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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Psychology 44 7040 6566 313 301 153 6446

Sjoerd Sytema publications per year

The chart shows the history of publications by Sjoerd Sytema between 1989 and 2021, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Sjoerd Sytema published across 33 years, from 1989 to 2021, averaging 4.7 papers a year. Output peaked at 17 publications in 2012. 3 of the 155 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1989 to 2021. Vertical axis: number of publications, 0 to 17. Peak 17 publications in 2012. 1989: 4 publications 1990: 0 publications 1991: 1 publication 1992: 1 publication 1993: 1 publication 1994: 0 publications 1995: 0 publications 1996: 2 publications 1997: 3 publications 1998: 5 publications 1999: 3 publications 2000: 4 publications 2001: 0 publications 2002: 4 publications 2003: 2 publications 2004: 3 publications 2005: 4 publications 2006: 9 publications 2007: 8 publications 2008: 16 publications 2009: 8 publications 2010: 10 publications 2011: 11 publications 2012: 17 publications 2013: 8 publications 2014: 9 publications 2015: 5 publications 2016: 4 publications 2017: 4 publications 2018: 4 publications 2019: 2 publications 2020: 2 publications 2021: 1 publication
1989 2021

155 publications in total across all disciplines

View publications per year as a table
Sjoerd Sytema: publications per year, 1989 to 2021
Year Publications
1989 4
1990 0
1991 1
1992 1
1993 1
1994 0
1995 0
1996 2
1997 3
1998 5
1999 3
2000 4
2001 0
2002 4
2003 2
2004 3
2005 4
2006 9
2007 8
2008 16
2009 8
2010 10
2011 11
2012 17
2013 8
2014 9
2015 5
2016 4
2017 4
2018 4
2019 2
2020 2
2021 1
Total 155
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Sjoerd Sytema 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 Sjoerd Sytema 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, 151–160 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: 153 publications — 51st percentile

51% 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
151–160 576 153
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
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Sjoerd Sytema 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 Sjoerd Sytema 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, 44–45 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: 44 D-Index — 41st percentile

41% 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 44
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
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Overview

Sjoerd Sytema is affiliated with the University Medical Center Groningen in the Netherlands and has contributed to the fields of Medicine, Arts and Humanities, and Psychology. Their work spans important subfields such as Psychiatry and Mental Health, Philosophy, and Clinical Psychology.

Sytema's research focuses notably on schizophrenia and broader mental health topics, with particular attention to schizophrenia research and treatment, mental health and psychiatry, and obsessive-compulsive spectrum disorders. This reflects an interdisciplinary approach combining clinical psychology and psychiatric research.

Among Sytema's recent publications is the paper titled "Reprint of: Negative symptoms predict high relapse rates and both predict less favorable functional outcome in first episode psychosis, independent of treatment strategy", published in 2020 in the journal Schizophrenia Research.

Frequent co-authors collaborating with Sytema include:

  • Lex Wunderink
  • Jan van Bebber
  • Nynke Boonstra
  • Rob R. Meijer
  • Johanna T. W. Wigman

Sytema's published work has appeared in:

  • Schizophrenia Research

Their research contributions intersect clinical and philosophical perspectives within mental health, supporting a broader understanding of psychiatric disorders and their outcomes.

Best Publications

  • Recovery in Remitted First-Episode Psychosis at 7 Years of Follow-up of an Early Dose Reduction/Discontinuation or Maintenance Treatment Strategy: Long-term Follow-up of a 2-Year Randomized Clinical Trial

    Lex Wunderink;Roeline M. Nieboer;Durk Wiersma;Sjoerd Sytema

  • Interrelationship between Autism Diagnostic Observation Schedule-Generic (ADOS-G), Autism Diagnostic Interview-Revised (ADI-R), and the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR) Classification in Children and Adolescents with Mental Retardation.

    Annelies de Bildt;Sjoerd Sytema;Cees Ketelaars;Dirk Kraijer

  • Duration of untreated psychosis and negative symptoms--a systematic review and meta-analysis of individual patient data.

    Nynke Boonstra;Rianne Klaassen;Sjoerd Sytema;Max Marshall

  • Guided Discontinuation Versus Maintenance Treatment in Remitted First-Episode Psychosis: Relapse Rates and Functional Outcome

    Lex Wunderink;Fokko J. Nienhuis;Sjoerd Sytema;Cees J. Slooff

  • Effectiveness of behavioral parent training for children with ADHD in routine clinical practice: a randomized controlled study.

    Barbara J. van den Hoofdakker;Lianne van der Veen-Mulders;Sjoerd Sytema;Paul M.G. Emmelkamp

  • Clinical Recovery in First-Episode Psychosis

    Lex Wunderink;Sjoerd Sytema;Fokko J. Nienhuis;Durk Wiersma

  • The psychometric properties of the Vineland Adaptive Behavior Scales in children and adolescents with mental retardation.

    Annelies de Bildt;Dirk Kraijer;Sjoerd Sytema;Ruud Minderaa

  • Adaptive functioning and behaviour problems in relation to level of education in children and adolescents with intellectual disability.

    A de Bildt;Sjoerd Sytema;D Kraijer;S Sparrow

  • Prevalence of Pervasive Developmental Disorders in Children and Adolescents with Mental Retardation.

    Annelies de Bildt;Sjoerd Sytema;Dirk Kraijer;Ruud Minderaa

  • Assertive community treatment in the Netherlands: a randomized controlled trial.

    Sjoerd Sytema;L. Wunderink;W. Bloemers;L. Roorda

  • E–Mental Health Self-Management for Psychotic Disorders: State of the Art and Future Perspectives

    Lian van der Krieke;Lex Wunderink;Ando C. Emerencia;Peter de Jonge

  • Are sexual side effects of prolactin-raising antipsychotics reducible to serum prolactin?

    Henderikus Knegtering;Henderikus Knegtering;Rob van den Bosch;Stynke Castelein;Richard Bruggeman

  • Behavioral Parent Training as an Adjunct to Routine Care in Children with Attention-Deficit/Hyperactivity Disorder: Moderators of Treatment Response

    Barbara J. van den Hoofdakker;Maaike H. Nauta;Lianne van der Veen-Mulders;Sjoerd Sytema

  • Propensity to psychiatric and somatic ill-health: evidence from a birth cohort.

    J Neeleman;Sjoerd Sytema;M Wadsworth

  • Continuity of care for patients with schizophrenia and related disorders: a comparative South-Verona and Groningen case register study.

    S Sytema;R Micciolo;M Tansella

  • Brief report: Adults with mild autism spectrum disorders (ASD): Scores on the autism spectrum quotient (AQ) and comorbid psychopathology

    Cees Ketelaars;Ernst Horwitz;Sjoerd Sytema;Johan Bos

  • A web-based tool to support shared decision making for people with a psychotic disorder: randomized controlled trial and process evaluation.

    Lian van der Krieke;Ando C Emerencia;Nynke Boonstra;Lex Wunderink

  • Positive and useful auditory vocal hallucinations: prevalence, characteristics, attributions, and implications for treatment.

    J. A. Jenner;S. Rutten;J. Beuckens;N. Boonstra

  • Social skills in children with intellectual disabilities with and without autism

    A de Bildt;M Serra;E Luteijn;D Kraijer

  • Predictive Validity of Proposed Remission Criteria in First-Episode Schizophrenic Patients Responding to Antipsychotics

    Lex Wunderink;Fokko J. Nienhuis;Sjoerd Sytema;Durk Wiersma

  • Autism Diagnostic Interview-Revised (ADI-R) Algorithms for Toddlers and Young Preschoolers: Application in a Non-US Sample of 1,104 Children

    Annelies de Bildt;Sjoerd Sytema;Eric Zander;Eric Zander;Sven Bölte;Sven Bölte

Frequent Co-Authors

Jim van Os
Jim van Os University Medical Center Utrecht
Marjan Drukker
Marjan Drukker Maastricht University
Rob R. Meijer
Rob R. Meijer University of Groningen
Ruud B. Minderaa
Ruud B. Minderaa University of Groningen
Peter de Jonge
Peter de Jonge University of Groningen
Maaike H. Nauta
Maaike H. Nauta University of Groningen
Paul M. G. Emmelkamp
Paul M. G. Emmelkamp University of Amsterdam
Marco Aiello
Marco Aiello University of Stuttgart
Marieke Wichers
Marieke Wichers Maastricht University
Henk Nijman
Henk Nijman Radboud University

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