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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Psychology 36 9627 9007 89 85 119 4234

Trond Nordfjærn publications per year

The chart shows the history of publications by Trond Nordfjærn between 2009 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Trond Nordfjærn published across 17 years, from 2009 to 2025, averaging 9 papers a year. Output peaked at 17 publications in 2019. 8 of the 153 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 2009 to 2025. Vertical axis: number of publications, 0 to 17. Peak 17 publications in 2019. 2009: 1 publication 2010: 4 publications 2011: 6 publications 2012: 9 publications 2013: 11 publications 2014: 11 publications 2015: 13 publications 2016: 9 publications 2017: 11 publications 2018: 13 publications 2019: 17 publications 2020: 6 publications 2021: 14 publications 2022: 14 publications 2023: 6 publications 2024: 4 publications 2025: 4 publications
2009 2025

153 publications in total across all disciplines

View publications per year as a table
Trond Nordfjærn: publications per year, 2009 to 2025
Year Publications
2009 1
2010 4
2011 6
2012 9
2013 11
2014 11
2015 13
2016 9
2017 11
2018 13
2019 17
2020 6
2021 14
2022 14
2023 6
2024 4
2025 4
Total 153
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Trond Nordfjærn publications per year - data summary

  • Trond Nordfjærn, a Psychology scholar from Norwegian University of Science and Technology, has 153 publications recorded across 17 years, from 2009 to 2025.
  • The oldest publication on record dates to 2009 and the most recent to 2025.
  • The most productive year is 2019, with 17 publications.
  • The least productive year with any output is 2009, with 1 publication.
  • The rate of publication averages 9.0 papers per year over the whole span, or 9.0 per year counting only the 17 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 42 publications, 27% of the career total.
  • Split into equal eras - 2009-2014: 42 publications (7.0 per year); 2015-2020: 69 publications (11.5 per year); 2021-2025: 42 publications (8.4 per year).
  • Comparing the opening and closing eras, the overall trend of publication is broadly steady.

Trond Nordfjærn 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 Trond Nordfjærn 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, 111–120 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: 119 publications — 32nd percentile

32% 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
111–120 686 119
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
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Trond Nordfjærn 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.
  • Trond Nordfjærn, a Psychology scholar from Norwegian University of Science and Technology, records 119 publications - the 32nd percentile of the discipline.
  • 32% of ranked Psychology scientists score the same or lower than Trond Nordfjærn, and about 68% score higher.
  • The median of the discipline falls in the 151–160 publications range, and Trond Nordfjærn 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).

Trond Nordfjærn 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 Trond Nordfjærn 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, 36–37 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: 36 D-Index — 19th percentile

19% 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 36
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
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Trond Nordfjærn 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.
  • Trond Nordfjærn, a Psychology scholar from Norwegian University of Science and Technology, records 36 D-Index - the 19th percentile of the discipline.
  • 19% of ranked Psychology scientists score the same or lower than Trond Nordfjærn, and about 81% score higher.
  • The median of the discipline falls in the 48–49 D-Index range, and Trond Nordfjærn 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).

Research.com Recognitions

  • Member of the Norwegian Academy of Science and Letters Psychology and Education
  • Member of the Norwegian Academy of Science and Letters Psychology and Education
  • Member of the Norwegian Academy of Science and Letters Psychology and Education
  • Member of the Norwegian Academy of Science and Letters Psychology and Education

Overview

Trond Nordfjærn is affiliated with the Norwegian University of Science and Technology in Norway. The research focuses on interdisciplinary areas bridging psychology, engineering, and social sciences with an emphasis on transportation and safety.

The scientist's main fields of study include:

  • Psychology
  • Engineering
  • Social Sciences

Within these fields, their work extends to several subfields such as:

  • Transportation
  • General Health Professions
  • Safety, Risk, Reliability and Quality
  • Social Psychology
  • Automotive Engineering

The research topics addressed cover a range of issues primarily related to urban and transport systems, including:

  • Urban Transport and Accessibility
  • Traffic and Road Safety
  • Transportation and Mobility Innovations
  • Transportation Planning and Optimization
  • Electric Vehicles and Infrastructure
  • Mental Health Treatment and Access
  • Human-Automation Interaction and Safety

Recent published papers illustrate these thematic areas clearly:

  • A systematic review of the agent-based modelling/simulation paradigm in mobility transition, 2022, Technological Forecasting and Social Change
  • Active travel as a pro-environmental behaviour: An integrated framework, 2020, Transportation Research Part D Transport and Environment
  • Structural equation modelling of potential risk factors for pedestrian accidents in rural and urban roads, 2020, International Journal of Injury Control and Safety Promotion
  • Demand for mitigating the risk of COVID-19 infection in public transport: The role of social trust and fatalistic beliefs, 2021, Transportation Research Part F Traffic Psychology and Behaviour
  • Estimating financial compensation and minimum guaranteed charge for vehicle-to-grid technology, 2023, Energy Policy

The venues where this research is frequently published also indicate a focus on traffic psychology, injury prevention, and transportation studies:

  • Transportation Research Part F Traffic Psychology and Behaviour
  • SSRN Electronic Journal
  • International Journal of Injury Control and Safety Promotion
  • Travel Behaviour and Society
  • Accident Analysis & Prevention

Collaborations are a significant aspect of this scientist's work. Frequent co-authors include:

  • Milad Mehdizadeh
  • Mohsen Fallah Zavareh
  • Christian A. Klöckner
  • Dagny Adriaenssen Johannessen
  • Amy Østertun Geirdal

Recognition includes membership in the Norwegian Academy of Science and Letters, highlighting contributions in psychology and education.

Best Publications

  • The value-belief-norm theory, personal norms and sustainable travel mode choice in urban areas

    Hans Brende Lind;Trond Nordfjærn;Stig Halvard Jørgensen;Torbjørn Rundmo

  • The role of attitudes, transport priorities, and car use habit for travel mode use and intentions to use public transportation in an urban Norwegian public

    Özlem Şimşekoğlu;Trond Nordfjærn;Torbjørn Rundmo

  • Relapse after inpatient substance use treatment: A prospective cohort study among users of illicit substances

    Helle Wessel Andersson;Merethe Wenaas;Trond Nordfjærn

  • A cross‐cultural comparison of road traffic risk perceptions, attitudes towards traffic safety and driver behaviour

    Trond Nordfjærn;Stig Jørgensen;Torbjorn Rundmo

  • The role of risk perception and other risk-related judgements in transportation mode use

    Torbjørn Rundmo;Trond Nordfjærn;Hilde Hestad Iversen;Sigve Oltedal

  • Perceptions of traffic risk in an industrialised and a developing country

    Trond Nordfjærn;Torbjørn Rundmo

  • The role of deliberate planning, car habit and resistance to change in public transportation mode use

    Trond Nordfjærn;Özlem Şimşekoğlu;Torbjørn Rundmo

  • Risk perceptions, fatalism and driver behaviors in Turkey and Iran

    Özlem Şimşekoğlu;Trond Nordfjærn;Mohsen Fallah Zavareh;Amin Mohamadi Hezaveh

  • Co-occurrence between mental distress and poly-drug use: a ten year prospective study of patients from substance abuse treatment.

    Jasmina Burdzovic Andreas;Grethe Lauritzen;Trond Nordfjærn

  • An investigation of driver attitudes and behaviour in rural and urban areas in Norway.

    Trond Nordfjærn;Stig Halvard Jørgensen;Torbjørn Rundmo

  • Culture related to road traffic safety: a comparison of eight countries using two conceptualizations of culture.

    Trond Nordfjærn;Özlem Şimşekoğlu;Torbjorn Rundmo

  • Treatment and recovery as perceived by patients with substance addiction

    T Nordfjaern;T Rundmo;R Hole

  • The role of cultural factors and attitudes for pedestrian behaviour in an urban Turkish sample

    Trond Nordfjærn;Özlem Şimşekoğlu

  • Traffic risk perception, road safety attitudes, and behaviors among road users: a comparison of Turkey and Norway

    Özlem Şimşekoğlu;Trond Nordfjærn;Torbjørn Rundmo

  • Predictors of Dropout From Inpatient Substance Use Treatment: A Prospective Cohort Study.

    Helle Wessel Andersson;Aslak Steinsbekk;Espen Walderhaug;Eli Otterholt

  • Errors and violations in relation to bicyclists’ crash risks: Development of the Bicycle Rider Behavior Questionnaire (BRBQ)

    Amin Mohamadi Hezaveh;Mohsen Fallah Zavareh;Christopher R. Cherry;Trond Nordfjærn

  • Driver behaviour and crash involvement among professional taxi and truck drivers: Light passenger cars versus heavy goods vehicles

    Milad Mehdizadeh;Afshin Shariat-Mohaymany;Trond Nordfjaern

  • Accident involvement among Iranian lorry drivers: Direct and indirect effects of background variables and aberrant driving behaviour

    Milad Mehdizadeh;Afshin Shariat-Mohaymany;Trond Nordfjaern

  • Walking time to school, children's active school travel and their related factors

    Milad Mehdizadeh;Milad Mehdizadeh;AmirReza Mamdoohi;Trond Nordfjaern

  • The role of socio-economic, built environment and psychological factors in parental mode choice for their children in an Iranian setting

    Milad Mehdizadeh;Trond Nordfjaern;AmirReza Mamdoohi

  • Religiosity and Alcohol Use: Is Religiosity Important for Abstention and Consumption Levels in the Second Half of Life?

    Trond Nordfjærn

  • Transport priorities, risk perception and worry associated with mode use and preferences among Norwegian commuters.

    Trond Nordfjærn;Özlem Şimşekoğlu;Hans Brende Lind;Stig Halvard Jørgensen

Frequent Co-Authors

Torbjørn Rundmo
Torbjørn Rundmo Norwegian University of Science and Technology
Michael Berk
Michael Berk Deakin University
Ottar Bjerkeset
Ottar Bjerkeset Nord University
Meaghan O'Donnell
Meaghan O'Donnell University of Melbourne
Ingeborg Rossow
Ingeborg Rossow Norwegian Institute of Public Health

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