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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Psychology 101 603 527 31 30 290 34590
Neuroscience 101 736 661 21 20 292 34752

Jaap M. Koolhaas publications per year

The chart shows the history of publications by Jaap M. Koolhaas between 1974 and 2024, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Jaap M. Koolhaas published across 51 years, from 1974 to 2024, averaging 6.1 papers a year. Output peaked at 20 publications in 1996. 1 of the 309 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1974 to 2024. Vertical axis: number of publications, 0 to 20. Peak 20 publications in 1996. 1974: 1 publication 1975: 0 publications 1976: 1 publication 1977: 0 publications 1978: 1 publication 1979: 3 publications 1980: 2 publications 1981: 0 publications 1982: 0 publications 1983: 1 publication 1984: 3 publications 1985: 1 publication 1986: 2 publications 1987: 6 publications 1988: 4 publications 1989: 3 publications 1990: 10 publications 1991: 12 publications 1992: 12 publications 1993: 15 publications 1994: 8 publications 1995: 6 publications 1996: 20 publications 1997: 16 publications 1998: 13 publications 1999: 18 publications 2000: 13 publications 2001: 19 publications 2002: 3 publications 2003: 9 publications 2004: 7 publications 2005: 16 publications 2006: 1 publication 2007: 7 publications 2008: 7 publications 2009: 9 publications 2010: 10 publications 2011: 13 publications 2012: 4 publications 2013: 10 publications 2014: 6 publications 2015: 6 publications 2016: 2 publications 2017: 5 publications 2018: 0 publications 2019: 1 publication 2020: 1 publication 2021: 0 publications 2022: 1 publication 2023: 0 publications 2024: 1 publication
1974 2024

309 publications in total across all disciplines

View publications per year as a table
Jaap M. Koolhaas: publications per year, 1974 to 2024
Year Publications
1974 1
1975 0
1976 1
1977 0
1978 1
1979 3
1980 2
1981 0
1982 0
1983 1
1984 3
1985 1
1986 2
1987 6
1988 4
1989 3
1990 10
1991 12
1992 12
1993 15
1994 8
1995 6
1996 20
1997 16
1998 13
1999 18
2000 13
2001 19
2002 3
2003 9
2004 7
2005 16
2006 1
2007 7
2008 7
2009 9
2010 10
2011 13
2012 4
2013 10
2014 6
2015 6
2016 2
2017 5
2018 0
2019 1
2020 1
2021 0
2022 1
2023 0
2024 1
Total 309
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Jaap M. Koolhaas publications per year - data summary

  • Jaap M. Koolhaas, a Psychology scholar from University of Groningen, has 309 publications recorded across 51 years, from 1974 to 2024.
  • The oldest publication on record dates to 1974 and the most recent to 2024.
  • The most productive year is 1996, with 20 publications.
  • The least productive years with any output are 1974, 1976, 1978, 1983 and others, with 1 publication each.
  • 7 of the 51 years in the span carry no publications at all (1975, 1977, 1981, 1982 and others).
  • The rate of publication averages 6.1 papers per year over the whole span, or 7.0 per year counting only the 44 years with at least one publication.
  • The last 5 years on the chart (2020-2024) hold 3 publications, <1% of the career total.
  • Split into equal eras - 1974-1990: 38 publications (2.2 per year); 1991-2007: 195 publications (11.5 per year); 2008-2024: 76 publications (4.5 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Jaap M. Koolhaas 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 Jaap M. Koolhaas 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, 281–290 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: 290 publications — 86th percentile

86% 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
281–290 139 290
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
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Jaap M. Koolhaas 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.
  • Jaap M. Koolhaas, a Psychology scholar from University of Groningen, records 290 publications - the 86th percentile of the discipline.
  • 86% of ranked Psychology scientists score the same or lower than Jaap M. Koolhaas, and about 14% score higher.
  • The median of the discipline falls in the 151–160 publications range, and Jaap M. Koolhaas ranks above 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).

Jaap M. Koolhaas 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 Jaap M. Koolhaas 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, 100–101 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: 101 D-Index — 95th percentile

95% 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
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 57 101
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
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Jaap M. Koolhaas 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.
  • Jaap M. Koolhaas, a Psychology scholar from University of Groningen, records 101 D-Index - the 95th percentile of the discipline.
  • 95% of ranked Psychology scientists score the same or lower than Jaap M. Koolhaas, and about 5% score higher.
  • The median of the discipline falls in the 48–49 D-Index range, and Jaap M. Koolhaas ranks above 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).

Overview

Jaap M. Koolhaas is affiliated with the University of Groningen in the Netherlands. Their academic profile includes involvement in various research activities within the institution.

While specific recent papers authored by Jaap M. Koolhaas are not available, their association with the University of Groningen suggests active engagement in scientific research and scholarly pursuits. No co-authors have been listed, which may indicate independent work or a lack of publicly available collaboration data.

No frequent publication venues are recorded for Koolhaas, so there is no direct information about the typical journals or conferences where they disseminate research findings. Similarly, there is no data concerning book publications or main fields of study, subfields, or research topics, which limits detailed insight into their academic specialization.

No awards or honors have been documented in the available data, and the scientist is currently living.

Best Publications

  • Coping styles in animals: current status in behavior and stress-physiology.

    J.M Koolhaas;S.M Korte;S.F De Boer;B.J Van Der Vegt

  • Stress revisited: a critical evaluation of the stress concept

    J.M. Koolhaas;A. Bartolomucci;B. Buwalda;S.F. de Boer

  • The Darwinian concept of stress: benefits of allostasis and costs of allostatic load and the trade-offs in health and disease

    S. Mechiel Korte;Jaap M. Koolhaas;John C. Wingfield;Bruce S. McEwen

  • Neuroendocrinology of coping styles: towards understanding the biology of individual variation.

    J M Koolhaas;de Sietse Boer;C M Coppens;Bauke Buwalda

  • Heritable variation for aggression as a reflection of individual coping strategies.

    R.F. Benus;B. Bohus;J.M. Koolhaas;G.A. van Oortmerssen

  • Coping styles and behavioural flexibility: towards underlying mechanisms

    Caroline M. Coppens;Sietse F. de Boer;Jaap M. Koolhaas

  • Individual variation in coping with stress : A multidimensional approach of ultimate and proximate mechanisms

    Jaap M. Koolhaas;Sietse F. de Boer;Bauke Buwalda;Kees van Reenen

  • Poor sleep as a potential causal factor in aggression and violence.

    Jeanine Kamphuis;Peter Meerlo;Jaap M. Koolhaas;Marike Lancel;Marike Lancel

  • Defensive burying in rodents: ethology, neurobiology and psychopharmacology

    Sietse F. De Boer;Jaap M. Koolhaas

  • Social stress in rats and mice.

    J.M. Koolhaas;de Sietse Boer;A.J.H. de Ruiter;Peter Meerlo

  • The resident-intruder paradigm: a standardized test for aggression, violence and social stress.

    Jaap M. Koolhaas;Caroline M. Coppens;Sietse F. de Boer;Bauke Buwalda

  • 5-HT1A and 5-HT1B receptor agonists and aggression: a pharmacological challenge of the serotonin deficiency hypothesis.

    Sietse F. de Boer;Jaap M. Koolhaas

  • Play is indispensable for an adequate development of coping with social challenges in the rat.

    C. L. van den Berg;T. Hol;J. M. Van Ree;B. M. Spruijt

  • The temporal dynamics of the stress response

    J.M. Koolhaas;P Meerlo;S.F. de Boer;J.H. Strubbe

  • Coping style and immunity in animals: Making sense of individual variation

    J. M. Koolhaas

  • A new animal welfare concept based on allostasis

    S. Mechiel Korte;Berend Olivier;Jaap M. Koolhaas

  • Long-term effects of social stress on brain and behavior: a focus on hippocampal functioning

    Bauke Buwalda;Maarten H.P. Kole;Alexa H. Veenema;Mark Huininga

  • Fecal corticosteroids in a territorial bird selected for different personalities : Daily rhythm and the response to social stress

    C Carere;T.G.G Groothuis;E Möstl;S Daan

  • Personalities in great tits, Parus major : stability and consistency

    Claudio Carere;Piet J. Drent;Lucia Privitera;Jaap M. Koolhaas

  • Housing familiar male wildtype rats together reduces the long-term adverse behavioural and physiological effects of social defeat

    M.A.W Ruis;J.H.A te Brake;B Buwalda;S.F De Boer

Frequent Co-Authors

Béla Bohus
Béla Bohus University of Groningen
Sietse F. de Boer
Sietse F. de Boer University of Groningen
Bauke Buwalda
Bauke Buwalda University of Groningen
Peter Meerlo
Peter Meerlo University of Groningen
Benno Roozendaal
Benno Roozendaal Radboud University
Harry J. Blokhuis
Harry J. Blokhuis Swedish University of Agricultural Sciences
S. Mechiel Korte
S. Mechiel Korte Utrecht University
Vera Baumans
Vera Baumans Utrecht University
Ton G. G. Groothuis
Ton G. G. Groothuis University of Groningen
Eberhard Fuchs
Eberhard Fuchs German Primate Center

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