World's Best Scientists 2026 revealed!

D-Index & Metrics

Psychology

D-Index
64
Citations
14522
World Ranking
2988
National Ranking
1713

Timothy R. Vollmer 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 Timothy R. Vollmer 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: 229 publications — 77th percentile

77% of scientists in this discipline score the same or lower.

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

Timothy R. Vollmer 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 Timothy R. Vollmer 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: 64 D-Index — 75th percentile

75% of scientists in this discipline score the same or lower.

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

Overview

Timothy R. Vollmer is affiliated with the University of Florida in the United States. Their research spans psychology, medicine, and neuroscience, with a substantial focus on developmental and educational psychology, cognitive neuroscience, psychiatry and mental health, clinical psychology, and pathology and forensic medicine.

The scientist's primary research topics include behavioral and psychological studies, autism spectrum disorder research, child nutrition and feeding issues, multiple sclerosis research studies, child and adolescent psychosocial and emotional development, attention deficit hyperactivity disorder, and peripheral neuropathies and disorders.

Among recent significant publications are:

  • High-Efficacy Therapies for Treatment-Naïve Individuals with Relapsing-Remitting Multiple Sclerosis, 2022, CNS Drugs
  • Multiple Sclerosis Phenotypes as a Continuum, 2021, Neurology Clinical Practice
  • On the definition of differential reinforcement of alternative behavior, 2020, Journal of Applied Behavior Analysis
  • Applied Behavior Analysis, 2020, The Encyclopedia of Child and Adolescent Development
  • Training behavior analysts to conduct functional analyses using a remote group behavioral skills training package, 2021, Journal of Applied Behavior Analysis

The researcher frequently collaborates with several scholars, notably Stefan Sillau, Kavita Nair, Enríque Alvarez, Kerri P. Peters, and Samuel L. Morris, each of whom has coauthored multiple works with them.

Their work has appeared most often in venues such as:

  • Journal of Applied Behavior Analysis
  • Neurology
  • Behavior Analysis in Practice
  • Behavior Analysis Research and Practice
  • Perspectives on Behavior Science

Best Publications

  • THE FUNCTIONS OF SELF‐INJURIOUS BEHAVIOR: AN EXPERIMENTAL‐EPIDEMIOLOGICAL ANALYSIS

    Brian A. Iwata;Gary M. Pace;Michael F. Dorsey;Jennifer R. Zarcone

  • Evaluation of a brief stimulus preference assessment.

    Henry S. Roane;Timothy R. Vollmer;Joel E. Ringdahl;Bethany A. Marcus

  • The role of attention in the treatment of attention-maintained self-injurious behavior: noncontingent reinforcement and differential reinforcement of other behavior.

    Timothy R. Vollmer;Brian A. Iwata;Jennifer R. Zarcone;Richard G. Smith

  • Stereotypy I: A review of behavioral assessment and treatment

    John T. Rapp;Timothy R. Vollmer

  • The experimental (functional) analysis of behavior disorders: Methodology, applications, and limitations.

    Brian A. Iwata;Timothy R. Vollmer;Jennifer R. Zarcone

  • PROGRESSING FROM BRIEF ASSESSMENTS TO EXTENDED EXPERIMENTAL ANALYSES IN THE EVALUATION OF ABERRANT BEHAVIOR

    Timothy R. Vollmer;Bethany A. Marcus;Joel E. Ringdahl;Henry S. Roane

  • Treatment of Self-Injury and Hand Mouthing Following Inconclusive Functional Analyses.

    Timothy R. Vollmer;Bethany A. Marcus;Linda LeBlanc

  • Effects of treatment integrity failures during differential reinforcement of alternative behavior: a translational model.

    Claire St Peter Pipkin;Timothy R Vollmer;Kimberly N Sloman

  • Questions about behavioral function (QABF): a behavioral checklist for functional assessment of aberrant behavior.

    Theodosia R Paclawskyj;Johnny L Matson;Karena S Rush;Yemonja Smalls

  • The concept of automatic reinforcement: Implications for behavioral research in developmental disabilities

    Timothy R. Vollmer

  • Differential reinforcement as treatment for behavior disorders: procedural and functional variations.

    Timothy R. Vollmer;Brian A. Iwata

  • Establishing operations and reinforcement effects.

    Timothy R. Vollmer;Brian A. Iwata

  • NONCONTINGENT ESCAPE AS TREATMENT FOR SELF-INJURIOUS BEHAVIOR MAINTAINED BY NEGATIVE REINFORCEMENT

    Timothy R. Vollmer;Bethany A. Marcus;Joel E. Ringdahl

  • EVALUATING TREATMENT CHALLENGES WITH DIFFERENTIAL REINFORCEMENT OF ALTERNATIVE BEHAVIOR

    Timothy R. Vollmer;Henry S. Roane;Joel E. Ringdahl;Bethany A. Marcus

  • Competition between positive and negative reinforcement in the treatment of escape behavior

    Joseph S. Lalli;Timothy R. Vollmer;Timothy R. Vollmer;Patrick R. Progar;Carrie Wright

  • AN ANALOGUE EVALUATION OF ENVIRONMENTAL ENRICHMENT: THE ROLE OF STIMULUS PREFERENCE

    Joel E. Ringdahl;Timothy R. Vollmer;Bethany A. Marcus;Henry S. Roane

  • COMBINING NONCONTINGENT REINFORCEMENT AND DIFFERENTIAL REINFORCEMENT SCHEDULES AS TREATMENT FOR ABERRANT BEHAVIOR

    Bethany A. Marcus;Timothy R. Vollmer

  • An investigation of differential reinforcement of alternative behavior without extinction.

    Elizabeth S. Athens;Timothy R. Vollmer

  • Evaluating self-control and impulsivity in children with severe behavior disorders.

    Timothy R. Vollmer;John C. Borrero;Joseph S. Lalli;Dency Daniel

  • Assessment of the convergent validity of the Questions About Behavioral Function scale with analogue functional analysis and the Motivation Assessment Scale.

    T. R. Paclawskyj;J. L. Matson;K. S. Rush;Y. Smalls

Frequent Co-Authors

Brian A. Iwata
Brian A. Iwata University of Florida
Jennifer R. Zarcone
Jennifer R. Zarcone Johns Hopkins University School of Medicine
Henry S. Roane
Henry S. Roane SUNY Upstate Medical University
Dorothea C. Lerman
Dorothea C. Lerman University of Houston - Clear Lake
Johnny L. Matson
Johnny L. Matson Louisiana State University
Jesse Dallery
Jesse Dallery University of Florida
Nancy A. Neef
Nancy A. Neef The Ohio State University
Craig H. Kennedy
Craig H. Kennedy University of Connecticut
Glen Dunlap
Glen Dunlap University of South Florida
Gregory P. Hanley
Gregory P. Hanley Western New England University

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Related Online Degrees & Career Pathways

Pursuing a degree in psychology opens the door to a diverse range of specializations and career opportunities. One fundamental decision is choosing between a PhD in psychology vs PsyD. The PhD path typically focuses on research and academia, while the PsyD is more practice-oriented, preparing graduates for clinical work.

For those interested in supporting young people, exploring jobs in school psychology can lead to meaningful careers working in educational settings to promote student well-being and success.

There are also emerging fields within psychology, such as spiritual psychology career opportunities. Professionals in this area help individuals integrate mental and spiritual health, working in both clinical and holistic environments.

Additionally, students passionate about sports and performance may want to consider the what is the employment outlook for a sports psychologist. This field is steadily growing, with professionals in demand for coaching, rehabilitation, and athletic performance support.

Exploring these pathways will help prospective students find the right fit based on their interests and career goals.

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