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Sigan L. Hartley

D-Index & Metrics

Psychology

D-Index
38
Citations
6881
World Ranking
8813
National Ranking
4689

Sigan L. Hartley 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 Sigan L. Hartley 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: 109 publications — 26th percentile

26% of scientists in this discipline score the same or lower.

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

Sigan L. Hartley 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 Sigan L. Hartley 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: 38 D-Index — 24th percentile

24% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2018 - Fellow of the American Psychological Association (APA)

Overview

Sigan L. Hartley is affiliated with the University of Wisconsin-Madison in the United States and has contributed extensively to research in medicine, with a primary focus on Down syndrome, dementia, and aging-related conditions. Their work spans multiple subfields including Public Health, Environmental and Occupational Health, Psychiatry and Mental Health, Geriatrics and Gerontology, Epidemiology, and Clinical Psychology.

The research topics most frequently addressed in Hartley's work include:

  • Down syndrome and intellectual disability research
  • Frailty in Older Adults
  • Dementia and Cognitive Impairment Research
  • Chronic Disease Management Strategies
  • Family and Disability Support Research
  • Autism Spectrum Disorder Research
  • Child and Adolescent Psychosocial and Emotional Development

Hartley has published in several prominent journals, with the most frequent venues being:

  • Alzheimer's & Dementia
  • Alzheimer's & Dementia Diagnosis Assessment & Disease Monitoring
  • The Lancet Neurology
  • Journal of Alzheimer's Disease
  • Journal of Intellectual Disability Research

Recent papers by Hartley highlight significant research into Alzheimer's disease in relation to Down syndrome and include:

  • "Alzheimer's disease associated with Down syndrome: a genetic form of dementia" (2021, The Lancet Neurology)
  • "The Alzheimer's Biomarker Consortium-Down Syndrome: Rationale and methodology" (2020, Alzheimer's & Dementia Diagnosis Assessment & Disease Monitoring)
  • "Further understanding the connection between Alzheimer's disease and Down syndrome" (2020, Alzheimer's & Dementia)
  • "Comparison of amyloid burden in individuals with Down syndrome versus autosomal dominant Alzheimer's disease: a cross-sectional study" (2022, The Lancet Neurology)
  • "Characterizing the emergence of amyloid and tau burden in Down syndrome" (2023, Alzheimer's & Dementia)

Among frequent collaborators, Hartley has worked notably with Benjamin L. Handen, Shahid Zaman, Bradley T. Christian, Beau M. Ances, and Charles M. Laymon.

In terms of recognition, Hartley was named a Fellow of the American Psychological Association (APA) in 2018.

Best Publications

  • The relative risk and timing of divorce in families of children with an autism spectrum disorder.

    Sigan L. Hartley;Erin T. Barker;Marsha Mailick Seltzer;Frank Floyd

  • Neural Signals for the Detection of Unintentional Race Bias

    David M. Amodio;Eddie Harmon-Jones;Patricia G. Devine;John J. Curtin

  • Prevalence and Risk Factors of Maladaptive Behaviour in Young Children with Autistic Disorder.

    S. L. Hartley;D. M. Sikora;R. McCoy

  • Sex Differences in Autism Spectrum Disorder: An Examination of Developmental Functioning, Autistic Symptoms, and Coexisting Behavior Problems in Toddlers

    Sigan L. Hartley;Darryn M. Sikora

  • Trajectories of emotional well-being in mothers of adolescents and adults with autism.

    Erin T. Barker;Sigan L. Hartley;Marsha Mailick Seltzer;Frank J. Floyd

  • A review of the reliability and validity of Likert-type scales for people with intellectual disability.

    S. L. Hartley;W. E. MacLean

  • Marital Satisfaction and Parenting Experiences of Mothers and Fathers of Adolescents and Adults With Autism

    Sigan L. Hartley;Erin T. Barker;Marsha Mailick Seltzer;Jan S. Greenberg

  • Does Parent Report of Behavior Differ Across ADOS-G Classifications: Analysis of Scores from the CBCL and GARS

    Darryn M. Sikora;Trevor A. Hall;Sigan L. Hartley;Aimee E. Gerrard-Morris

  • Transactional Relations Between Parenting Stress and Child Autism Symptoms and Behavior Problems

    Geovanna Rodriguez;Sigan L. Hartley;Daniel Bolt

  • Outcome Measures for Clinical Trials in Down Syndrome.

    Anna J Esbensen;Stephen R Hooper;Deborah Fidler;Sigan L Hartley

  • Maladaptive behaviors and risk factors among the genetic subtypes of prader-willi syndrome

    Sigan L. Hartley;William E. MacLean;Merlin G. Butler;Jennifer Zarcone

  • Psychological Well-being in Fathers of Adolescents and Young Adults with Down Syndrome, Fragile X Syndrome, and Autism.

    Sigan L. Hartley;Marsha Mailick Seltzer;Lara Head;Leonard J Abbeduto

  • Marital satisfaction and life circumstances of grown children with autism across 7 years.

    Sigan L. Hartley;Erin T. Barker;Jason K. Baker;Marsha Mailick Seltzer

  • Exploring the Adult Life of Men and Women With Fragile X Syndrome: Results From a National Survey

    Sigan L . Hartley;Marsha Mailick Seltzer;Melissa Raspa;Murrey Olmstead

  • Support Needs of Fathers and Mothers of Children and Adolescents with Autism Spectrum Disorder

    Sigan L. Hartley;Haley M. Schultz

  • Which DSM-IV-TR criteria best differentiate high-functioning autism spectrum disorder from ADHD and anxiety disorders in older children?

    Sigan L. Hartley;Darryn M. Sikora

  • The Alzheimer's Biomarker Consortium‐Down Syndrome: Rationale and methodology

    Benjamin L Handen;Ira T Lott;Bradley T Christian;Nicole Schupf

  • Spillover of Marital Interactions and Parenting Stress in Families of Children With Autism Spectrum Disorder

    Sigan L Hartley;Lauren M Papp;Daniel Bolt

  • Cognitive functioning in relation to brain amyloid-β in healthy adults with Down syndrome.

    Sigan L. Hartley;Benjamin L. Handen;Darlynne A. Devenny;Regina Hardison

  • Further understanding the connection between Alzheimer's disease and Down syndrome.

    Heather M Snyder;Lisa J Bain;Adam M Brickman;Maria C Carrillo

  • Perceptions of stress and coping strategies among adults with mild mental retardation: insight into psychological distress.

    Sigan L. Hartley;William E. MacLean

  • Phenotype of FOXP2 Haploinsufficiency in a Mother and Son

    Gregory M. Rice;Gordana Raca;Kathy J. Jakielski;Jennifer J. Laffin

Frequent Co-Authors

Benjamin L. Handen
Benjamin L. Handen University of Pittsburgh
William E. Klunk
William E. Klunk University of Pittsburgh
Bradley T. Christian
Bradley T. Christian University of Wisconsin–Madison
Sterling C. Johnson
Sterling C. Johnson University of Wisconsin–Madison
Chester A. Mathis
Chester A. Mathis University of Pittsburgh
Julie C. Price
Julie C. Price Harvard University
Beau M. Ances
Beau M. Ances Washington University in St. Louis
Marsha Mailick Seltzer
Marsha Mailick Seltzer University of Wisconsin–Madison
Anna J. Esbensen
Anna J. Esbensen Cincinnati Children's Hospital Medical Center
Jan S. Greenberg
Jan S. Greenberg University of Wisconsin–Madison

External Links

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Best Scientists Citing Sigan L. Hartley

David M. Amodio

David M. Amodio

University of Amsterdam

Publications: 34

Leonard J Abbeduto

Leonard J Abbeduto

University of California, Davis

Publications: 30

Johnny L. Matson

Johnny L. Matson

Louisiana State University

Publications: 29

Jan S. Greenberg

Jan S. Greenberg

University of Wisconsin–Madison

Publications: 23

Elizabeth Head

Elizabeth Head

University of California, Irvine

Publications: 22

Elizabeth Berry-Kravis

Elizabeth Berry-Kravis

Rush University Medical Center

Publications: 18

Richard P. Hastings

Richard P. Hastings

University of Birmingham

Publications: 17

Benjamin L. Handen

Benjamin L. Handen

University of Pittsburgh

Publications: 17

Anthony J. Holland

Anthony J. Holland

University of Cambridge

Publications: 16

Bruce D. Bartholow

Bruce D. Bartholow

University of Missouri

Publications: 16

Anna J. Esbensen

Anna J. Esbensen

Cincinnati Children's Hospital Medical Center

Publications: 15

Jinkuk Hong

Jinkuk Hong

University of Wisconsin–Madison

Publications: 15

Randi J Hagerman

Randi J Hagerman

University of California, Davis

Publications: 15

Eddie Harmon-Jones

Eddie Harmon-Jones

University of New South Wales

Publications: 15

Simon E. Fisher

Simon E. Fisher

Max Planck Society

Publications: 14

Torbjörn Falkmer

Torbjörn Falkmer

Curtin University

Publications: 14

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