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Michael Gradisar, Ph.D.

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Michael Gradisar, Ph.D.

Head of Sleep Science
Sleep Cycle AB
Sleep Cycle

Director and Clinical Psychologist
Child & Adolescent Sleep Clinic

Adelaide, Australia

Dr. Michael Gradisar is a Professor and Director and Clinical Psychologist at the Child & Adolescent Sleep Clinic at WINK Sleep in Australia, and the Head of Sleep Science at Sleep Cycle in Sweden. Dr. Gradisar has specialized in the treatment of pediatric sleep problems since 2006. He has provided training to over 420 psychologists throughout Australia on the treatment of pediatric sleep disorders, and published several research studies evaluating the treatment of insomnia and circadian rhythm disorders in children, adolescents and adults. In all, Dr. Gradisar has over 100 publications in peer-reviewed journals, has authored several book chapters, and has presented on sleep-related research and intervention internationally.


Pesonen, A.K., Gradisar, M., Kuula, L., Short, M., Merikanto, I., Tark, R., Raikkonen, K., & Lahti, J. (2018). REM fragmentation associated with depressive symptoms and genetic risk for depression in a community-based sample of adolescents. Journal of Affective Disorders, 245, 757-763.

Heath, M., Johnston, A., Dohnt, H., Short, M.A., & Gradisar, M. (2018). The role of pre-sleep cognitions in adolescent sleep-onset problems. Sleep Medicine, 46, 117-121.

Cooney, M., Short, M.A., & Gradisar, M. (2018). An open trial of bedtime fading for sleep disturbances in preschool children: A parent group education approach. Sleep Medicine, 46, 98-106.

Richardson, C., Cain, N., Bartel, K., Micic, G., Maddock, B., & Gradisar, M. (2018). A randomised controlled trial of bright light therapy and morning activity for adolescents and young adults with Delayed Sleep-Wake Phase Disorder. Sleep Medicine, 45, 44-48.

Bartel, K., Huang, I., Maddock, B., & Gradisar, M. (2018). Brief school-based interventions to assist adolescents’ sleep onset latency: Comparing mindfulness and constructive worry versus controls. Journal of Sleep Research, 27, e12668.

Kuula-Paavola, L., Pesonen, A, Merikanto I, Gradisar M, Lahti J, Heinonen K, Kajantie E, Raikkonen K. (2018). Development of late circadian preference: Sleep timing from childhood to late adolescence. Journal of Pediatrics, 194, 182-189.

Hale, L., Kirschen G.W., LeBourgeois, M.K., Gradisar, M., Garrison M.M., Montgomery-Downs, H., Kirschen, H., McHale S.M., Chang, A.M., & Buxton, O.M. (2018). Youth screen media habits and sleep: Sleep-friendly screen behavior recommendations for clinicians, educators, and parents. Child and Adolescent Psychiatric Clinics, 27, 229-245.

Bartel, K., Scheeren, R., & Gradisar, M. (2018). Altering adolescents’ pre-bedtime phone use to achieve better sleep health. Health Communication, 1-7.

Smith L, King DL, Richardson C, Roane B, & Gradisar, M. (2017). Mechanisms influencing older adolescents’ bedtimes during videogaming: the roles of game difficulty and flow. Sleep Medicine, 39, 70-76.

Bartel K, van Maanen A, Cassoff J, Friborg O, Meijer, A.M. Oort F, Williamson P, Gruber R, Knauper B, & Gradisar, M. (2017). The short and long of adolescent sleep: The unique impact of day length. Sleep Medicine, 38, 31-36.

Gradisar, M.S., Jackson, K., Spurrier, N.J., Gibson, J., Whitham, J.N., Sved-Williams, A., et al. (2016). Behavioral interventions for infant sleep problems: A randomized controlled trial. Pediatrics, 137(6) pp. Art: e20151486.

Micic, G., Lovato, N., Gradisar, M.S., Ferguson, S., Burgess, H.J. and Lack, L.C. (2016). The etiology of delayed sleep phase disorder. Sleep Medicine Reviews, 27 pp. 29-38.

Richardson, C.E., Gradisar, M.S. and Barbero, S.C. (2016). Are cognitive “insomnia” processes involved in the development and maintenance of delayed sleep wake phase disorder? Sleep Medicine Reviews, 26 pp. 1-8.

Micic, G., Lovato, N., Gradisar, M.S., Burgess, H.J., Ferguson, S., Kennaway, D.J., et al. (2015). Nocturnal melatonin profiles in patients with Delayed Sleep-Wake Phase Disorder and control sleepers. Journal of Biological Rhythms, 30(5) pp. 437-448.

Bonnar, D.K. & Gradisar, M.S. (2015). Caffeine and adolescent sleep: A systematic review. Journal of Caffeine Research, 5(3) pp. 105-114.

Smith, L.J., Gradisar, M.S. and King, D.L. (2015). Parental influences on adolescent video game play: A study of accessibility, rules, limit-setting, and cybersafety. Cyberpsychology, Behavior, and Social Networking, 18(5) pp. 273-279.

Reynolds, K.C., Gradisar, M.S. and Alfano, C.A. (2015). Sleep in children and adolescents with Obsessive Compulsive Disorder. Sleep Medicine Clinics, 10(2) pp. 133-141.

Reynolds, C., Gradisar, M., Afrin, K., Perry, A., Wolfe, J., & Short, M.A. (2015). Adolescents who perceive fewer consequences of risk-taking choose to switch off games later at night. Acta Paediatrica. DOI:10.1111/apa.12935 (IF=1.84)

Bartel, K., Gradisar, M., & Williamson, P. (2015). Protective and risk factors for adolescent sleep: A meta-analytic review. Sleep Medicine Review. DOI:

Reynolds, K., Alfano, C.A., & Gradisar, M. (2015). Sleep in children and adolescents with Obsessive Compulsive Disorder. Sleep Medicine Clinics. DOI:

Richardson, C., Gradisar, M., & Pulford, A. (2015). The development of insomnia or the plasticity of good sleep? A preliminary study of acute changes in sleep and insomnia states resulting from an analogue trauma. Behavioral Sleep Medicine, 13, 19-35.

Bonnar, D., Gradisar, M., Moseley L., Coughlin A-M., Cain, N., & Short, M.A. (2015). Evaluation of novel school-based sleep interventions: Does adjunct bright light therapy and parental involvement improve treatment outcomes? Sleep Health, 1, 66-74.

Hiller, R.M., Johnston, A., Dohnt, H., Lovato, N., & Gradisar, M. (2015). Assessing cognitive processes related to insomnia: a review and measurement guide for Harvey’s cognitive model of insomnia. Sleep Medicine Reviews, 23, 46-53.

Gradisar, M., Alfano, C.A., & Harvey, A.G. (2014). A clinician’s quick guide of evidence based approaches: Paediatric sleep disorders. Clinical Psychologist, 18, 133-4.

Wolfe, J., Kar, K., Perry, A., Reynolds, C., Gradisar, M., & Short, M.A. (2014). Single night video game use leads to sleep loss and attention deficits in older adolescents. Journal of Adolescence, 37, 1003-9.

Richdale, A., Baker, E., Short, M.A., & Gradisar, M. (2014). The role of insomnia, pre-sleep arousal, and psychopathology symptoms in daytime impairment in adolescents with high-functioning autism spectrum disorder. Sleep Medicine, 15, 1082-8.

van Maanen, A., Dewald-Kaufmann, J.F., Oort, F.J., de Bruin, E.J., Smits, M.G., Short, M.A., Gradisar, M., Kerkhof, G.A., & Meijer, A.M. (in press, accepted 11.4.14). Measuring sleep deficit through self-report: Development and validation of the Sleep Reduction Screening Questionnaire – Short Form. Child and Youth Care Forum. DOI: 10.1007/s10566-014-9256-z

Lovato, N., & Gradisar, M. (2014). A meta-analysis and model of the relationship between sleep and depression in adolescents: Recommendations for future research and clinical practice. Sleep Medicine Reviews, 18, 521-9.

Friborg, O., Rosenvinge, J. H., Wynn, R. & Gradisar, M. (2014). Sleep timing, chronotype, mood and behavior at an Arctic Latitude (69°). Sleep Medicine, 15, 798-807.

Gradisar, M., Smits, M., Bjorvatn, B. (2014). Assessment and treatment of Delayed Sleep Phase Disorder in adolescents: Recent innovations and cautions. Sleep Medicine Clinics, 9, 199-210.

Hiller, R., Lovato, N., Gradisar, M., Oliver, M., & Slater, A. (2014). Trying to fall sleep whilst catastrophising: What sleep-disordered adolescents think and feel. Sleep Medicine, 15, 96-103.