World's Best Scientists 2026 revealed!
Leonard A. Jason

Leonard A. Jason

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Psychology 81 1379 1228 828 720 849 26264

Leonard A. Jason publications per year

The chart shows the history of publications by Leonard A. Jason between 1973 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Leonard A. Jason published across 53 years, from 1973 to 2025, averaging 19.4 papers a year. Output peaked at 58 publications in 2015. 27 of the 1,027 publications appeared in the last two years.

No. of publications
10 20 30 40 50
Bar chart. Horizontal axis: year, 1973 to 2025. Vertical axis: number of publications, 0 to 58. Peak 58 publications in 2015. 1973: 1 publication 1974: 1 publication 1975: 3 publications 1976: 3 publications 1977: 7 publications 1978: 8 publications 1979: 12 publications 1980: 11 publications 1981: 10 publications 1982: 11 publications 1983: 10 publications 1984: 13 publications 1985: 11 publications 1986: 7 publications 1987: 10 publications 1988: 17 publications 1989: 10 publications 1990: 13 publications 1991: 8 publications 1992: 9 publications 1993: 11 publications 1994: 11 publications 1995: 11 publications 1996: 7 publications 1997: 16 publications 1998: 23 publications 1999: 18 publications 2000: 18 publications 2001: 22 publications 2002: 26 publications 2003: 15 publications 2004: 16 publications 2005: 22 publications 2006: 32 publications 2007: 32 publications 2008: 24 publications 2009: 34 publications 2010: 18 publications 2011: 28 publications 2012: 32 publications 2013: 35 publications 2014: 26 publications 2015: 58 publications 2016: 48 publications 2017: 40 publications 2018: 23 publications 2019: 25 publications 2020: 29 publications 2021: 57 publications 2022: 25 publications 2023: 43 publications 2024: 14 publications 2025: 13 publications
1973 2025

1,027 publications in total across all disciplines

View publications per year as a table
Leonard A. Jason: publications per year, 1973 to 2025
Year Publications
1973 1
1974 1
1975 3
1976 3
1977 7
1978 8
1979 12
1980 11
1981 10
1982 11
1983 10
1984 13
1985 11
1986 7
1987 10
1988 17
1989 10
1990 13
1991 8
1992 9
1993 11
1994 11
1995 11
1996 7
1997 16
1998 23
1999 18
2000 18
2001 22
2002 26
2003 15
2004 16
2005 22
2006 32
2007 32
2008 24
2009 34
2010 18
2011 28
2012 32
2013 35
2014 26
2015 58
2016 48
2017 40
2018 23
2019 25
2020 29
2021 57
2022 25
2023 43
2024 14
2025 13
Total 1,027
Download as CSV

Leonard A. Jason 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 A. Jason sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 69 bars. Horizontal axis: publications, 31–40 to 705+. Vertical axis: number of scientists, 0 to 736. Most scientists, 736, have 101–110 publications. The last bar groups every scientist with 705 publications or more. The highlighted bar, 705+ publications, is where this scientist sits. 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
31–40 publications 705+

This scientist: 849 publications — 100th percentile

100% of scientists in this discipline score the same or lower.

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

View publications distribution as a table
Number of Psychology scientists by publication count, Research.com 2026 ranking edition. Based on 11,416 ranked scientists.
Publications Scientists This scientist
31–40 6
41–50 52
51–60 138
61–70 299
71–80 461
81–90 605
91–100 713
101–110 736
111–120 686
121–130 670
131–140 644
141–150 597
151–160 576
161–170 477
171–180 450
181–190 397
191–200 343
201–210 328
211–220 313
221–230 283
231–240 226
241–250 196
251–260 201
261–270 171
271–280 151
281–290 139
291–300 113
301–310 102
311–320 100
321–330 76
331–340 92
341–350 85
351–360 69
361–370 71
371–380 63
381–390 58
391–400 57
401–410 43
411–420 33
421–430 50
431–440 41
441–450 32
451–460 27
461–470 28
471–480 25
481–490 28
491–500 20
501–510 23
511–520 26
521–530 17
531–540 21
541–550 14
551–560 16
561–570 10
571–580 22
581–590 9
591–600 14
601–610 9
611–620 11
621–630 4
631–640 7
641–650 5
651–660 10
661–670 8
671–680 8
681–690 4
691–700 3
701–704 4
705+ 100 849
Download as CSV

Leonard A. Jason 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 A. Jason sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 58 bars. Horizontal axis: D-Index, 30–31 to 144+. Vertical axis: number of scientists, 0 to 702. Most scientists, 702, have 32–33 D-Index. The last bar groups every scientist with 144 D-Index or more. The highlighted bar, 80–81 D-Index, is where this scientist sits. 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
30–31 D-Index 144+

This scientist: 81 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.

View D-Index distribution as a table
Number of Psychology scientists by D-index, Research.com 2026 ranking edition. Based on 11,416 ranked scientists.
D-Index Scientists This scientist
30–31 398
32–33 702
34–35 671
36–37 659
38–39 641
40–41 671
42–43 617
44–45 558
46–47 495
48–49 487
50–51 445
52–53 390
54–55 408
56–57 345
58–59 325
60–61 321
62–63 248
64–65 290
66–67 218
68–69 219
70–71 215
72–73 183
74–75 169
76–77 132
78–79 137
80–81 120 81
82–83 112
84–85 86
86–87 101
88–89 83
90–91 77
92–93 70
94–95 78
96–97 58
98–99 53
100–101 57
102–103 48
104–105 53
106–107 46
108–109 24
110–111 35
112–113 27
114–115 32
116–117 31
118–119 22
120–121 16
122–123 24
124–125 18
126–127 11
128–129 19
130–131 10
132–133 16
134–135 10
136–137 12
138–139 8
140–141 5
142–143 12
144+ 98
Download as CSV

Research.com Recognitions

  • 2015 - APA Award for Distinguished Professional Contributions to Applied Research
  • 1983 - Fellow of the American Psychological Association (APA)

Overview

Leonard A. Jason is affiliated with DePaul University in the United States and has made significant contributions to the fields of Medicine and Health Professions. Their research spans a range of subfields including General Health Professions, Psychiatry and Mental Health, Clinical Psychology, Epidemiology, and Neurology.

The primary focus of their work involves topics such as Fibromyalgia and Chronic Fatigue Syndrome Research, Homelessness and Social Issues, Substance Abuse Treatment and Outcomes, Long-Term Effects of COVID-19, Health Disparities and Outcomes, COVID-19 and Mental Health, and broader Health, Psychology, and Well-being.

Recent publications include:

  • ME/CFS and Post-Exertional Malaise among Patients with Long COVID (2022), published in Neurology International
  • COVID-19 Symptoms Over Time: Comparing Long-Haulers to ME/CFS (2021), published in Fatigue Biomedicine Health & Behavior
  • Updating the National Academy of Medicine ME/CFS Prevalence and Economic Impact Figures to Account for Population Growth and Inflation (2021), published in Fatigue Biomedicine Health & Behavior

Other papers relevant to their research interests but authored by collaborators include:

  • Post-Viral Fatigue and COVID-19: Lessons from Past Epidemics (2020), published in Fatigue Biomedicine Health & Behavior
  • Medical Care Situation of People with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome in Germany (2021), published in Medicina

Their frequent co-authors include Ted J. Bobak, Mohammed F. Islam, Mayra Guerrero, Joseph Cotler, and John M. Light.

Leonard A. Jason has published extensively in venues such as:

  • Fatigue Biomedicine Health & Behavior
  • Alcoholism Treatment Quarterly
  • Journal of Community Psychology
  • Journal of Prevention & Intervention in the Community
  • Journal of Social Work Practice in the Addictions

The researcher's work has been recognized through awards including the APA Award for Distinguished Professional Contributions to Applied Research in 2015 and fellowship in the American Psychological Association established in 1983.

Best Publications

  • A community-based study of chronic fatigue syndrome.

    Leonard A. Jason;Judith A. Richman;Alfred W. Rademaker;Karen M. Jordan

  • Identification of ambiguities in the 1994 chronic fatigue syndrome research case definition and recommendations for resolution.

    William C Reeves;Andrew Lloyd;Suzanne D Vernon;Nancy Klimas

  • A social stress model of substance abuse.

    Jean E. Rhodes;Leonard A. Jason

  • Active enforcement of cigarette control laws in the prevention of cigarette sales to minors.

    Leonard A. Jason;Peter Y. Ji;Michael D. Anes;Scott H. Birkhead

  • Pretrauma risk factors for posttraumatic stress disorder: A systematic review of the literature

    Julia A. DiGangi;Daisy Gomez;Leslie Mendoza;Leonard A. Jason

  • Participatory Community Research: Theories and Methods in Action

    Leonard A. Jason;Christopher B. Keys;Yolanda Suarez-Balcazar;Renée R. Taylor

  • The need for substance abuse after-care: Longitudinal analysis of Oxford House

    Leonard A. Jason;Leonard A. Jason;Margaret I. Davis;Margaret I. Davis;Joseph R. Ferrari;Joseph R. Ferrari

  • Social network variables in alcoholics anonymous: A literature review

    D. R. Groh;Leonard A. Jason;C. B. Keys

  • Communal Housing Settings Enhance Substance Abuse Recovery

    Leonard A. Jason;Bradley D. Olson;Joseph R. Ferrari;Anthony T. Lo Sasso

  • Post-viral fatigue and COVID-19: lessons from past epidemics

    Mohammed F. Islam;Joseph Cotler;Leonard A. Jason

  • Earn per view television viewing regulation device

    Leonard A. Jason

  • Preventing substance abuse among children and adolescents

    Jean E. Rhodes;Leonard A. Jason

  • Pilot Study Examining Factors Associated with Academic Success for Hispanic High School Students.

    Olga Reyes;Leonard A. Jason

  • The Development of a Revised Canadian Myalgic Encephalomyelitis Chronic Fatigue Syndrome Case Definition

    Leonard A. Jason;Meredyth Evans;Nicole Porter;Molly Brown

  • Understanding Chronic Fatigue Syndrome: An Empirical Guide to Assessment and Treatment

    Fred Friedberg;Leonard A. Jason

  • The Economic impact of ME/CFS: Individual and societal costs

    Leonard A. Jason;Mary C. Benton;Lisa M. Valentine;Abra Johnson

  • Chronic Fatigue Syndrome: The Need for Subtypes

    Leonard A. Jason;Karina Corradi;Susan Torres-Harding;Renee R. Taylor

  • What is fatigue? Pathological and nonpathological fatigue.

    Leonard A. Jason;Meredyth Evans;Molly Brown;Nicole Porter

  • Pacing as a strategy to improve energy management in myalgic encephalomyelitis/chronic fatigue syndrome: a consensus document

    Ellen M. Goudsmit;Jo Nijs;Leonard A. Jason;Karen E. Wallman

  • Researching community psychology : issues of theory and methods

    Patrick Tolan;Christopher Keys;Fern Chertok;Leonard A. Jason

  • Handbook of Methodological Approaches to Community-Based Research: Qualitative, Quantitative, and Mixed Methods

    Leonard A. Jason;David S. Glenwick

  • Stress and coping: the roles of ethnicity and gender in substance abuse recovery.

    Justin T. Brown;Margaret I. Davis;Leonard A. Jason;Joseph R. Ferrari

Frequent Co-Authors

Joseph R. Ferrari
Joseph R. Ferrari DePaul University
Judith A. Richman
Judith A. Richman University of Illinois at Chicago
Susan D. McMahon
Susan D. McMahon DePaul University
Christopher B. Keys
Christopher B. Keys DePaul University
Alfred W. Rademaker
Alfred W. Rademaker Northwestern University
Adam W. Carrico
Adam W. Carrico University of Miami
Brian R. Flay
Brian R. Flay Boise State University
Stephen B. Fawcett
Stephen B. Fawcett University of Kansas
Mary A Fletcher
Mary A Fletcher Nova Southeastern University
Warren W. Tryon
Warren W. Tryon Fordham University

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Pursuing a degree in psychology opens up diverse career pathways. Many students choose to continue their education online, gaining flexibility while completing requirements for careers such as social work, counseling, or mental health services. Online psychology and social work programs are increasingly popular, making advanced qualifications more accessible.

Becoming a social worker often requires a blend of educational credentials, licensure, and field experience. For example, those interested in becoming a social worker in Vermont must complete specific academic programs and pass state exams. Similarly, the requirements to be a social worker in Virginia include accredited degrees and supervised clinical hours.

Understanding local educational standards is essential. For instance, Washington social work education requirements emphasize both foundational coursework and hands-on practicums. In comparison, the requirements to be a social worker in West Virginia outline several licensure tracks for new graduates.

As you consider your options, research online programs carefully. Select accredited degrees that fit your career goals and comply with state licensure requirements. Exploring related online degrees can provide a flexible and rewarding path to a career in helping others.

Best Scientists Citing Leonard A. Jason

Trending Scientists

Recently Published Articles