williamson, A. A., Rubens, S., Patrick, K., Moore, M., & Mindell, J. A. (2017). Differences in sleep patterns and problems by race in a clinical sample of Black and White preschoolers. Journal of Clinical Sleep Medicine, 13(11), 1281-1288. doi: 10.5664/jcsm/6798.


Ahn, Y., Williamson, A. A., Seo, H-J., Sadeh, A., & Mindell, J. A. (2016). Sleep patterns among Korean infants and toddlers: A global comparison. Journal of Korean Medical Science, 31, 261-269. doi: 10.3346/jkms.2016.31.2.261

Blechner, M. S., & Williamson, A. A. (2016). Behavioral consequences of obstructive sleep apnea syndrome (OSAS). In DelRosso, L., & Cielo, C. (Eds.) special issue on Pediatric OSAS, Current Problems in Pediatric and Adolescent Health Care, 46, 19-26. doi: 10.1016/j.cppeds.2015.10.007

Mindell, J. A., Sedmak, R., Boyle, J. T., Butler, R., & Williamson, A. A. (2016). Sleep Well! A pilot study of an education campaign to improve sleep of socioeconomically disadvantaged children. Journal of Clinical Sleep Medicine, 12, 1593-1599. doi: 10.5664/jcsm.6338

Rubens, S., Patrick, K. E., Williamson, A. A., Moore, M., & Mindell, J. A. (2016). Individual and socio-demographic factors related to presenting problem and diagnostic impressions at a pediatric sleep clinic. Sleep Medicine, 25, 67-72. doi: 10.1016/j.sleep.2016.06.017

Williamson, A. A., Harrison, R. R., Reader, S., K, & Tynan, D.W. (2016). Parent-child groups for externalizing disorders: Outcomes, socio-demographic moderators, attendance, and attrition in a real-world setting. Evidence-Based Practice in Child and Adolescent Mental Health, 1 (2-3), 126-143, doi: 10.1080/23794925.2016.1227945.

Williamson, A. A., Patrick, K. E., Rubens, S. L., Mindell, J. A., & Moore M. (2016). Pediatric sleep disorders in an outpatient sleep clinic: Clinical needs of children with neurodevelopmental conditions. Clinical Practice in Pediatric Psychology, 4(2),188-199. doi:10.1037/cpp0000135


Grassetti, S. N., Herres, J., Williamson, A. A., Yarger, H. A., Layne, C. M., & Kobak, R. R. (2015). Narrative focus predicts symptom change trajectories in group treatment for traumatized and bereaved adolescents. Journal of Clinical Child & Adolescent Psychology, 44, 933-941. doi: 10.1080/15374416.2014.913249

Lucas-Molina, B., Williamson, A. A., Pulido, R., & Pérez-Albéniz, A. (2015). Effects of teacher-student relationships on peer harassment: A multilevel study. Psychology in the Schools, 52, 298-315. doi:10.1002/pits.21822


Williamson, A. A., Knox, L., Guerra, N. G., & Williams, K. R. (2014). A pilot randomized trial of community-based parent training for immigrant Latina mothers. American Journal of Community Psychology, 53, 47-59. doi: 10.1007/s10464-013-9612-4.

Williamson, A. A., Guerra, N. G., & Tynan, D. W. (2014). The role of health and mental health care providers in gun violence prevention. Clinical Practice in Pediatric Psychology, 2, 88-98. doi: 10.1037/cppp0000055

Lucas-Molina, B., Williamson, A. A., Pulido, R., & Calderón, S. (2014). Adaptation of the Participant Role Scale (PRS) in a Spanish youth sample: Measurement invariance across gender and relationship with sociometric status. Journal of Interpersonal Violence, 29, 2904-2930. doi: 10.1177/0886260514527822

Castro-Olivo, S., Palardy, G., Albeg, L. A., & Williamson, A. A. (2014). Validation of the Coping with Acculturative Stress in American schools (CASAS) scale. Assessment for Effective Intervention, 40, 3-15. doi: 10.1177/1534508413500983


Williamson, A. A., Dierkhising, C. B., & Guerra, N. G. (2013). Brief report: Piloting the Positive Life Changes (PLC) program for at-risk adolescents. Journal of Adolescence, 36, 623-628. doi: 10.1016/j.adolescence.2013.03.004


Guerra, N. G., Williamson, A. A., & Sadek, S. (2012). Youth perspectives on bullying in adolescence. The Prevention Researcher, 19, 14-16. 




Njoroge, W., Williamson, A. A., Mautone, J. A., Robins, P. M., & Benton, T. (2017). Professional competencies and training guidelines for behavioral health providers in pediatric primary care. Child and Adolescent Psychiatric Clinics of North America, 26, 717-731. doi: 10.1016/j.chc.2017.06.002.


Meltzer, L. J., Thomas, J. H., & Williamson, A. A. (2016). Sleep Disturbances. In R. J. R. Levesque (Ed.), Encyclopedia of Adolescence (pp.1-12). New York: Springer. doi: 10.1007/978-3-319-32132-5_98-2

Williamson, A. A., Guerra, N. G., & Shadowen, N. L. (2016). From school bullying to dating violence: Coercive developmental processes and implications for intervention. In T. Dishion & J. Snyder (Eds.) The Oxford Handbook on Coercive Dynamics in Close Relationships (pp. 300-312). New York: Oxford University Press. doi:10.1093/oxfordhb/9780199324552.013.22

Williamson, A. A., Moore, M., & DelRosso, L. (2016). A 4-year-old child with paroxysmal nocturnal events. In American Academy of Sleep Medicine (Ed.), Case Book of Sleep Medicine (pp. 425-429). Darien, IL: American Academy of Sleep Medicine.


Williamson, A. A., Modecki, K. L., & Guerra, N. G. (2015). Social-emotional learning programs in high school. In J. A. Durlak, C. Domitrovich, R. P. Weissberg, & T. P. Gullotta (Eds.). Handbook of Social and Emotional Learning (SEL): Research and Practice (pp. 181-196). New York: Guildford Press.


Williamson, A. A., Guerra, N. G., & Lucas-Molina, B. L. (2013). What can high schools do to prevent cyber bullying? In R. Hanewald (Ed.), From Cyber Bullying to Cyber Safety: Issues and Approaches in Educational Contexts (pp. 225-243). New York, NY: Nova Science Publishers.

Awards and Honors

2020, Diane J. Willis Award for Outstanding Article in the Journal of Pediatric Psychology
2020, Society for Pediatric Research Fellow
2020, Mixed Methods Research Training Program Scholar, NIH/Johns Hopkins University
2019-2021, Loan Repayment Program Award Renewal, Eunice Kennedy Shriver National Institute of Child Health and Human Development
2018-2023, K23 Career Development Award, National Institute of Child Health and Human Development
2018-2019, Career Development Award, Sleep Research Society Foundation
2017, Early Investigator Merit-Based Travel Award, Sleep Research Network
2017, Young Investigator Research Forum, American Academy of Sleep Medicine
2017, Implementation Science Institute Scholarship, University of Pennsylvania
2016 and 2017, Student Merit Award, Sleep Research Society
2015-2016, Fellowship, Leaders of Education in Neurodevelopmental Disabilities, CHOP
2014 and 2015, Professional Development Award, University of Delaware
2014-2015, Dissertation Fellowship, University of Delaware
2015, Travel Award, Leaders of Education in Neurodevelopmental Disabilities, Children's Hospital of Philadelphia

Editorial and Academic Positions

Editorial Positions

Associate Editor, Sleep Health: Journal of the National Sleep Foundation

Ad Hoc Reviewer

Clinical Practice in Pediatric Psychology
Journal of  Child and Family Studies
Journal of Clinical Psychology in Medical Settings
Journal of  Developmental Psychology
Journal of Pediatrics and Child Health
Health Psychology
School Mental Health
Journal of Research on Adolescence
Training & Education in Professional Psychology

Leadership and Memberships

Memberships in Professional Organizations

American Academy of Sleep Medicine
Society for Pediatric Psychology and Integrated Primary Care Special Interest Group
Society of Clinical Child and Adolescent Psychology 
Sleep Research Society
Sleep Expert, Pediatric Sleep Council
Board of Directors, Beds for Kids Program