World's Best Scientists 2026 revealed!

D-Index & Metrics

Psychology

D-Index
48
Citations
10603
World Ranking
5893
National Ranking
3198

Perry M. Nicassio 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 Perry M. Nicassio 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: 106 publications — 24th percentile

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

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

Perry M. Nicassio 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 Perry M. Nicassio 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: 48 D-Index — 49th percentile

49% 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

  • 1993 - Fellow of the American Psychological Association (APA)

Overview

Perry M. Nicassio is affiliated with the University of California, Los Angeles in the United States. Their research primarily spans the fields of Medicine and Psychology, with specific focus on Experimental and Cognitive Psychology, Rheumatology, Cognitive Neuroscience, Education, and Physiology.

Their work covers several main topics, including:

  • Sleep and related disorders
  • Sleep and Wakefulness Research
  • Youth Substance Use and School Attendance
  • Spondyloarthritis Studies and Treatments
  • Pain Mechanisms and Treatments
  • Fibromyalgia and Chronic Fatigue Syndrome Research
  • Rheumatoid Arthritis Research and Therapies

Recent papers by Nicassio demonstrate involvement in both clinical and psychometric research. These include:

  • Development and Validity of the Japanese Version of the Pre-Sleep Arousal Scale, 2020, published in The Tohoku Journal of Experimental Medicine
  • Nonpharmacologic Pain Management in Inflammatory Arthritis, 2021, Rheumatic Disease Clinics of North America
  • The psychometric properties of the Turkish version of the Pre-sleep Arousal Scale, 2023, Sleep and Biological Rhythms
  • Socioeconomic status, reserve capacity, and depressive symptoms predict pain in Rheumatoid Arthritis: an examination of the reserve capacity model, 2024, BMC Rheumatology
  • A reliability generalization meta-analysis of the internal consistency and test-retest reliability of the pre-sleep arousal scale (PSAS), 2024, Sleep Medicine

Nicassio has published in various specialized venues including:

  • The Tohoku Journal of Experimental Medicine
  • Rheumatic Disease Clinics of North America
  • Sleep and Biological Rhythms
  • BMC Rheumatology
  • Sleep Medicine

Frequent collaborators in Nicassio's work include Kutlu Kağan Türkarslan, Deniz Canel Çınarbaş, Isa Okajima, Miho Ishii, and Moeko Ochi.

In 1993, Nicassio was recognized as a Fellow of the American Psychological Association (APA).

Best Publications

  • Development of a questionnaire for the assessment of active and passive coping strategies in chronic pain patients.

    Gregory K. Brown;Perry M. Nicassio

  • The phenomenology of the pre-sleep state: The development of the pre-sleep arousal scale

    Perry M. Nicassio;Debra R. Mendlowitz;Juanita J. Fussell;Lynn Petras

  • Comparative meta-analysis of behavioral interventions for insomnia and their efficacy in middle-aged adults and in older adults 55+ years of age.

    Michael R. Irwin;Jason C. Cole;Perry M. Nicassio

  • The measurement of helplessness in rheumatoid arthritis. The development of the arthritis helplessness index.

    P M Nicassio;K A Wallston;L F Callahan;M Herbert

  • Pain coping strategies and depression in rheumatoid arthritis.

    Gregory K. Brown;Perry M. Nicassio;Kenneth A. Wallston

  • Transition from acute to chronic pain and disability: a model including cognitive, affective, and trauma factors.

    Corinna Young Casey;Melanie A. Greenberg;Perry M. Nicassio;R. Edward Harpin

  • The contribution of pain, reported sleep quality, and depressive symptoms to fatigue in fibromyalgia.

    Perry M Nicassio;Perry M Nicassio;Ellen G Moxham;Catherine E Schuman;Richard N Gevirtz

  • Chronic life stress alters sympathetic, neuroendocrine, and immune responsivity to an acute psychological stressor in humans

    Jennifer L. Pike;Tom L. Smith;Richard L. Hauger;Perry M. Nicassio

  • Sleep loss exacerbates fatigue, depression, and pain in rheumatoid arthritis.

    Michael R. Irwin;Richard Olmstead;Carmen Carrillo;Nina Sadeghi

  • Cognitive behavioral therapy vs. Tai Chi for late life insomnia and inflammatory risk: a randomized controlled comparative efficacy trial.

    Michael R. Irwin;Richard Olmstead;Carmen Carrillo;Nina Sadeghi

  • Longitudinal Relationships Among Pain, Sleep Problems, and Depression in Rheumatoid Arthritis

    Perry M. Nicassio;Kenneth A. Wallston

  • A comparison of progressive relaxation and autogenic training as treatments for insomnia.

    Perry Nicassio;Richard Bootzin

  • Behavioral Treatments for Insomnia

    Richard R. Bootzin;Perry M. Nicassio

  • Cognitive Behavioral Therapy and Tai Chi Reverse Cellular and Genomic Markers of Inflammation in Late Life Insomnia: A Randomized Controlled Trial

    Michael R. Irwin;Michael R. Irwin;Richard Olmstead;Elizabeth C. Breen;Elizabeth C. Breen;Tuff Witarama

  • A comparison of behavioral and educational interventions for fibromyalgia

    P M Nicassio;V Radojevic;M H Weisman;C Schuman

  • Behavioral intervention with and without family support for rheumatoid arthritis

    Vesna Radojevic;Perry M. Nicassio;Perry M. Nicassio;Michael H. Weisman

  • Tai Chi Chih Compared With Cognitive Behavioral Therapy for the Treatment of Insomnia in Survivors of Breast Cancer: A Randomized, Partially Blinded, Noninferiority Trial.

    Michael R. Irwin;Richard Olmstead;Carmen Carrillo;Nina Sadeghi

  • Disease-Specific Patient Reported Outcome Tools for Systemic Lupus Erythematosus

    Meenakshi Jolly;A. Simon Pickard;Joel A. Block;Rajan B. Kumar

  • Tai Chi, Cellular Inflammation, and Transcriptome Dynamics in Breast Cancer Survivors With Insomnia: A Randomized Controlled Trial

    Michael R. Irwin;Richard Olmstead;Elizabeth C. Breen;Tuff Witarama

  • Factor structure of the Arthritis Helplessness Index

    M J Stein;K A Wallston;P M Nicassio

  • Social Support Measurement and Intervention: A Guide for Health and Social Scientists

    Perry M. Nicassio

Frequent Co-Authors

Michael H. Weisman
Michael H. Weisman Cedars-Sinai Medical Center
Michael R. Irwin
Michael R. Irwin University of California, Los Angeles
Richard G. Olmstead
Richard G. Olmstead University of Washington
Kenneth A. Wallston
Kenneth A. Wallston Vanderbilt University Medical Center
Daniel J. Wallace
Daniel J. Wallace Cedars-Sinai Medical Center
Elizabeth C. Breen
Elizabeth C. Breen University of California, Los Angeles
John D. Reveille
John D. Reveille The University of Texas Health Science Center at Houston
Steve W. Cole
Steve W. Cole University of California, Los Angeles
Richard R. Bootzin
Richard R. Bootzin University of Arizona
Gregory K. Brown
Gregory K. Brown University of Wyoming

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