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D-Index & Metrics

Psychology

D-Index
80
Citations
23884
World Ranking
1448
National Ranking
872

D. Dwayne Simpson 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 D. Dwayne Simpson 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: 272 publications — 84th percentile

84% of scientists in this discipline score the same or lower.

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

D. Dwayne Simpson 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 D. Dwayne Simpson 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: 80 D-Index — 88th percentile

88% 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

  • 1996 - Fellow of the American Psychological Association (APA)

Overview

D. Dwayne Simpson is affiliated with Texas Christian University in the United States. Their academic work includes contributions to criminal justice research and correctional treatment assessments.

The recent scholarly output includes a paper titled Process Assessment of Correctional Treatment (PACT), Final Project Report, published in 2025 in the venue CrimRxiv.

  • Process Assessment of Correctional Treatment (PACT), Final Project Report (2025), CrimRxiv

Frequent collaborators in their research include:

  • Matthew L. Hiller
  • Kevin Knight
  • Sandhya R. Rao

Their publication venue record shows activity primarily in:

  • CrimRxiv

In recognition of their professional contributions, D. Dwayne Simpson was awarded the title of Fellow of the American Psychological Association (APA) in 1996.

Best Publications

  • Assessing organizational readiness for change

    Wayne E.K Lehman;Jack M Greener;D.Dwayne Simpson

  • A conceptual framework for transferring research to practice.

    D.Dwayne Simpson

  • Treatment retention and follow-up outcomes in the Drug Abuse Treatment Outcome Study (DATOS).

    D. Dwayne Simpson;George W. Joe;Barry S. Brown

  • Effectiveness of treatment for drug abuse: An overview of the DARP research program.

    D. Dwayne Simpson;S. B. Sells

  • Motivation as a predictor of early dropout from drug abuse treatment.

    D. Dwayne Simpson;George W. Joe

  • Treatment for Drug Abuse: Follow-up Outcomes and Length of Time Spent

    D. Dwayne Simpson

  • A National Evaluation of Treatment Outcomes for Cocaine Dependence

    D. Dwayne Simpson;George W. Joe;Bennett W. Fletcher;Robert L. Hubbard

  • Effects of readiness for drug abuse treatment on client retention and assessment of process

    G W Joe;D D Simpson;K M Broome

  • Effective medical treatment of opiate addiction

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

  • Employee substance use and on-the-job behaviors

    Wayne E. Lehman;D. Dwayne Simpson

  • Retention and patient engagement models for different treatment modalities in DATOS.

    George W Joe;D.Dwayne Simpson;Kirk M Broome

  • Drug abuse treatment process components that improve retention

    D.Dwayne Simpson;George W. Joe;Grace A. Rowan-Szal;Jack M. Greener

  • A conceptual framework for drug treatment process and outcomes.

    D. Dwayne Simpson

  • Drug abuse treatment retention and process effects on follow-up outcomes.

    D Dwayne Simpson;George W Joe;Grace A Rowan-Szal

  • The relation of time spent in drug abuse treatment to posttreatment outcome.

    D. Dwayne Simpson

  • Program diversity and treatment retention rates in the Drug Abuse Treatment Outcome Study (DATOS).

    D. Dwayne Simpson;George W. Joe;Kirk M. Broome;Matthew L. Hiller

  • Contingency management in outpatient methadone treatment: a meta-analysis

    James D. Griffith;Grace A. Rowan-Szal;Ryan R. Roark;D.Dwayne Simpson

  • Prison‐based substance abuse treatment, residential aftercare and recidivism

    Matthew L. Hiller;Kevin Knight;D. Dwayne Simpson

  • A national 5-year follow-up of treatment outcomes for cocaine dependence.

    D. Dwayne Simpson;George W. Joe;Kirk M. Broome

  • Client engagement and change during drug abuse treatment

    D.Dwayne Simpson;George W. Joe;Grace Rowan-Szal;Jack Greener

Frequent Co-Authors

George W. Joe
George W. Joe Texas Christian University
Kevin Knight
Kevin Knight Texas Christian University
Patrick M. Flynn
Patrick M. Flynn Texas Christian University
Barry S. Brown
Barry S. Brown University of North Carolina Wilmington
Robert L. Hubbard
Robert L. Hubbard RTI International
Kerry L. Marsh
Kerry L. Marsh University of Connecticut
Mark L. Williams
Mark L. Williams Florida International University
David Best
David Best University of Derby
Roselind Lieb
Roselind Lieb University of Basel

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