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Johannes G. Ramaekers

Johannes G. Ramaekers

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Psychology 75 1812 1633 104 99 320 17141

Johannes G. Ramaekers publications per year

The chart shows the history of publications by Johannes G. Ramaekers between 1992 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Johannes G. Ramaekers published across 34 years, from 1992 to 2025, averaging 11.6 papers a year. Output peaked at 35 publications in 2021. 33 of the 393 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1992 to 2025. Vertical axis: number of publications, 0 to 35. Peak 35 publications in 2021. 1992: 3 publications 1993: 1 publication 1994: 2 publications 1995: 3 publications 1996: 2 publications 1997: 2 publications 1998: 5 publications 1999: 1 publication 2000: 4 publications 2001: 5 publications 2002: 4 publications 2003: 3 publications 2004: 5 publications 2005: 6 publications 2006: 21 publications 2007: 9 publications 2008: 4 publications 2009: 17 publications 2010: 7 publications 2011: 13 publications 2012: 11 publications 2013: 15 publications 2014: 8 publications 2015: 15 publications 2016: 21 publications 2017: 17 publications 2018: 19 publications 2019: 21 publications 2020: 25 publications 2021: 35 publications 2022: 34 publications 2023: 22 publications 2024: 13 publications 2025: 20 publications
1992 2025

393 publications in total across all disciplines

View publications per year as a table
Johannes G. Ramaekers: publications per year, 1992 to 2025
Year Publications
1992 3
1993 1
1994 2
1995 3
1996 2
1997 2
1998 5
1999 1
2000 4
2001 5
2002 4
2003 3
2004 5
2005 6
2006 21
2007 9
2008 4
2009 17
2010 7
2011 13
2012 11
2013 15
2014 8
2015 15
2016 21
2017 17
2018 19
2019 21
2020 25
2021 35
2022 34
2023 22
2024 13
2025 20
Total 393
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Johannes G. Ramaekers 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 Johannes G. Ramaekers 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, 311–320 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: 320 publications — 89th percentile

89% 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
311–320 100 320
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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Johannes G. Ramaekers 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 Johannes G. Ramaekers 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, 74–75 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: 75 D-Index — 85th percentile

85% 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 75
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
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Overview

Johannes G. Ramaekers is affiliated with Maastricht University in the Netherlands. Their research predominantly spans the fields of psychology and neuroscience, with specific focus on clinical psychology, cellular and molecular neuroscience, pharmacology, cognitive neuroscience, and experimental and cognitive psychology.

The primary themes in their work include:

  • Psychedelics and Drug Studies
  • Neurotransmitter Receptor Influence on Behavior
  • Chemical Synthesis and Alkaloids
  • Cannabis and Cannabinoid Research
  • Biochemical Analysis and Sensing Techniques
  • Forensic Toxicology and Drug Analysis
  • Sleep and Work-Related Fatigue

Ramaekers has contributed numerous publications to a range of scientific journals. Frequent publication venues include:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • European Neuropsychopharmacology
  • Psychopharmacology
  • Journal of Psychopharmacology
  • Frontiers in Psychology

Among their recent papers are:

  • "Me, myself, bye: regional alterations in glutamate and the experience of ego dissolution with psilocybin" (2020, Neuropsychopharmacology)
  • "Effect of Cannabidiol and Δ9-Tetrahydrocannabinol on Driving Performance" (2020, JAMA)
  • "Low Doses of LSD Acutely Increase BDNF Blood Plasma Levels in Healthy Volunteers" (2020, ACS Pharmacology & Translational Science)
  • "Spontaneous and deliberate creative cognition during and after psilocybin exposure" (2021, Translational Psychiatry)
  • "Mood and cognition after administration of low LSD doses in healthy volunteers: A placebo controlled dose-effect finding study" (2020, European Neuropsychopharmacology)

The scientist collaborates frequently with a set of co-authors, including:

  • Natasha L. Mason
  • Kim P. C. Kuypers
  • Eef L. Theunissen
  • Johannes T. Reckweg
  • Stefan W. Toennes

Best Publications

  • Dose related risk of motor vehicle crashes after cannabis use

    J G Ramaekers;G Berghaus;M van Laar;Olaf Heino Drummer

  • High-Potency Marijuana Impairs Executive Function and Inhibitory Motor Control

    Johannes G Ramaekers;Gerhold Kauert;Peter van Ruitenbeek;Eef L Theunissen

  • Neurocognitive performance during acute THC intoxication in heavy and occasional cannabis users

    Johannes Gerardus Ramaekers;G. Kauert;E. Theunissen;Stefan W. Toennes

  • Marijuana, alcohol and actual driving performance

    Johannes Gerardus Ramaekers;H. W. J. Robbe;J. F. O'Hanlon

  • An Experimental Study of Catechol-O-Methyltransferase Val158Met Moderation of delta-9-tetrahydrocannabinol-induced Effects on Psychosis and Cognition

    Cecile Henquet;Araceli Rosa;Lydia Krabbendam;Sergi Papiol

  • Cognition and motor control as a function of Delta9-THC concentration in serum and oral fluid: limits of impairment.

    J.G. Ramaekers;M.R. Moeller;P. van Ruitenbeek;E.L. Theunissen

  • Antidepressants and Driver Impairment: Empirical Evidence From a Standard On-the-Road Test.

    Johannes Gerardus Ramaekers

  • Serotonin and human cognitive performance.

    J. A.J. Schmitt;M. Wingen;J. G. Ramaekers;E. A.T. Evers

  • Characterizing the cognitive effects of cocaine: A comprehensive review

    Desirée B. Spronk;Janelle H.P. van Wel;Johannes G. Ramaekers;Robbert J. Verkes;Robbert J. Verkes

  • Developing Limits for Driving Under Cannabis

    Franjo Grotenhermen;Gero Leson;Gunter Berghaus;Olaf Heino Drummer

  • Effects of loratadine and cetirizine on actual driving and psychometric test performance, and EEG during driving.

    Johannes Gerardus Ramaekers;M. M. Uiterwijk;J. F. O'Hanlon

  • Circulating microRNAs as potential biomarkers for psychiatric and neurodegenerative disorders.

    M.M.J. van den Berg;J. Krauskopf;J.G. Ramaekers;J.C.S. Kleinjans

  • Me, myself, bye: regional alterations in glutamate and the experience of ego dissolution with psilocybin

    N. L. Mason;K. P. C. Kuypers;F. Müller;F. Müller;J. Reckweg

  • Antihistamine effects on actual driving performance in a standard test: a summary of Dutch experience, 1989‐94

    J. F. O'Hanlon;Johannes Gerardus Ramaekers

  • Sub-acute and long-term effects of ayahuasca on affect and cognitive thinking style and their association with ego dissolution

    M. V. Uthaug;K. van Oorsouw;K. P. C. Kuypers;M. van Boxtel

  • Ayahuasca enhances creative divergent thinking while decreasing conventional convergent thinking

    Kim Kuypers;J Riba;M de la Fuente Revenga;S Barker

  • A single inhalation of vapor from dried toad secretion containing 5-methoxy-N,N-dimethyltryptamine (5-MeO-DMT) in a naturalistic setting is related to sustained enhancement of satisfaction with life, mindfulness-related capacities, and a decrement of psychopathological symptoms

    M. V. Uthaug;R. Lancelotta;K. van Oorsouw;K. P. C. Kuypers

  • Tolerance and cross-tolerance to neurocognitive effects of THC and alcohol in heavy cannabis users

    Johannes Gerardus Ramaekers;Eef L. Theunissen;Marjolein de Brouwer;Stefan W. Toennes

  • Cannabidiol (CBD) content in vaporized cannabis does not prevent tetrahydrocannabinol (THC)-induced impairment of driving and cognition

    Thomas R. Arkell;Nicholas Lintzeris;Richard C. Kevin;Johannes G. Ramaekers

  • Acute Effects of 3,4-Methylenedioxymethamphetamine (MDMA) on Behavioral Measures of Impulsivity: Alone and in Combination with Alcohol

    Johannes Gerardus Ramaekers;Kim P. C. Kuypers

  • On-the-road driving performance the morning after bedtime administration of lemborexant in healthy adult and elderly volunteers

    Annemiek Vermeeren;Stefan Jongen;Patricia Murphy;Margaret Moline

Frequent Co-Authors

Eef L. Theunissen
Eef L. Theunissen Maastricht University
Kim P. C. Kuypers
Kim P. C. Kuypers Maastricht University
Joris C. Verster
Joris C. Verster Utrecht University
Wim J. Riedel
Wim J. Riedel Maastricht University
Magí Farré
Magí Farré Autonomous University of Barcelona
Arjan Blokland
Arjan Blokland Maastricht University
Karel Brookhuis
Karel Brookhuis University of Groningen
Robbert-Jan Verkes
Robbert-Jan Verkes Radboud University
Rafael de la Torre
Rafael de la Torre Pompeu Fabra University
Amanda Feilding
Amanda Feilding Beckley Foundation

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