World's Best Scientists 2026 revealed!
Leonard L. Howell

Leonard L. Howell

D-Index & Metrics

Psychology

D-Index
36
Citations
4420
World Ranking
9617
National Ranking
5074

Leonard L. Howell 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 Leonard L. Howell 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: 156 publications — 52nd percentile

52% of scientists in this discipline score the same or lower.

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

Leonard L. Howell 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 Leonard L. Howell 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: 36 D-Index — 19th percentile

19% of scientists in this discipline score the same or lower.

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

Overview

Leonard L. Howell is affiliated with Emory University in the United States and specializes primarily in the field of Medicine. Their research contributions span several subfields, including Epidemiology, Infectious Diseases, Public Health, Environmental and Occupational Health, General Health Professions, and Clinical Biochemistry.

Their recent scholarly work encompasses a range of topics centered on infectious diseases, antimicrobial resistance, and clinical management. The main topics covered in their publications include:

  • Infective Endocarditis Diagnosis and Management
  • Antimicrobial Resistance in Staphylococcus
  • Bacterial Identification and Susceptibility Testing
  • Streptococcal Infections and Treatments
  • Musculoskeletal Pain and Rehabilitation
  • Health Policy Implementation Science
  • Interprofessional Education and Collaboration

Several recent papers reflect Leonard L. Howell's research interests, such as:

  • Management of Staphylococcus aureus Bacteremia (2025), published in JAMA
  • Sharing SRP data to reduce environmentally associated disease and promote transdisciplinary research (2020), published in Reviews on Environmental Health
  • Use of Implementation Strategies to Promote the Uptake of Knee Osteoarthritis Practice Guidelines and Improve Patient Outcomes: A Systematic Review (2024), published in Arthritis Care & Research
  • Oral Versus Intravenous Antibiotic Therapy for Staphylococcus aureus Bacteremia or Endocarditis: A Systematic Review and Meta-Analysis of Randomized, Controlled Trials (2024), published in Clinical Infectious Diseases
  • Surgical Treatment of Severe Heterotopic Ossification After Total Hip Arthroplasty Over the Last 25 Years: A Systematic Review of the Literature and a New Case Series (2024), published in The Journal of Arthroplasty

Their frequent publication venues include:

  • Clinical Infectious Diseases
  • Reviews on Environmental Health
  • JAMA
  • Arthritis Care & Research
  • The Journal of Arthroplasty

Leonard L. Howell often collaborates with a consistent group of coauthors who have contributed to multiple publications, including:

  • Thomas L Holland
  • Tsai-Wei Wang
  • Abigail Rader
  • Karen D. Barton
  • Helen W. Boucher

Best Publications

  • Monoamine transporters and psychostimulant addiction.

    Leonard L. Howell;Heather L. Kimmel

  • Chronic Interferon- α Decreases Dopamine 2 Receptor Binding and Striatal Dopamine Release in Association with Anhedonia-Like Behavior in Nonhuman Primates

    Jennifer C Felger;Jiyoung Mun;Heather L Kimmel;Heather L Kimmel;Jonathon A Nye

  • Serotonergic modulation of the behavioral effects of cocaine in the squirrel monkey.

    L L Howell;L D Byrd

  • The Dopamine Transporter and Cocaine Medication Development: Drug Self-Administration in Nonhuman Primates

    Leonard L. Howell;Kristin M. Wilcox

  • 3,4-Methylenedioxymethamphetamine facilitates fear extinction learning

    M B Young;R Andero;Kerry Ressler;Kerry Ressler;Leonard Howell

  • Characterization of the effects of cocaine and GBR 12909, a dopamine uptake inhibitor, on behavior in the squirrel monkey.

    L L Howell;L D Byrd

  • Serotonergic Attenuation of the Reinforcing and Neurochemical Effects of Cocaine in Squirrel Monkeys

    Paul W. Czoty;Brett C. Ginsburg;Leonard L. Howell

  • Dopamine transporter-related effects of modafinil in rhesus monkeys

    Monica L. Andersen;Monica L. Andersen;Eileen Kessler;Kevin S. Murnane;Jessica C. McClung

  • EFFECTS OF COMBINED DOPAMINE AND SEROTONIN TRANSPORTER INHIBITORS ON COCAINE SELF-ADMINISTRATION IN RHESUS MONKEYS

    Leonard L. Howell;F. Ivy Carroll;John R. Votaw;Mark M. Goodman

  • Behavioral and physiological effects of xanthines in nonhuman primates.

    L. L. Howell;Vicki L. Coffin;Roger D. Spealman

  • Effects of Serotonin 2C Receptor Agonists on the Behavioral and Neurochemical Effects of Cocaine in Squirrel Monkeys

    Daniel F. Manvich;Heather L. Kimmel;Leonard L. Howell

  • Inhibition of serotonin transporters disrupts the enhancement of fear memory extinction by 3,4-methylenedioxymethamphetamine (MDMA).

    Matthew B. Young;Seth D. Norrholm;Seth D. Norrholm;Lara M. Khoury;Tanja Jovanovic;Tanja Jovanovic

  • Cocaine-induced brain activation determined by positron emission tomography neuroimaging in conscious rhesus monkeys.

    Leonard L. Howell;John M. Hoffman;John R. Votaw;Alyson M. Landrum

  • Cocaine-induced changes in extracellular dopamine determined by microdialysis in awake squirrel monkeys.

    PW Czoty;Jr Jb Justice;LL Howell

  • Faster onset and dopamine transporter selectivity predict stimulant and reinforcing effects of cocaine analogs in squirrel monkeys

    Heather L. Kimmel;Joann A. O'Connor;F. Ivy Carroll;Leonard L. Howell

  • Interactions between the mGluR2/3 agonist, LY379268, and cocaine on in vivo neurochemistry and behavior in squirrel monkeys

    Rayna M. Bauzo;Heather L. Kimmel;Heather L. Kimmel;Leonard L. Howell;Leonard L. Howell

  • Effects of dopamine transporter inhibitors on cocaine self-administration in rhesus monkeys: relationship to transporter occupancy determined by positron emission tomography neuroimaging.

    Kimberly P. Lindsey;Kristin M. Wilcox;John R. Votaw;Mark M. Goodman

  • Ketamine and pharmacological imaging: use of functional magnetic resonance imaging to evaluate mechanisms of action.

    Eric A. Maltbie;Gopinath S. Kaundinya;Leonard L. Howell

  • An apparatus and behavioral training protocol to conduct positron emission tomography (PET) neuroimaging in conscious rhesus monkeys

    L.L. Howell;J.M. Hoffman;J.R. Votaw;A.M. Landrum

  • Comparative behavioral pharmacology of cocaine and the selective dopamine uptake inhibitor RTI-113 in the squirrel monkey.

    Howell Ll;Czoty Pw;Kuhar Mj;Carrol Fi

Frequent Co-Authors

Kenner C. Rice
Kenner C. Rice National Institutes of Health
F. Ivy Carroll
F. Ivy Carroll Research Triangle Park Foundation
Xiaodong Zhang
Xiaodong Zhang The Ohio State University
Yoland Smith
Yoland Smith Emory University
Jocelyne Bachevalier
Jocelyne Bachevalier Emory University
Sergio Tufik
Sergio Tufik Federal University of Sao Paulo
Michael J. Kuhar
Michael J. Kuhar Emory University
Thomas Wichmann
Thomas Wichmann Emory University
John M. Hoffman
John M. Hoffman University of Utah
Scott E. Hemby
Scott E. Hemby High Point University

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