World's Best Scientists 2026 revealed!

D-Index & Metrics

Psychology

D-Index
79
Citations
36363
World Ranking
1484
National Ranking
886

A. Thomas McLellan 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 A. Thomas McLellan 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: 344 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: 34 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 701–705 publications: 5 scientists 706+ publications: 100 scientists
31 publications 706+

This scientist: 246 publications — 80th percentile

80% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 706 publications or more.

A. Thomas McLellan 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 A. Thomas McLellan 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: 559 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: 87 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: 79 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: 79 D-Index — 87th percentile

87% of scientists in this discipline score the same or lower.

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

Overview

A. Thomas McLellan is affiliated with the University of Pennsylvania in the United States. Their research primarily focuses on various aspects of medicine and psychology, with specific attention to applied psychology, pharmacology, experimental and cognitive psychology, psychiatry, mental health, and epidemiology.

The scientist's work spans several topics related to mental health and treatment interventions. These include digital mental health interventions, treatment of major depression, wider mental health research topics, schizophrenia research and treatment, substance abuse treatment and outcomes, opioid use disorder treatment, and patient involvement in mental health care.

Recent publications by A. Thomas McLellan cover a range of subjects within addiction treatment and mental health, documented in various academic journals. These include:

  • "Patient and public involvement in health services: Paying more than lip service" (2024) published in Developmental Medicine & Child Neurology
  • "Can Smartphone-Based Support Apps Add Value to the Treatment of Opioid Use Disorder?" (2024) published in American Journal of Psychiatry

Other recent works, while not authored by McLellan but related to the field, further contextualize the environment in which they contribute, such as:

  • "The Concept of Treatment-Refractory Addiction: Implications for Addiction Treatment Systems and Research" (2024) in Journal of Addiction Medicine
  • "Demonstration of an app-delivered digital therapeutic program for methamphetamine use disorder" (2023) in Frontiers in Psychiatry

Frequent co-authors collaborating with A. Thomas McLellan include Edward V. Nunes, Kristin Muhlner, Jeff DeFlavio, Alfonso Ang, and Michael Zito.

Their research has been published in several key academic venues, which reflect the interdisciplinary range of their work:

  • Journal of Addiction Medicine
  • Frontiers in Psychiatry
  • Developmental Medicine & Child Neurology
  • American Journal of Psychiatry

A. Thomas McLellan's contributions align closely with advancing knowledge in mental health, addiction treatment, and digital therapeutic interventions. Their work addresses critical issues at the intersection of clinical practice and innovative healthcare technologies.

Best Publications

  • An improved diagnostic evaluation instrument for substance abuse patients. The Addiction Severity Index.

    A T McLellan;L Luborsky;G E Woody;C P O'Brien

  • The fifth edition of the addiction severity index

    A.Thomas McLellan;Harvey Kushner;David Metzger;Roger Peters

  • Drug Dependence, a Chronic Medical Illness: Implications for Treatment, Insurance, and Outcomes Evaluation

    A. Thomas McLellan;David C. Lewis;Herbert D. Kleber

  • Opioid Abuse in Chronic Pain — Misconceptions and Mitigation Strategies

    Nora D. Volkow;A. Thomas McLellan

  • Therapist Success and Its Determinants

    Lester Luborsky;A. Thomas McLellan;George E. Woody;Charles P. O'Brien

  • Myths about the treatment of addiction

    CharlesP. O'Brien;A. Thomas McLellan

  • Classical conditioning in drug-dependent humans.

    Charles P. O'brien;Anna Rose Childress;A. Thomas McLELLAN;Ronald Ehrman

  • The Addiction Severity Index at 25: origins, contributions and transitions.

    A. Thomas McLellan;John C. Cacciola;Arthur I. Alterman;Samuel H. Rikoon

  • Reconsidering the evaluation of addiction treatment: From retrospective follow-up to concurrent recovery monitoring.

    A. Thomas McLellan;James R. McKay;Robert Forman;John Cacciola

  • Similarity of outcome predictors across opiate, cocaine, and alcohol treatments: Role of treatment services.

    A. Thomas McLellan;Arthur I. Alterman;David S. Metzger;Grant R. Grissom

  • Psychotherapy for Opiate Addicts: Does It Help?

    Woody Ge;Luborsky L;McLellan At;O'Brien Cp

  • Effective medical treatment of opiate addiction

    L. L. Judd;M. G. Marston;C. Attkisson;W. Berrettini

  • Sociopathy and Psychotherapy Outcome

    George E. Woody;A. Thomas McLellan;Lester Luborsky;Charles P. O'Brien

  • Can the national addiction treatment infrastructure support the public's demand for quality care?

    A Thomas McLellan;Deni Carise;Herbert D Kleber

  • Have we evaluated addiction treatment correctly? Implications from a chronic care perspective.

    A. Thomas McLellan

  • Five year outcomes in a cohort study of physicians treated for substance use disorders in the United States

    A Thomas McLellan;Gregory S Skipper;Michael Campbell;Robert L DuPont

  • DO THERAPISTS VARY MUCH IN THEIR SUCCESS?. Findings from Four Outcome Studies

    Lester Luborsky;Paul Crits-Christoph;A. Thomas McLellan;George Woody

  • Self-help organizations for alcohol and drug problems: Toward evidence-based practice and policy

    Keith Humphreys;Stephen Wing;Dennis McCarty;John Chappel

  • Initial evidence for the reliability and validity of a “Lite” version of the Addiction Severity Index

    John S. Cacciola;John S. Cacciola;Arthur I. Alterman;A. Thomas McLellan;Yi-Ting Lin

  • Abstinent Opiate Abusers Exhibit Conditioned Craving, Conditioned Withdrawal and Reductions in both through Extinction

    Anna Rose Childress;A. Thomas McLELLAN;Charles P. O'brien

Frequent Co-Authors

Arthur I. Alterman
Arthur I. Alterman University of Pennsylvania
John S. Cacciola
John S. Cacciola University of Pennsylvania
James R. McKay
James R. McKay University of Pennsylvania
Lester Luborsky
Lester Luborsky University of Pennsylvania
Anna Rose Childress
Anna Rose Childress University of Pennsylvania
Kevin G. Lynch
Kevin G. Lynch University of Pennsylvania
Megan J. Rutherford
Megan J. Rutherford University of Washington
Kimberly C. Kirby
Kimberly C. Kirby Rowan University
Lisa J. Merlo
Lisa J. Merlo University of Florida
Deborah J. Wiebe
Deborah J. Wiebe University of Pennsylvania

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