World's Best Scientists 2026 revealed!

D-Index & Metrics

Psychology

D-Index
77
Citations
19888
World Ranking
1663
National Ranking
82

Helen Leonard publication distribution in Psychology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Psychology in 2026. The highlighted bar marks where Helen Leonard sits on this spectrum.

31–40 publications: 6 scientists 41–50 publications: 52 scientists 51–60 publications: 138 scientists 61–70 publications: 299 scientists 71–80 publications: 461 scientists 81–90 publications: 605 scientists 91–100 publications: 713 scientists 101–110 publications: 736 scientists 111–120 publications: 686 scientists 121–130 publications: 670 scientists 131–140 publications: 644 scientists 141–150 publications: 597 scientists 151–160 publications: 576 scientists 161–170 publications: 477 scientists 171–180 publications: 450 scientists 181–190 publications: 397 scientists 191–200 publications: 343 scientists 201–210 publications: 328 scientists 211–220 publications: 313 scientists 221–230 publications: 283 scientists 231–240 publications: 226 scientists 241–250 publications: 196 scientists 251–260 publications: 201 scientists 261–270 publications: 171 scientists 271–280 publications: 151 scientists 281–290 publications: 139 scientists 291–300 publications: 113 scientists 301–310 publications: 102 scientists 311–320 publications: 100 scientists 321–330 publications: 76 scientists 331–340 publications: 92 scientists 341–350 publications: 85 scientists 351–360 publications: 69 scientists 361–370 publications: 71 scientists 371–380 publications: 63 scientists 381–390 publications: 58 scientists 391–400 publications: 57 scientists 401–410 publications: 43 scientists 411–420 publications: 33 scientists 421–430 publications: 50 scientists 431–440 publications: 41 scientists 441–450 publications: 32 scientists 451–460 publications: 27 scientists 461–470 publications: 28 scientists 471–480 publications: 25 scientists 481–490 publications: 28 scientists 491–500 publications: 20 scientists 501–510 publications: 23 scientists 511–520 publications: 26 scientists 521–530 publications: 17 scientists 531–540 publications: 21 scientists 541–550 publications: 14 scientists 551–560 publications: 16 scientists 561–570 publications: 10 scientists 571–580 publications: 22 scientists 581–590 publications: 9 scientists 591–600 publications: 14 scientists 601–610 publications: 9 scientists 611–620 publications: 11 scientists 621–630 publications: 4 scientists 631–640 publications: 7 scientists 641–650 publications: 5 scientists 651–660 publications: 10 scientists 661–670 publications: 8 scientists 671–680 publications: 8 scientists 681–690 publications: 4 scientists 691–700 publications: 3 scientists 701–704 publications: 4 scientists 705+ publications: 100 scientists
31 publications 705+

This scientist: 303 publications — 88th percentile

88% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 705 publications or more.

Helen Leonard D-index placement in Psychology in 2026

The chart shows the D-index (discipline H-index) distribution of Psychology scientists ranked by Research.com in 2026. The highlighted bar marks where Helen Leonard sits on this spectrum.

30–31 D-Index: 398 scientists 32–33 D-Index: 702 scientists 34–35 D-Index: 671 scientists 36–37 D-Index: 659 scientists 38–39 D-Index: 641 scientists 40–41 D-Index: 671 scientists 42–43 D-Index: 617 scientists 44–45 D-Index: 558 scientists 46–47 D-Index: 495 scientists 48–49 D-Index: 487 scientists 50–51 D-Index: 445 scientists 52–53 D-Index: 390 scientists 54–55 D-Index: 408 scientists 56–57 D-Index: 345 scientists 58–59 D-Index: 325 scientists 60–61 D-Index: 321 scientists 62–63 D-Index: 248 scientists 64–65 D-Index: 290 scientists 66–67 D-Index: 218 scientists 68–69 D-Index: 219 scientists 70–71 D-Index: 215 scientists 72–73 D-Index: 183 scientists 74–75 D-Index: 169 scientists 76–77 D-Index: 132 scientists 78–79 D-Index: 137 scientists 80–81 D-Index: 120 scientists 82–83 D-Index: 112 scientists 84–85 D-Index: 86 scientists 86–87 D-Index: 101 scientists 88–89 D-Index: 83 scientists 90–91 D-Index: 77 scientists 92–93 D-Index: 70 scientists 94–95 D-Index: 78 scientists 96–97 D-Index: 58 scientists 98–99 D-Index: 53 scientists 100–101 D-Index: 57 scientists 102–103 D-Index: 48 scientists 104–105 D-Index: 53 scientists 106–107 D-Index: 46 scientists 108–109 D-Index: 24 scientists 110–111 D-Index: 35 scientists 112–113 D-Index: 27 scientists 114–115 D-Index: 32 scientists 116–117 D-Index: 31 scientists 118–119 D-Index: 22 scientists 120–121 D-Index: 16 scientists 122–123 D-Index: 24 scientists 124–125 D-Index: 18 scientists 126–127 D-Index: 11 scientists 128–129 D-Index: 19 scientists 130–131 D-Index: 10 scientists 132–133 D-Index: 16 scientists 134–135 D-Index: 10 scientists 136–137 D-Index: 12 scientists 138–139 D-Index: 8 scientists 140–141 D-Index: 5 scientists 142–143 D-Index: 12 scientists 144+ D-Index: 98 scientists
30 D-Index 144+

This scientist: 77 D-Index — 86th percentile

86% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 144 D-Index or more.

Overview

Helen Leonard is affiliated with the Telethon Kids Institute in Australia. Their research primarily focuses on genetics and neurodevelopmental disorders, as reflected in a significant publication record within the fields of biochemistry, genetics and molecular biology, and medicine. The scientist's subfield expertise includes genetics, clinical psychology, cognitive neuroscience, psychiatry and mental health, and pediatrics, perinatology and child health.

Helen Leonard's research topics include:

  • Genetics and neurodevelopmental disorders
  • Family and disability support research
  • Autism spectrum disorder research
  • Genomic variations and chromosomal abnormalities
  • Adolescent and pediatric healthcare
  • Childhood cancer survivors' quality of life
  • Cleft lip and palate research

Frequent publication venues where Leonard has contributed include:

  • Developmental Medicine & Child Neurology
  • Journal of Child Neurology
  • The Journal of Pediatrics
  • American Journal of Medical Genetics Part A
  • Orphanet Journal of Rare Diseases

Notable recent publications authored or co-authored by Leonard feature various aspects of intellectual disability, neurogenetic disorders, and pediatrics. Examples include:

  • Prevalence estimates of mental health problems in children and adolescents with intellectual disability: A systematic review and meta-analysis (2020), published in Australian & New Zealand Journal of Psychiatry
  • CDKL5 deficiency disorder: clinical features, diagnosis, and management (2022), published in The Lancet Neurology
  • Functioning, participation, and quality of life in children with intellectual disability: an observational study (2020), published in Developmental Medicine & Child Neurology
  • Systematic Review and Meta-analysis: Mental Health in Children With Neurogenetic Disorders Associated With Intellectual Disability (2020), published in Journal of the American Academy of Child & Adolescent Psychiatry
  • Stillbirth risk prediction using machine learning for a large cohort of births from Western Australia, 1980-2015 (2020), published in Scientific Reports

Helen Leonard has collaborated frequently with other researchers including Jenny Downs, Kingsley Wong, Peter Jacoby, Tim A. Benke, and Scott Demarest.

Best Publications

  • Rett syndrome: Revised diagnostic criteria and nomenclature

    Jeffrey L. Neul;Walter E. Kaufmann;Daniel G. Glaze;John Christodoulou

  • The epidemiology of mental retardation: Challenges and opportunities in the new millennium

    Helen Leonard;Xingyan Wen

  • Association of Genetic and Environmental Factors With Autism in a 5-Country Cohort.

    Dan Bai;Benjamin Hon Kei Yip;Benjamin Hon Kei Yip;Gayle C. Windham;Andre Sourander

  • Mutations of CDKL5 Cause a Severe Neurodevelopmental Disorder with Infantile Spasms and Mental Retardation

    Linda S. Weaving;John Christodoulou;John Christodoulou;Sarah L. Williamson;Sarah L. Williamson;Kathie L. Friend

  • Intellectual disability co-occurring with schizophrenia and other psychiatric illness: population-based study

    Vera A. Morgan;Helen Leonard;Jenny Bourke;Assen Jablensky

  • Rett Syndrome in Australia: A Review of the Epidemiology

    Crystal L. Laurvick;Nicholas de Klerk;Carol Bower;John Christodoulou

  • The increasing prevalence of reported diagnoses of childhood psychiatric disorders: a descriptive multinational comparison

    Hjördis O. Atladottir;David Gyllenberg;David Gyllenberg;Amanda Langridge;Sven Sandin

  • The CDKL5 disorder is an independent clinical entity associated with early-onset encephalopathy

    Stephanie Fehr;Meredith Wilson;Meredith Wilson;Jennepher Downs;Jennepher Downs;Simon Williams

  • Autism risk associated with parental age and with increasing difference in age between the parents

    S Sandin;D Schendel;D Schendel;P Magnusson;C Hultman

  • Investigating genotype-phenotype relationships in Rett syndrome using an international data set.

    A. Bebbington;A. Anderson;D. Ravine;S. Fyfe

  • Cyclin-Dependent Kinase-Like 5 Deficiency Disorder: Clinical Review.

    Heather E. Olson;Scott T. Demarest;Elia M. Pestana-Knight;Lindsay C. Swanson

  • Autism spectrum disorders in young children: effect of changes in diagnostic practices

    Natasha Nassar;Glenys Dixon;Jenny Bourke;Carol Bower

  • The impact of having a sibling with an intellectual disability: parental perspectives in two disorders.

    S. Mulroy;L. Robertson;K. Aiberti;Helen Leonard

  • Clinical and biological progress over 50 years in Rett syndrome

    Helen Leonard;Stuart Cobb;Jenny Downs

  • Australian children living with rare diseases: experiences of diagnosis and perceived consequences of diagnostic delays

    Yvonne Zurynski;Marie Deverell;Troy Dalkeith;Sandra Johnson

  • Maternal Conditions and Perinatal Characteristics Associated with Autism Spectrum Disorder and Intellectual Disability

    Amanda T. Langridge;Emma J. Glasson;Natasha Nassar;Natasha Nassar;Peter Jacoby

  • Prevalence estimates of mental health problems in children and adolescents with intellectual disability: A systematic review and meta-analysis.

    Nicholas Buckley;Emma J Glasson;Wai Chen;Amy Epstein

  • Rare childhood diseases: how should we respond?

    Yvonne A Zurynski;Katie Frith;Helen Leonard;Elizabeth J Elliott;Elizabeth J Elliott

  • Young adults with intellectual disability transitioning from school to post-school: a literature review framed within the ICF.

    Kitty-Rose Foley;P Dyke;S Girdler;J Bourke

  • Maltreatment Risk Among Children With Disabilities.

    Miriam J Maclean;Scott Sims;Carol Bower;Helen Leonard

  • Family functioning in families with a child with Down syndrome: a mixed methods approach

    Kate Povee;Lynne Roberts;J. Bourke;H. Leonard

  • Trends in the Diagnosis of Rett Syndrome in Australia

    Stephanie Fehr;Ami Bebbington;Natasha Nassar;Jenny Downs

  • Effects of MECP2 mutation type, location and X-inactivation in modulating rett syndrome phenotype

    Linda S. Weaving;Sarah L. Williamson;Bruce Bennetts;Bruce Bennetts;Mark Davis

Frequent Co-Authors

John Christodoulou
John Christodoulou University of Melbourne
Nicholas de Klerk
Nicholas de Klerk University of Western Australia
Carol Bower
Carol Bower Telethon Kids Institute
Sonya Girdler
Sonya Girdler Curtin University
Mika Gissler
Mika Gissler Finnish Institute for Health and Welfare
Andrew J. O. Whitehouse
Andrew J. O. Whitehouse Telethon Kids Institute
Fiona J. Stanley
Fiona J. Stanley Telethon Kids Institute
Katrina Williams
Katrina Williams University of Melbourne
Abraham Reichenberg
Abraham Reichenberg Icahn School of Medicine at Mount Sinai
David Forbes
David Forbes University of Melbourne

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Related Online Degrees & Career Pathways

Psychology offers a versatile foundation for various careers, with online degree programs making this field even more accessible. Many students pursue psychology degrees to enter mental health, counseling, or social work, and understanding state-specific licensing requirements is essential.

For example, the social worker education requirements in Arizona highlight the need for a minimum of a bachelor’s degree in social work, with additional requirements for clinical roles. Similarly, the Arkansas education requirements for social workers note the importance of accredited programs and state licensure.

Requirements can vary significantly; in states like California, the social worker degree requirements in California emphasize advanced degrees for clinical practice. Meanwhile, the social worker education requirements in Colorado include coursework and supervised experience as part of the path to licensure.

As career pathways broaden with online degrees, it’s important to carefully review each state’s specific criteria. This careful planning ensures a seamless transition from education to a rewarding career in psychology or social work.

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