World's Best Scientists 2026 revealed!
VIEW LIST
Richard M. Ryckman

Richard M. Ryckman

University of Maine
United States

Last Updated:

D-Index & Metrics

?
Discipline name D-Index World Ranking National Ranking Publications Citations
Psychology 33 10472 5504 92 5333

Richard M. Ryckman publications per year

The chart shows the history of publications by Richard M. Ryckman between 1966 and 2020, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Richard M. Ryckman published across 55 years, from 1966 to 2020, averaging 1.8 papers a year. Output peaked at 5 publications in 1972. 1 of the 101 publications appeared in the last two years.

No. of publications
1 2 3 4 5
Bar chart. Horizontal axis: year, 1966 to 2020. Vertical axis: number of publications, 0 to 5. Peak 5 publications in 1972. 1966: 1 publication 1967: 0 publications 1968: 1 publication 1969: 1 publication 1970: 0 publications 1971: 3 publications 1972: 5 publications 1973: 4 publications 1974: 3 publications 1975: 2 publications 1976: 3 publications 1977: 2 publications 1978: 2 publications 1979: 2 publications 1980: 3 publications 1981: 0 publications 1982: 4 publications 1983: 1 publication 1984: 3 publications 1985: 2 publications 1986: 2 publications 1987: 1 publication 1988: 1 publication 1989: 2 publications 1990: 3 publications 1991: 4 publications 1992: 4 publications 1993: 3 publications 1994: 2 publications 1995: 3 publications 1996: 2 publications 1997: 1 publication 1998: 4 publications 1999: 3 publications 2000: 2 publications 2001: 0 publications 2002: 1 publication 2003: 1 publication 2004: 1 publication 2005: 2 publications 2006: 2 publications 2007: 3 publications 2008: 1 publication 2009: 3 publications 2010: 1 publication 2011: 3 publications 2012: 0 publications 2013: 3 publications 2014: 0 publications 2015: 0 publications 2016: 0 publications 2017: 0 publications 2018: 0 publications 2019: 0 publications 2020: 1 publication
1966 2020

101 publications in total across all disciplines

View publications per year as a table
Richard M. Ryckman: publications per year, 1966 to 2020
Year Publications
1966 1
1967 0
1968 1
1969 1
1970 0
1971 3
1972 5
1973 4
1974 3
1975 2
1976 3
1977 2
1978 2
1979 2
1980 3
1981 0
1982 4
1983 1
1984 3
1985 2
1986 2
1987 1
1988 1
1989 2
1990 3
1991 4
1992 4
1993 3
1994 2
1995 3
1996 2
1997 1
1998 4
1999 3
2000 2
2001 0
2002 1
2003 1
2004 1
2005 2
2006 2
2007 3
2008 1
2009 3
2010 1
2011 3
2012 0
2013 3
2014 0
2015 0
2016 0
2017 0
2018 0
2019 0
2020 1
Total 101
Download as CSV

Richard M. Ryckman publications per year - data summary

  • Richard M. Ryckman, a Psychology scholar from University of Maine, has 101 publications recorded across 55 years, from 1966 to 2020.
  • The oldest publication on record dates to 1966 and the most recent to 2020.
  • The most productive year is 1972, with 5 publications.
  • The least productive years with any output are 1966, 1968, 1969, 1983 and others, with 1 publication each.
  • 11 of the 55 years in the span carry no publications at all (1967, 1970, 1981, 2001 and others).
  • The rate of publication averages 1.8 papers per year over the whole span, or 2.3 per year counting only the 44 years with at least one publication.
  • The last 5 years on the chart (2016-2020) hold 1 publication, <1% of the career total.
  • Split into equal eras - 1966-1984: 40 publications (2.1 per year); 1985-2003: 41 publications (2.2 per year); 2004-2020: 20 publications (1.2 per year).
  • Comparing the opening and closing eras, the overall trend of publication is declining.

Richard M. Ryckman 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 Richard M. Ryckman 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, 91–100 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: 92 publications — 15th percentile

15% 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 92
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
Download as CSV

Richard M. Ryckman publication distribution in Psychology in 2026 - data summary

  • The chart plots the publication count of all 11,416 Psychology scientists ranked by Research.com in 2026, grouped into 69 ranges running from 31–40 to 705+ publications.
  • Richard M. Ryckman, a Psychology scholar from University of Maine, records 92 publications - the 15th percentile of the discipline.
  • 15% of ranked Psychology scientists score the same or lower than Richard M. Ryckman, and about 85% score higher.
  • The median of the discipline falls in the 151–160 publications range, and Richard M. Ryckman ranks below the median.
  • The most crowded range is 101–110 publications, holding 736 scientists (6% of the field).
  • 72% of the field sits in the lowest quarter of the value range (up to 201–210 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 705 publications or more, 100 scientists in all (<1% of the field).

Richard M. Ryckman 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 Richard M. Ryckman 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, 32–33 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: 33 D-Index — 10th percentile

10% 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 33
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
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

Richard M. Ryckman D-index placement in Psychology in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 11,416 Psychology scientists ranked by Research.com in 2026, grouped into 58 ranges running from 30–31 to 144+ D-Index.
  • Richard M. Ryckman, a Psychology scholar from University of Maine, records 33 D-Index - the 10th percentile of the discipline.
  • 10% of ranked Psychology scientists score the same or lower than Richard M. Ryckman, and about 90% score higher.
  • The median of the discipline falls in the 48–49 D-Index range, and Richard M. Ryckman ranks below the median.
  • The most crowded range is 32–33 D-Index, holding 702 scientists (6% of the field).
  • 68% of the field sits in the lowest quarter of the value range (up to 58–59 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 144 D-Index or more, 98 scientists in all (<1% of the field).

Best Publications

  • Social support in diabetes: a systematic review of controlled intervention studies

    Henk A. van Dam;Frans G. van der Horst;Lut Knoops;Richard M. Ryckman

  • Development and validation of a physical self-efficacy scale.

    Richard M. Ryckman;Michael A. Robbins;Billy Thornton;Peggy Cantrell

  • Development and validation of a physical self-efficacy scale.

    Unknown

  • Physical and psychosocial correlates of head and neck cancer: a review of the literature.

    M. F. De Boer;L. K. Mccormick;J. F. A. Pruyn;R. M. Ryckman

  • Construction of a Hypercompetitive Attitude Scale

    Richard M. Ryckman;Max Hammer;Linda M. Kaczor;Joel A. Gold

  • Construction of a Personal Development Competitive Attitude Scale

    Richard M. Ryckman;Max Hammer;Linda M. Kaczor;Joel A. Gold

  • Theories of Personality

    Richard M. Ryckman

  • Personality Correlates of the Hypercompetitive Attitude Scale: Validity Tests of Horney's Theory of Neurosis

    R M Ryckman;B Thornton;J C Butler

  • Rehabilitation outcomes of long‐term survivors treated for head and neck cancer

    M. F. De Boer;J. F. A. Pruyn;B. Van Den Borne;P. P. Knegt

  • Values of hypercompetitive and personal development competitive individuals.

    R M Ryckman;C R Libby;B van den Borne;J A Gold

  • Psychosocial aspects of head and neck cancer–a review of the literature

    J. F. A. Pruyn;P. C. de Jong;L. J. Bosman;J. W. M. J. van Poppel

  • Value priorities in American and British female and male university students

    Richard M. Ryckman;Diane M. Houston

  • Psychosocial and physical correlates of survival and recurrence in patients with head and neck carcinoma: results of a 6-year longitudinal study.

    Maarten F. De Boer;Bart Van den Borne;Jean F. A. Pruyn;Richard M. Ryckman

  • Construction of a Hypercompetitive Attitude Scale

    Unknown

  • Relationship between self-esteem and internal-external control for men and women.

    Richard M. Ryckman;Martin F. Sherman

  • Psychosocial correlates of cancer relapse and survival: a literature review

    M.F De Boer;R.M Ryckman;J.F.A Pruyn;H.W Van den Borne

  • Forms of Competitive Attitude and Achievement Orientation in Relation to Disordered Eating

    Michelle A. Burckle;Richard M. Ryckman;Joel A. Gold;Bill Thornton

  • The Influence of a Rape Victim's Physical Attractiveness on Observers' Attributions of Responsibility

    Bill Thornton;Richard M. Ryckman

  • Male and Female Raters' Stereotyping of Male and Female Physiques

    Richard M. Ryckman;Michael A. Robbins;Linda M. Kaczor;Joel A. Gold

  • Relationship between Locus of Control and Chronological Age

    Richard M. Ryckman;Maria X. Malikiosi

Frequent Co-Authors

Bart van den Borne
Bart van den Borne Maastricht University
Martin F. Sherman
Martin F. Sherman Loyola University Maryland

External Links

Personal website of Richard M. Ryckman

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:

Best Scientists Citing Richard M. Ryckman

Simon N. Rogers

Simon N. Rogers

Edge Hill University

Publications: 12

Cláudia Ferreira

Cláudia Ferreira

University of Coimbra

Publications: 11

Edward McAuley

Edward McAuley

University of Illinois at Urbana-Champaign

Publications: 10

Barry H. Schneider

Barry H. Schneider

Boston College

Publications: 8

Derek Lowe

Derek Lowe

Astraglobe Ltd

Publications: 7

Cristiana Duarte

Cristiana Duarte

York St John University

Publications: 6

Kerry S. Courneya

Kerry S. Courneya

University of Alberta

Publications: 6

Frans Pouwer

Frans Pouwer

University of Southern Denmark

Publications: 6

Gerald M. Devins

Gerald M. Devins

Princess Margaret Cancer Centre

Publications: 5

Neil K. Aaronson

Neil K. Aaronson

Antoni van Leeuwenhoek Hospital

Publications: 5

Remco de Bree

Remco de Bree

Utrecht University

Publications: 5

Michele Heisler

Michele Heisler

University of Michigan–Ann Arbor

Publications: 5

Michel Wensing

Michel Wensing

Heidelberg University

Publications: 5

Kathleen A. Martin Ginis

Kathleen A. Martin Ginis

University of British Columbia

Publications: 4

Rupert Brown

Rupert Brown

University of Sussex

Publications: 4

John Weinman

John Weinman

King's College London

Publications: 4

Related Psychology Rankings & Guides

2027 Mississippi Psychology Licensure Requirements – How to Become a Psychologist in Mississippi

2027 Mississippi Psychology Licensure Requirements – How to Become a Psychologist in Mississippi
2027 Medical Social Work: How to Become a Hospital Social Worker

2027 Medical Social Work: How to Become a Hospital Social Worker
2027 Best Accredited BSW Online Programs

2027 Best Accredited BSW Online Programs
2027 Best Psychology Schools in Hawaii – Accredited Colleges & Programs

2027 Best Psychology Schools in Hawaii – Accredited Colleges & Programs
2027 How to Become a Licensed Counselor (LPC) in Virginia

2027 How to Become a Licensed Counselor (LPC) in Virginia
2027 What Can You Do with a Psychology Degree? 25 Career Options to Choose From

2027 What Can You Do with a Psychology Degree? 25 Career Options to Choose From
2027 Indiana Psychology Licensure Requirements – How to Become a Psychologist in Indiana

2027 Indiana Psychology Licensure Requirements – How to Become a Psychologist in Indiana
2027 Child Psychology Careers: Guide to Career Paths, Options & Salary

2027 Child Psychology Careers: Guide to Career Paths, Options & Salary
2027 Best Psychology Schools in Pennsylvania – Accredited Colleges & Programs

2027 Best Psychology Schools in Pennsylvania – Accredited Colleges & Programs
2027 Alabama Psychology Licensure Requirements – How to Become a Psychologist in Alabama

2027 Alabama Psychology Licensure Requirements – How to Become a Psychologist in Alabama
2027 Highest Paying Psychology Careers: Job Overview, Salary, and Outlook

2027 Highest Paying Psychology Careers: Job Overview, Salary, and Outlook
2026 Most Affordable Online MSW Programs

2026 Most Affordable Online MSW Programs
2027 How to Become a Licensed Counselor (LPC) in Minnesota

2027 How to Become a Licensed Counselor (LPC) in Minnesota
2027 How to Become a Licensed Counselor (LPC) in Utah

2027 How to Become a Licensed Counselor (LPC) in Utah
2027 Introduction to Psychosocial Development Theory in Social Work With Examples

2027 Introduction to Psychosocial Development Theory in Social Work With Examples
2027 Best Developmental Psychology Doctorate Programs

2027 Best Developmental Psychology Doctorate Programs
2027 Best Psychology Schools in New Mexico – Accredited Colleges & Programs

2027 Best Psychology Schools in New Mexico – Accredited Colleges & Programs
2027 How to Become a Licensed Counselor (LPC) in Ohio

2027 How to Become a Licensed Counselor (LPC) in Ohio
2027 Best Psychology Schools in Ohio – Accredited Colleges & Programs

2027 Best Psychology Schools in Ohio – Accredited Colleges & Programs
2027 Arkansas Psychology Licensure Requirements – How to Become a Psychologist in Arkansas

2027 Arkansas Psychology Licensure Requirements – How to Become a Psychologist in Arkansas
2027 Best Online Clinical Psychology Degree Programs

2027 Best Online Clinical Psychology Degree Programs

Recently Published Articles

2027 Best Biological Science Degree Programs

2027 Best Biological Science Degree Programs
2027 How to Become an Auto Mechanic: Salary & Career Paths

2027 How to Become an Auto Mechanic: Salary & Career Paths
2027 How Long Does It Take to Be a Teacher in West Virginia?

2027 How Long Does It Take to Be a Teacher in West Virginia?
2027 Fastest Online Supply Chain Management Bachelor's Degree Programs You Can Finish in 3 Years or Less

2027 Fastest Online Supply Chain Management Bachelor's Degree Programs You Can Finish in 3 Years or Less
2027 Gerontology vs Geriatrics: Explaining the Differences

2027 Gerontology vs Geriatrics: Explaining the Differences
2027 Shortest Online Public Policy Degree Master's Programs That Pay Well: Cost, Time to Completion, and Salary Outlook

2027 Shortest Online Public Policy Degree Master's Programs That Pay Well: Cost, Time to Completion, and Salary Outlook
2027 Criminal Justice Degree Salary by Industry: Where Graduates Earn the Most

2027 Criminal Justice Degree Salary by Industry: Where Graduates Earn the Most
2027 Online Dual-Degree Programs: Everything You Should Know

2027 Online Dual-Degree Programs: Everything You Should Know
2027 LPC Counseling Licensure Requirements in North Carolina

2027 LPC Counseling Licensure Requirements in North Carolina
2027 Education Degree Programs With Rolling Admissions

2027 Education Degree Programs With Rolling Admissions
2027 Online Family Nurse Practitioner Degree Master's Programs That Accept Transfer Credits

2027 Online Family Nurse Practitioner Degree Master's Programs That Accept Transfer Credits
2027 Highest Level of Biomimicry Degree You Can Achieve: Academic Progression Explained

2027 Highest Level of Biomimicry Degree You Can Achieve: Academic Progression Explained
2027 Best PhD Programs With Career Coaching

2027 Best PhD Programs With Career Coaching
2027 Military-Friendly Online Geographic Information Systems Degree Programs: Benefits, Accreditation, and Career Outcomes

2027 Military-Friendly Online Geographic Information Systems Degree Programs: Benefits, Accreditation, and Career Outcomes
2027 AI Bachelor's Degrees for Healthcare Professionals

2027 AI Bachelor's Degrees for Healthcare Professionals
2027 Accelerated Online Public Administration Degree Programs VS Weekly Start Online Degrees: Which Is Faster

2027 Accelerated Online Public Administration Degree Programs VS Weekly Start Online Degrees: Which Is Faster
2027 How to Become a Middle School Math Teacher in Michigan: Requirements & Certification

2027 How to Become a Middle School Math Teacher in Michigan: Requirements & Certification
2027 Most In-Demand Engineering Degrees

2027 Most In-Demand Engineering Degrees
2027 Work Experience Requirements for Health Administration Degree Master's Programs

2027 Work Experience Requirements for Health Administration Degree Master's Programs
2027 How to Become a Kindergarten Teacher in New Mexico

2027 How to Become a Kindergarten Teacher in New Mexico
2027 Online Construction Management Degree Programs Costs: Tuition & Fees

2027 Online Construction Management Degree Programs Costs: Tuition & Fees