World's Best Scientists 2026 revealed!
Daniel S. O'Leary

Daniel S. O'Leary

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Neuroscience 88 1204 1085 614 540 233 29057

Daniel S. O'Leary publications per year

The chart shows the history of publications by Daniel S. O'Leary between 1977 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Daniel S. O'Leary published across 49 years, from 1977 to 2025, averaging 5.3 papers a year. Output peaked at 19 publications in 1996. 3 of the 259 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1977 to 2025. Vertical axis: number of publications, 0 to 19. Peak 19 publications in 1996. 1977: 1 publication 1978: 0 publications 1979: 0 publications 1980: 1 publication 1981: 5 publications 1982: 0 publications 1983: 3 publications 1984: 1 publication 1985: 1 publication 1986: 0 publications 1987: 0 publications 1988: 1 publication 1989: 2 publications 1990: 5 publications 1991: 2 publications 1992: 1 publication 1993: 9 publications 1994: 9 publications 1995: 18 publications 1996: 19 publications 1997: 14 publications 1998: 10 publications 1999: 11 publications 2000: 19 publications 2001: 12 publications 2002: 10 publications 2003: 14 publications 2004: 5 publications 2005: 1 publication 2006: 4 publications 2007: 3 publications 2008: 1 publication 2009: 7 publications 2010: 3 publications 2011: 0 publications 2012: 3 publications 2013: 3 publications 2014: 0 publications 2015: 5 publications 2016: 2 publications 2017: 2 publications 2018: 10 publications 2019: 5 publications 2020: 14 publications 2021: 13 publications 2022: 2 publications 2023: 5 publications 2024: 2 publications 2025: 1 publication
1977 2025

259 publications in total across all disciplines

View publications per year as a table
Daniel S. O'Leary: publications per year, 1977 to 2025
Year Publications
1977 1
1978 0
1979 0
1980 1
1981 5
1982 0
1983 3
1984 1
1985 1
1986 0
1987 0
1988 1
1989 2
1990 5
1991 2
1992 1
1993 9
1994 9
1995 18
1996 19
1997 14
1998 10
1999 11
2000 19
2001 12
2002 10
2003 14
2004 5
2005 1
2006 4
2007 3
2008 1
2009 7
2010 3
2011 0
2012 3
2013 3
2014 0
2015 5
2016 2
2017 2
2018 10
2019 5
2020 14
2021 13
2022 2
2023 5
2024 2
2025 1
Total 259
Download as CSV

Daniel S. O'Leary publications per year - data summary

  • Daniel S. O'Leary, a Neuroscience scholar from University of Iowa, has 259 publications recorded across 49 years, from 1977 to 2025.
  • The oldest publication on record dates to 1977 and the most recent to 2025.
  • The most productive years are 1996 and 2000, with 19 publications each.
  • The least productive years with any output are 1977, 1980, 1984, 1985 and others, with 1 publication each.
  • 7 of the 49 years in the span carry no publications at all (1978, 1979, 1982, 1986 and others).
  • The rate of publication averages 5.3 papers per year over the whole span, or 6.2 per year counting only the 42 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 23 publications, 9% of the career total.
  • Split into equal eras - 1977-1993: 32 publications (1.9 per year); 1994-2010: 160 publications (9.4 per year); 2011-2025: 67 publications (4.5 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Daniel S. O'Leary publication distribution in Neuroscience in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Neuroscience in 2026. The highlighted bar marks where Daniel S. O'Leary sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 86 bars. Horizontal axis: publications, 38–47 to 887+. Vertical axis: number of scientists, 0 to 539. Most scientists, 539, have 98–107 publications. The last bar groups every scientist with 887 publications or more. The highlighted bar, 228–237 publications, is where this scientist sits. 38–47 publications: 18 scientists 48–57 publications: 79 scientists 58–67 publications: 193 scientists 68–77 publications: 323 scientists 78–87 publications: 406 scientists 88–97 publications: 452 scientists 98–107 publications: 539 scientists 108–117 publications: 505 scientists 118–127 publications: 522 scientists 128–137 publications: 469 scientists 138–147 publications: 456 scientists 148–157 publications: 459 scientists 158–167 publications: 397 scientists 168–177 publications: 383 scientists 178–187 publications: 350 scientists 188–197 publications: 302 scientists 198–207 publications: 306 scientists 208–217 publications: 262 scientists 218–227 publications: 242 scientists 228–237 publications: 220 scientists 238–247 publications: 203 scientists 248–257 publications: 174 scientists 258–267 publications: 176 scientists 268–277 publications: 175 scientists 278–287 publications: 125 scientists 288–297 publications: 116 scientists 298–307 publications: 127 scientists 308–317 publications: 128 scientists 318–327 publications: 99 scientists 328–337 publications: 89 scientists 338–347 publications: 78 scientists 348–357 publications: 96 scientists 358–367 publications: 66 scientists 368–377 publications: 59 scientists 378–387 publications: 65 scientists 388–397 publications: 54 scientists 398–407 publications: 48 scientists 408–417 publications: 49 scientists 418–427 publications: 34 scientists 428–437 publications: 31 scientists 438–447 publications: 30 scientists 448–457 publications: 31 scientists 458–467 publications: 36 scientists 468–477 publications: 40 scientists 478–487 publications: 35 scientists 488–497 publications: 30 scientists 498–507 publications: 23 scientists 508–517 publications: 26 scientists 518–527 publications: 20 scientists 528–537 publications: 23 scientists 538–547 publications: 20 scientists 548–557 publications: 20 scientists 558–567 publications: 17 scientists 568–577 publications: 14 scientists 578–587 publications: 20 scientists 588–597 publications: 20 scientists 598–607 publications: 19 scientists 608–617 publications: 18 scientists 618–627 publications: 17 scientists 628–637 publications: 11 scientists 638–647 publications: 11 scientists 648–657 publications: 11 scientists 658–667 publications: 8 scientists 668–677 publications: 7 scientists 678–687 publications: 11 scientists 688–697 publications: 10 scientists 698–707 publications: 4 scientists 708–717 publications: 6 scientists 718–727 publications: 5 scientists 728–737 publications: 5 scientists 738–747 publications: 9 scientists 748–757 publications: 9 scientists 758–767 publications: 3 scientists 768–777 publications: 7 scientists 778–787 publications: 7 scientists 788–797 publications: 6 scientists 798–807 publications: 2 scientists 808–817 publications: 2 scientists 818–827 publications: 7 scientists 828–837 publications: 0 scientists 838–847 publications: 9 scientists 848–857 publications: 3 scientists 858–867 publications: 1 scientist 868–877 publications: 3 scientists 878–886 publications: 6 scientists 887+ publications: 100 scientists
38–47 publications 887+

This scientist: 233 publications — 71st percentile

71% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 887 publications or more.

View publications distribution as a table
Number of Neuroscience scientists by publication count, Research.com 2026 ranking edition. Based on 9,597 ranked scientists.
Publications Scientists This scientist
38–47 18
48–57 79
58–67 193
68–77 323
78–87 406
88–97 452
98–107 539
108–117 505
118–127 522
128–137 469
138–147 456
148–157 459
158–167 397
168–177 383
178–187 350
188–197 302
198–207 306
208–217 262
218–227 242
228–237 220 233
238–247 203
248–257 174
258–267 176
268–277 175
278–287 125
288–297 116
298–307 127
308–317 128
318–327 99
328–337 89
338–347 78
348–357 96
358–367 66
368–377 59
378–387 65
388–397 54
398–407 48
408–417 49
418–427 34
428–437 31
438–447 30
448–457 31
458–467 36
468–477 40
478–487 35
488–497 30
498–507 23
508–517 26
518–527 20
528–537 23
538–547 20
548–557 20
558–567 17
568–577 14
578–587 20
588–597 20
598–607 19
608–617 18
618–627 17
628–637 11
638–647 11
648–657 11
658–667 8
668–677 7
678–687 11
688–697 10
698–707 4
708–717 6
718–727 5
728–737 5
738–747 9
748–757 9
758–767 3
768–777 7
778–787 7
788–797 6
798–807 2
808–817 2
818–827 7
828–837 0
838–847 9
848–857 3
858–867 1
868–877 3
878–886 6
887+ 100
Download as CSV

Daniel S. O'Leary publication distribution in Neuroscience in 2026 - data summary

  • The chart plots the publication count of all 9,597 Neuroscience scientists ranked by Research.com in 2026, grouped into 86 ranges running from 38–47 to 887+ publications.
  • Daniel S. O'Leary, a Neuroscience scholar from University of Iowa, records 233 publications - the 71st percentile of the discipline.
  • 71% of ranked Neuroscience scientists score the same or lower than Daniel S. O'Leary, and about 29% score higher.
  • The median of the discipline falls in the 158–167 publications range, and Daniel S. O'Leary ranks above the median.
  • The most crowded range is 98–107 publications, holding 539 scientists (6% of the field).
  • 76% of the field sits in the lowest quarter of the value range (up to 248–257 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 887 publications or more, 100 scientists in all (1% of the field).

Daniel S. O'Leary D-index placement in Neuroscience in 2026

The chart shows the D-index (discipline H-index) distribution of Neuroscience scientists ranked by Research.com in 2026. The highlighted bar marks where Daniel S. O'Leary sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 68 bars. Horizontal axis: D-Index, 30–31 to 163+. Vertical axis: number of scientists, 0 to 512. Most scientists, 512, have 46–47 D-Index. The last bar groups every scientist with 163 D-Index or more. The highlighted bar, 88–89 D-Index, is where this scientist sits. 30–31 D-Index: 42 scientists 32–33 D-Index: 172 scientists 34–35 D-Index: 296 scientists 36–37 D-Index: 435 scientists 38–39 D-Index: 459 scientists 40–41 D-Index: 456 scientists 42–43 D-Index: 467 scientists 44–45 D-Index: 478 scientists 46–47 D-Index: 512 scientists 48–49 D-Index: 435 scientists 50–51 D-Index: 425 scientists 52–53 D-Index: 418 scientists 54–55 D-Index: 392 scientists 56–57 D-Index: 357 scientists 58–59 D-Index: 334 scientists 60–61 D-Index: 328 scientists 62–63 D-Index: 260 scientists 64–65 D-Index: 278 scientists 66–67 D-Index: 239 scientists 68–69 D-Index: 250 scientists 70–71 D-Index: 210 scientists 72–73 D-Index: 200 scientists 74–75 D-Index: 189 scientists 76–77 D-Index: 170 scientists 78–79 D-Index: 146 scientists 80–81 D-Index: 113 scientists 82–83 D-Index: 126 scientists 84–85 D-Index: 100 scientists 86–87 D-Index: 84 scientists 88–89 D-Index: 99 scientists 90–91 D-Index: 84 scientists 92–93 D-Index: 85 scientists 94–95 D-Index: 72 scientists 96–97 D-Index: 76 scientists 98–99 D-Index: 45 scientists 100–101 D-Index: 49 scientists 102–103 D-Index: 43 scientists 104–105 D-Index: 32 scientists 106–107 D-Index: 45 scientists 108–109 D-Index: 50 scientists 110–111 D-Index: 32 scientists 112–113 D-Index: 39 scientists 114–115 D-Index: 32 scientists 116–117 D-Index: 29 scientists 118–119 D-Index: 27 scientists 120–121 D-Index: 19 scientists 122–123 D-Index: 23 scientists 124–125 D-Index: 27 scientists 126–127 D-Index: 16 scientists 128–129 D-Index: 24 scientists 130–131 D-Index: 13 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 17 scientists 136–137 D-Index: 14 scientists 138–139 D-Index: 15 scientists 140–141 D-Index: 10 scientists 142–143 D-Index: 10 scientists 144–145 D-Index: 13 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 8 scientists 150–151 D-Index: 6 scientists 152–153 D-Index: 6 scientists 154–155 D-Index: 7 scientists 156–157 D-Index: 7 scientists 158–159 D-Index: 10 scientists 160–161 D-Index: 4 scientists 162 D-Index: 8 scientists 163+ D-Index: 100 scientists
30–31 D-Index 163+

This scientist: 88 D-Index — 88th percentile

88% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 163 D-Index or more.

View D-Index distribution as a table
Number of Neuroscience scientists by D-index, Research.com 2026 ranking edition. Based on 9,597 ranked scientists.
D-Index Scientists This scientist
30–31 42
32–33 172
34–35 296
36–37 435
38–39 459
40–41 456
42–43 467
44–45 478
46–47 512
48–49 435
50–51 425
52–53 418
54–55 392
56–57 357
58–59 334
60–61 328
62–63 260
64–65 278
66–67 239
68–69 250
70–71 210
72–73 200
74–75 189
76–77 170
78–79 146
80–81 113
82–83 126
84–85 100
86–87 84
88–89 99 88
90–91 84
92–93 85
94–95 72
96–97 76
98–99 45
100–101 49
102–103 43
104–105 32
106–107 45
108–109 50
110–111 32
112–113 39
114–115 32
116–117 29
118–119 27
120–121 19
122–123 23
124–125 27
126–127 16
128–129 24
130–131 13
132–133 21
134–135 17
136–137 14
138–139 15
140–141 10
142–143 10
144–145 13
146–147 9
148–149 8
150–151 6
152–153 6
154–155 7
156–157 7
158–159 10
160–161 4
162 8
163+ 100
Download as CSV

Daniel S. O'Leary D-index placement in Neuroscience in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 9,597 Neuroscience scientists ranked by Research.com in 2026, grouped into 68 ranges running from 30–31 to 163+ D-Index.
  • Daniel S. O'Leary, a Neuroscience scholar from University of Iowa, records 88 D-Index - the 88th percentile of the discipline.
  • 88% of ranked Neuroscience scientists score the same or lower than Daniel S. O'Leary, and about 12% score higher.
  • The median of the discipline falls in the 54–55 D-Index range, and Daniel S. O'Leary ranks above the median.
  • The most crowded range is 46–47 D-Index, holding 512 scientists (5% of the field).
  • 65% of the field sits in the lowest quarter of the value range (up to 62–63 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 163 D-Index or more, 100 scientists in all (1% of the field).

Overview

Daniel S. O'Leary is affiliated with the University of Iowa in the United States. The primary areas of their research focus include Neuroscience and Medicine, with notable contributions to subfields such as Cognitive Neuroscience, Radiology, Nuclear Medicine and Imaging, Experimental and Cognitive Psychology, Genetics, and Pharmacology.

The scientist's work extensively covers a range of topics, prominently featuring Functional Brain Connectivity Studies, Advanced Neuroimaging Techniques and Applications, Neural dynamics and brain function, Mental Health Research Topics, Advanced MRI Techniques and Applications, Genetic Associations and Epidemiology, and Cannabis and Cannabinoid Research.

Recent papers authored or co-authored by Daniel S. O'Leary include the following:

  • "Nonlinear functional network connectivity in resting functional magnetic resonance imaging data" (2022, Human Brain Mapping)
  • "Sparse deep neural networks on imaging genetics for schizophrenia case-control classification" (2021, Human Brain Mapping)
  • "A method for estimating and characterizing explicitly nonlinear dynamic functional network connectivity in resting-state fMRI data" (2023, Journal of Neuroscience Methods)
  • "Recreational Marijuana Use, Adolescent Cognitive Development, and Schizophrenia Susceptibility" (2022, Biological Psychiatry Global Open Science)
  • "Impact of binge drinking during college on resting state functional connectivity" (2021, Drug and Alcohol Dependence)

Frequent co-authors who have collaborated with Daniel S. O'Leary include:

  • Daniel H. Mathalon
  • Ayşenil Belger
  • Vince D. Calhoun
  • Judith M. Ford
  • Bryon A. Mueller

Their research has been published in a variety of venues, with multiple publications appearing in journals and repositories such as:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • UNC Libraries
  • Psychiatry Research Neuroimaging
  • Human Brain Mapping
  • Drug and Alcohol Dependence

Best Publications

  • “Cognitive Dysmetria” as an Integrative Theory of Schizophrenia: A Dysfunction in Cortical-Subcortical-Cerebellar Circuitry?

    Nancy C. Andreasen;Sergio Paradiso;Daniel S. O'Leary

  • Hypofrontality in neuroleptic-naive patients and in patients with chronic schizophrenia. Assessment with xenon 133 single-photon emission computed tomography and the Tower of London.

    Nancy C. Andreasen;Karim Rezai;Randall Alliger;Victor W. Swayze

  • Cortical Brain Abnormalities in 4474 Individuals With Schizophrenia and 5098 Control Subjects via the Enhancing Neuro Imaging Genetics Through Meta Analysis (ENIGMA) Consortium

    Unknown

  • Thalamic abnormalities in schizophrenia visualized through magnetic resonance image averaging

    Nancy C. Andreasen;Stephan Arndt;Victor Swayze;Ted Cizadlo

  • The genetic architecture of the human cerebral cortex

    Katrina L. Grasby;Neda Jahanshad;Jodie N. Painter;Lucía Colodro-Conde

  • Schizophrenia and cognitive dysmetria: a positron-emission tomography study of dysfunctional prefrontal-thalamic-cerebellar circuitry.

    N C Andreasen;D S O'Leary;T Cizadlo;S Arndt

  • Remembering the past: two facets of episodic memory explored with positron emission tomography.

    Andreasen Nc;O'Leary Ds;Cizadlo T;Arndt S

  • Hypofrontality in schizophrenia: distributed dysfunctional circuits in neuroleptic-naïve patients

    Nancy C Andreasen;Daniel S O'Leary;Michael Flaum;Peg Nopoulos

  • Defining the phenotype of schizophrenia: cognitive dysmetria and its neural mechanisms

    Nancy C Andreasen;Peg Nopoulos;Peg Nopoulos;Daniel S O’Leary;Del D Miller;Del D Miller

  • Generalized Cognitive Deficits in Schizophrenia: A Study of First-Episode Patients

    Somaia Mohamed;Jane S. Paulsen;Daniel O'Leary;Stephen Arndt

  • Intelligence and Brain Structure in Normal Individuals

    Nancy C. Andreasen;Michael Flaum;Victor Swayze;Daniel S. O'Leary

  • Longitudinal study of cognitive function in first-episode and recent-onset schizophrenia.

    Sherri Gold;Stephan Arndt;Peg Nopoulos;Daniel S. O’Leary

  • Longitudinal assessment of premorbid cognitive functioning in patients with schizophrenia through examination of standardized Scholastic test performance

    Rebecca Fuller;Peg Nopoulos;Stephan Arndt;Dan O’Leary

  • Regional Brain Abnormalities in Schizophrenia Measured With Magnetic Resonance Imaging

    Nancy C. Andreasen;Laura Flashman;Michael Flaum;Stephan Arndt

  • Cerebral blood flow changes associated with attribution of emotional valence to pleasant, unpleasant, and neutral visual stimuli in a PET study of normal subjects.

    Sergio Paradiso;Debra L. Johnson;Nancy C. Andreasen;Daniel S. O’Leary

  • Sexual dimorphism in the human brain: evaluation of tissue volume, tissue composition and surface anatomy using magnetic resonance imaging.

    Peg Nopoulos;Michael Flaum;Dan O’Leary;Nancy C Andreasen

  • Cognitive Correlates of the Negative, Disorganized, and Psychotic Symptom Dimensions of Schizophrenia

    Daniel S. O'Leary;Michael Flaum;Marilyn L. Kesler;Laura A. Flashman

  • The neurodevelopmental impact of childhood-onset temporal lobe epilepsy on brain structure and function.

    Bruce Hermann;Michael Seidenberg;Brian Bell;Paul Rutecki

  • Working memory and DLPFC inefficiency in schizophrenia: The FBIRN study

    S. G. Potkin;J. A. Turner;G. G. Brown;G. McCarthy

  • The Neuropsychology of the Prefrontal Cortex

    Karim Rezai;Nancy C. Andreasen;Randy Alliger;Gregg Cohen

  • Automatic atlas-based volume estimation of human brain regions from MR images.

    Nancy C. Andreasen;R. Rajarethinam;Theodore Cizadlo;Stephan Arndt

Frequent Co-Authors

Nancy C. Andreasen
Nancy C. Andreasen University of Iowa
Richard D. Hichwa
Richard D. Hichwa University of Iowa
Stephan Arndt
Stephan Arndt University of Iowa
Vincent A. Magnotta
Vincent A. Magnotta University of Iowa
Laura L. Boles Ponto
Laura L. Boles Ponto University of Iowa Hospitals and Clinics
Daniel H. Mathalon
Daniel H. Mathalon University of California, San Francisco
Jessica A. Turner
Jessica A. Turner The Ohio State University
Vince D. Calhoun
Vince D. Calhoun Georgia State University
Aysenil Belger
Aysenil Belger University of North Carolina at Chapel Hill
Benedicto Crespo-Facorro
Benedicto Crespo-Facorro University of Seville

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Best Scientists Citing Daniel S. O'Leary

Trending Scientists

Recently Published Articles