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Alfgeir L. Kristjansson

Alfgeir L. Kristjansson

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Social Sciences and Humanities 39 5721 5313 2707 2468 142 5555

Alfgeir L. Kristjansson publications per year

The chart shows the history of publications by Alfgeir L. Kristjansson between 2006 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Alfgeir L. Kristjansson published across 20 years, from 2006 to 2025, averaging 7.8 papers a year. Output peaked at 18 publications in 2021. 20 of the 156 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 2006 to 2025. Vertical axis: number of publications, 0 to 18. Peak 18 publications in 2021. 2006: 2 publications 2007: 1 publication 2008: 6 publications 2009: 5 publications 2010: 7 publications 2011: 6 publications 2012: 5 publications 2013: 7 publications 2014: 8 publications 2015: 10 publications 2016: 6 publications 2017: 14 publications 2018: 8 publications 2019: 5 publications 2020: 15 publications 2021: 18 publications 2022: 5 publications 2023: 8 publications 2024: 11 publications 2025: 9 publications
2006 2025

156 publications in total across all disciplines

View publications per year as a table
Alfgeir L. Kristjansson: publications per year, 2006 to 2025
Year Publications
2006 2
2007 1
2008 6
2009 5
2010 7
2011 6
2012 5
2013 7
2014 8
2015 10
2016 6
2017 14
2018 8
2019 5
2020 15
2021 18
2022 5
2023 8
2024 11
2025 9
Total 156
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Alfgeir L. Kristjansson publication distribution in Social Sciences and Humanities in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Social Sciences and Humanities in 2026. The highlighted bar marks where Alfgeir L. Kristjansson sits on this spectrum.

No. of scientists
100 200 300 400
Bar chart with 54 bars. Horizontal axis: publications, 44–53 to 570+. Vertical axis: number of scientists, 0 to 474. Most scientists, 474, have 114–123 publications. The last bar groups every scientist with 570 publications or more. The highlighted bar, 134–143 publications, is where this scientist sits. 44–53 publications: 28 scientists 54–63 publications: 61 scientists 64–73 publications: 161 scientists 74–83 publications: 225 scientists 84–93 publications: 301 scientists 94–103 publications: 390 scientists 104–113 publications: 406 scientists 114–123 publications: 474 scientists 124–133 publications: 453 scientists 134–143 publications: 434 scientists 144–153 publications: 407 scientists 154–163 publications: 411 scientists 164–173 publications: 391 scientists 174–183 publications: 313 scientists 184–193 publications: 319 scientists 194–203 publications: 304 scientists 204–213 publications: 285 scientists 214–223 publications: 246 scientists 224–233 publications: 213 scientists 234–243 publications: 170 scientists 244–253 publications: 167 scientists 254–263 publications: 162 scientists 264–273 publications: 138 scientists 274–283 publications: 138 scientists 284–293 publications: 113 scientists 294–303 publications: 106 scientists 304–313 publications: 95 scientists 314–323 publications: 101 scientists 324–333 publications: 81 scientists 334–343 publications: 69 scientists 344–353 publications: 56 scientists 354–363 publications: 36 scientists 364–373 publications: 42 scientists 374–383 publications: 41 scientists 384–393 publications: 44 scientists 394–403 publications: 27 scientists 404–413 publications: 30 scientists 414–423 publications: 20 scientists 424–433 publications: 29 scientists 434–443 publications: 29 scientists 444–453 publications: 25 scientists 454–463 publications: 19 scientists 464–473 publications: 21 scientists 474–483 publications: 11 scientists 484–493 publications: 17 scientists 494–503 publications: 7 scientists 504–513 publications: 6 scientists 514–523 publications: 12 scientists 524–533 publications: 10 scientists 534–543 publications: 7 scientists 544–553 publications: 6 scientists 554–563 publications: 12 scientists 564–569 publications: 8 scientists 570+ publications: 100 scientists
44–53 publications 570+

This scientist: 142 publications — 37th percentile

37% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 570 publications or more.

View publications distribution as a table
Number of Social Sciences and Humanities scientists by publication count, Research.com 2026 ranking edition. Based on 7,777 ranked scientists.
Publications Scientists This scientist
44–53 28
54–63 61
64–73 161
74–83 225
84–93 301
94–103 390
104–113 406
114–123 474
124–133 453
134–143 434 142
144–153 407
154–163 411
164–173 391
174–183 313
184–193 319
194–203 304
204–213 285
214–223 246
224–233 213
234–243 170
244–253 167
254–263 162
264–273 138
274–283 138
284–293 113
294–303 106
304–313 95
314–323 101
324–333 81
334–343 69
344–353 56
354–363 36
364–373 42
374–383 41
384–393 44
394–403 27
404–413 30
414–423 20
424–433 29
434–443 29
444–453 25
454–463 19
464–473 21
474–483 11
484–493 17
494–503 7
504–513 6
514–523 12
524–533 10
534–543 7
544–553 6
554–563 12
564–569 8
570+ 100
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Alfgeir L. Kristjansson D-index placement in Social Sciences and Humanities in 2026

The chart shows the D-index (discipline H-index) distribution of Social Sciences and Humanities scientists ranked by Research.com in 2026. The highlighted bar marks where Alfgeir L. Kristjansson sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 71 bars. Horizontal axis: D-Index, 30 to 100+. Vertical axis: number of scientists, 0 to 313. Most scientists, 313, have 42 D-Index. The last bar groups every scientist with 100 D-Index or more. The highlighted bar, 39 D-Index, is where this scientist sits. 30 D-Index: 177 scientists 31 D-Index: 210 scientists 32 D-Index: 222 scientists 33 D-Index: 188 scientists 34 D-Index: 181 scientists 35 D-Index: 243 scientists 36 D-Index: 261 scientists 37 D-Index: 272 scientists 38 D-Index: 278 scientists 39 D-Index: 300 scientists 40 D-Index: 297 scientists 41 D-Index: 308 scientists 42 D-Index: 313 scientists 43 D-Index: 300 scientists 44 D-Index: 269 scientists 45 D-Index: 260 scientists 46 D-Index: 228 scientists 47 D-Index: 251 scientists 48 D-Index: 203 scientists 49 D-Index: 186 scientists 50 D-Index: 187 scientists 51 D-Index: 166 scientists 52 D-Index: 138 scientists 53 D-Index: 141 scientists 54 D-Index: 131 scientists 55 D-Index: 137 scientists 56 D-Index: 109 scientists 57 D-Index: 129 scientists 58 D-Index: 95 scientists 59 D-Index: 105 scientists 60 D-Index: 106 scientists 61 D-Index: 86 scientists 62 D-Index: 94 scientists 63 D-Index: 77 scientists 64 D-Index: 79 scientists 65 D-Index: 59 scientists 66 D-Index: 68 scientists 67 D-Index: 51 scientists 68 D-Index: 49 scientists 69 D-Index: 40 scientists 70 D-Index: 43 scientists 71 D-Index: 40 scientists 72 D-Index: 50 scientists 73 D-Index: 46 scientists 74 D-Index: 43 scientists 75 D-Index: 45 scientists 76 D-Index: 45 scientists 77 D-Index: 30 scientists 78 D-Index: 25 scientists 79 D-Index: 31 scientists 80 D-Index: 29 scientists 81 D-Index: 18 scientists 82 D-Index: 21 scientists 83 D-Index: 26 scientists 84 D-Index: 15 scientists 85 D-Index: 15 scientists 86 D-Index: 19 scientists 87 D-Index: 19 scientists 88 D-Index: 12 scientists 89 D-Index: 7 scientists 90 D-Index: 19 scientists 91 D-Index: 20 scientists 92 D-Index: 13 scientists 93 D-Index: 9 scientists 94 D-Index: 13 scientists 95 D-Index: 8 scientists 96 D-Index: 7 scientists 97 D-Index: 6 scientists 98 D-Index: 6 scientists 99 D-Index: 6 scientists 100+ D-Index: 97 scientists
30 D-Index 100+

This scientist: 39 D-Index — 30th percentile

30% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 100 D-Index or more.

View D-Index distribution as a table
Number of Social Sciences and Humanities scientists by D-index, Research.com 2026 ranking edition. Based on 7,777 ranked scientists.
D-Index Scientists This scientist
30 177
31 210
32 222
33 188
34 181
35 243
36 261
37 272
38 278
39 300 39
40 297
41 308
42 313
43 300
44 269
45 260
46 228
47 251
48 203
49 186
50 187
51 166
52 138
53 141
54 131
55 137
56 109
57 129
58 95
59 105
60 106
61 86
62 94
63 77
64 79
65 59
66 68
67 51
68 49
69 40
70 43
71 40
72 50
73 46
74 43
75 45
76 45
77 30
78 25
79 31
80 29
81 18
82 21
83 26
84 15
85 15
86 19
87 19
88 12
89 7
90 19
91 20
92 13
93 9
94 13
95 8
96 7
97 6
98 6
99 6
100+ 97
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Overview

Alfgeir L. Kristjansson is affiliated with West Virginia University in the United States and has contributed extensively to research in the fields of psychology, social sciences, and medicine. Their work spans various subfields, including general health professions, clinical psychology, education, safety research, and public health, environmental and occupational health.

Their research primarily addresses topics related to child and adolescent development, youth support systems, community health, and the impacts of mental health challenges and substance use among young populations. Key thematic areas in their scholarly output include:

  • Child and Adolescent Psychosocial and Emotional Development
  • Youth Development and Social Support
  • Community Health and Development
  • Homelessness and Social Issues
  • COVID-19 and Mental Health
  • Youth Substance Use and School Attendance
  • Early Childhood Education and Development

Kristjansson's frequent coauthors include Michael J. Mann, Megan L. Smith, Christa Lilly, Inga Dóra Sigfúsdóttir, and Ingibjörg Eva Þórisdóttir. These collaborations indicate a focused research network.

They have published research in multiple reputable journals. Among the venues where Kristjansson's work appears most often are:

  • Journal of School Health
  • Health Promotion Practice
  • Journal of Adolescent Health
  • Substance Use & Misuse
  • Preventive Medicine

Significant recent papers by Kristjansson include:

  • "Depressive symptoms, mental wellbeing, and substance use among adolescents before and during the COVID-19 pandemic in Iceland: a longitudinal, population-based study" (2021, The Lancet Psychiatry)
  • "Substance Use Among Youth During the COVID-19 Pandemic: a Systematic Review" (2022, Current Psychiatry Reports)
  • "Adolescent well-being amid the COVID-19 pandemic: Are girls struggling more than boys?" (2021, JCPP Advances)
  • "Longitudinal association between social media use and psychological distress among adolescents" (2020, Preventive Medicine)
  • "Effect of the COVID-19 pandemic on adolescent mental health and substance use up to March, 2022, in Iceland: a repeated, cross-sectional, population-based study" (2023, The Lancet Child & Adolescent Health)

Best Publications

  • Health Behavior and Academic Achievement Among Adolescents: The Relative Contribution of Dietary Habits, Physical Activity, Body Mass Index, and Self-Esteem

    Alfgeir Logi Kristjánsson;Inga Dóra Sigfúsdóttir;John P Allegrante

  • Health behaviour and academic achievement in Icelandic school children

    Inga Dóra Sigfúsdóttir;Alfgeir Logi Kristjánsson;John P Allegrante

  • Depressive symptoms, mental wellbeing, and substance use among adolescents before and during the COVID-19 pandemic in Iceland: a longitudinal, population-based study.

    Ingibjorg Eva Thorisdottir;Bryndis Bjork Asgeirsdottir;Alfgeir Logi Kristjansson;Alfgeir Logi Kristjansson;Heiddis Bjork Valdimarsdottir;Heiddis Bjork Valdimarsdottir

  • Substance Use Among Youth During the COVID-19 Pandemic: a Systematic Review

    Unknown

  • Substance use prevention for adolescents: the Icelandic Model.

    Inga Dóra Sigfúsdóttir;Thorolfur Thorlindsson;Alfgeir Logi Kristjánsson;Kathleen M Roe

  • Adolescent substance use, parental monitoring, and leisure-time activities: 12-year outcomes of primary prevention in Iceland

    Alfgeir Logi Kristjansson;Alfgeir Logi Kristjansson;Jack E. James;John P. Allegrante;Inga Dora Sigfusdottir

  • Adolescent Substance Use, Sleep, and Academic Achievement: Evidence of Harm Due to Caffeine.

    Jack E. James;Álfgeir Logi Kristjánsson;Inga Dóra Sigfúsdóttir

  • Population trends in smoking, alcohol use and primary prevention variables among adolescents in Iceland, 1997-2014.

    Alfgeir L. Kristjansson;Alfgeir L. Kristjansson;Inga Dora Sigfusdottir;Inga Dora Sigfusdottir;Thorolfur Thorlindsson;Michael J. Mann

  • The Role of Parental Support, Parental Monitoring, and Time Spent with Parents in Adolescent Academic Achievement in Iceland: A Structural Model of Gender Differences.

    Álfgeir Logi Kristjánsson;Inga Dóra Sigfúsdóttir

  • A comparative analysis of general strain theory

    Inga Dora Sigfusdottir;Inga Dora Sigfusdottir;Alfgeir Logi Kristjansson;Robert Agnew

  • Parental divorce and adolescent cigarette smoking and alcohol use: assessing the importance of family conflict

    Alfgeir Logi Kristjansson;Inga Dora Sigfusdottir;John P. Allegrante;John P. Allegrante;Asgeir R Helgason;Asgeir R Helgason

  • School Climate and Academic Achievement in Middle and High School Students

    Shay M. Daily;Michael J. Mann;Alfgeir L. Kristjansson;Megan L. Smith

  • Licit and Illicit Substance Use by Adolescent E-Cigarette Users Compared with Conventional Cigarette Smokers, Dual Users, and Nonusers.

    Alfgeir L. Kristjansson;Alfgeir L. Kristjansson;Michael J. Mann;Inga Dora Sigfusdottir;Inga Dora Sigfusdottir

  • Social correlates of cigarette smoking among Icelandic adolescents: A population-based cross-sectional study

    Alfgeir L Kristjansson;Alfgeir L Kristjansson;Inga D Sigfusdottir;John P Allegrante;John P Allegrante;Asgeir R Helgason;Asgeir R Helgason;Asgeir R Helgason

  • Adolescent well-being amid the COVID-19 pandemic: Are girls struggling more than boys?

    Thorhildur Halldorsdottir;Ingibjorg Eva Thorisdottir;Caine C. A. Meyers;Bryndis Bjork Asgeirsdottir

  • Data Collection Procedures for School-Based Surveys Among Adolescents: The Youth in Europe Study

    Alfgeir Logi Kristjansson;Alfgeir Logi Kristjansson;Jon Sigfusson;Inga Dora Sigfusdottir;Inga Dora Sigfusdottir;John P. Allegrante

  • Stress and adolescent well-being: the need for an interdisciplinary framework.

    Inga Dora Sigfusdottir;Inga Dora Sigfusdottir;Alfgeir Logi Kristjansson;Thorolfur Thorlindsson;John P. Allegrante;John P. Allegrante

  • Development and Guiding Principles of the Icelandic Model for Preventing Adolescent Substance Use

    Alfgeir L Kristjansson;Alfgeir L Kristjansson;Michael J Mann;Jon Sigfusson;Ingibjorg E Thorisdottir

  • Trends in physical activity and participation in sports clubs among Icelandic adolescents.

    Sigríður Þ. Eiðsdóttir;Álfgeir L. Kristjánsson;Inga D. Sigfúsdóttir;John P. Allegrante;John P. Allegrante

  • Body weight dissatisfaction in the Icelandic adult population: a normative discontent?

    Erna Matthiasdottir;Stefan Hrafn Jonsson;Alfgeir Logi Kristjansson

  • Trends in prevalence of substance use among Icelandic adolescents, 1995–2006

    Inga D Sigfusdottir;Alfgeir L Kristjansson;Thorolfur Thorlindsson;John P Allegrante;John P Allegrante

  • Adolescent caffeine consumption and self-reported violence and conduct disorder

    Alfgeir L. Kristjansson;Alfgeir L. Kristjansson;Inga Dora Sigfusdottir;Inga Dora Sigfusdottir;Stephanie S. Frost;Jack E. James

  • Perceived parental reactions and peer respect as predictors of adolescent cigarette smoking and alcohol use

    Alfgeir Logi Kristjansson;Alfgeir Logi Kristjansson;Inga Dora Sigfusdottir;Jack E. James;Jack E. James;John P. Allegrante;John P. Allegrante

Frequent Co-Authors

Inga Dora Sigfusdottir
Inga Dora Sigfusdottir Reykjavík University
John P. Allegrante
John P. Allegrante Columbia University
Ásgeir R. Helgason
Ásgeir R. Helgason Karolinska Institute
Jack E. James
Jack E. James Reykjavík University
Keith J. Zullig
Keith J. Zullig West Virginia University
Heiddis B. Valdimarsdottir
Heiddis B. Valdimarsdottir Icahn School of Medicine at Mount Sinai
Stephen M. Davis
Stephen M. Davis University of Melbourne
Steven M. Kogan
Steven M. Kogan University of Georgia
Mika Gissler
Mika Gissler Finnish Institute for Health and Welfare
Michael Berk
Michael Berk Deakin University

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