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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Psychology 59 3642 3358 2045 1843 135 20627

Michael T. Ullman publications per year

The chart shows the history of publications by Michael T. Ullman between 1987 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Michael T. Ullman published across 39 years, from 1987 to 2025, averaging 3.8 papers a year. Output peaked at 11 publications in 2012. 9 of the 150 publications appeared in the last two years.

No. of publications
2 4 6 8 10
Bar chart. Horizontal axis: year, 1987 to 2025. Vertical axis: number of publications, 0 to 11. Peak 11 publications in 2012. 1987: 1 publication 1988: 1 publication 1989: 0 publications 1990: 0 publications 1991: 0 publications 1992: 1 publication 1993: 1 publication 1994: 0 publications 1995: 0 publications 1996: 0 publications 1997: 1 publication 1998: 0 publications 1999: 3 publications 2000: 3 publications 2001: 7 publications 2002: 5 publications 2003: 1 publication 2004: 1 publication 2005: 7 publications 2006: 7 publications 2007: 7 publications 2008: 4 publications 2009: 4 publications 2010: 6 publications 2011: 2 publications 2012: 11 publications 2013: 8 publications 2014: 4 publications 2015: 8 publications 2016: 5 publications 2017: 8 publications 2018: 4 publications 2019: 9 publications 2020: 8 publications 2021: 9 publications 2022: 4 publications 2023: 1 publication 2024: 6 publications 2025: 3 publications
1987 2025

150 publications in total across all disciplines

View publications per year as a table
Michael T. Ullman: publications per year, 1987 to 2025
Year Publications
1987 1
1988 1
1989 0
1990 0
1991 0
1992 1
1993 1
1994 0
1995 0
1996 0
1997 1
1998 0
1999 3
2000 3
2001 7
2002 5
2003 1
2004 1
2005 7
2006 7
2007 7
2008 4
2009 4
2010 6
2011 2
2012 11
2013 8
2014 4
2015 8
2016 5
2017 8
2018 4
2019 9
2020 8
2021 9
2022 4
2023 1
2024 6
2025 3
Total 150
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Michael T. Ullman 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 Michael T. Ullman 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, 131–140 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: 135 publications — 41st percentile

41% 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
131–140 644 135
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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Michael T. Ullman 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 Michael T. Ullman 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, 58–59 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: 59 D-Index — 68th percentile

68% 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 59
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

Michael T. Ullman is affiliated with Georgetown University in the United States. Their research primarily spans the fields of Psychology and Neuroscience, contributing 28 and 22 publications to these areas, respectively.

Their work encompasses several subfields, notably Cognitive Neuroscience and Developmental and Educational Psychology, each containing 22 publications. Additional subfields of focus include Experimental and Cognitive Psychology, Pediatrics, Perinatology and Child Health, and Social Psychology.

Key research topics addressed by Ullman include Neurobiology of Language and Bilingualism, Reading and Literacy Development, and Language Development and Disorders. Other themes involve Memory Processes and Influences, Child and Animal Learning Development, Functional Brain Connectivity Studies, and Action Observation and Synchronization.

Michael T. Ullman has authored multiple recent papers, including:

  • "Evidence that ageing yields improvements as well as declines across attention and executive functions" (2021) published in Nature Human Behaviour
  • "Subcortical Cognition: The Fruit Below the Rind" (2022) published in Annual Review of Neuroscience
  • "The effect of bilingualism on brain development from early childhood to young adulthood" (2020) published in Brain Structure and Function
  • "Deficits of Learning in Procedural Memory and Consolidation in Declarative Memory in Adults With Developmental Language Disorder" (2021) published in Journal of Speech Language and Hearing Research
  • "Early-life education may help bolster declarative memory in old age, especially for women" (2020) published in Aging Neuropsychology and Cognition

They frequently collaborate with several researchers, including João Veríssimo, F. Sayako Earle, Jana Reifegerste, Noreen Goldman, and Maxine Weinstein. The frequency of collaboration varies, with seven publications alongside João Veríssimo and six with F. Sayako Earle.

Ullman's work has been published in a variety of scientific venues, with multiple contributions particularly to Nature Human Behaviour. Other common publication venues include Brain and Language, Frontiers in Psychology, Annual Review of Neuroscience, and Brain Structure and Function.

Best Publications

  • Contributions of memory circuits to language: the declarative/procedural model

    Michael T Ullman

  • Overregularization in Language Acquisition

    Marcus Gf;Pinker S;Ullman M;Hollander M

  • The past and future of the past tense

    Steven Pinker;Michael T. Ullman

  • A neural dissociation within language: Evidence that the mental dictionary is part of declarative memory, and that grammatical rules are processed by the procedural system

    Michael T. Ullman;Suzanne Corkin;Marie Coppola;Gregory Hickok

  • A neurocognitive perspective on language: the declarative/procedural model.

    Michael T. Ullman

  • The neural basis of lexicon and grammar in first and second language: the declarative/procedural model

    Michael T. Ullman

  • Specific language impairment is not specific to language: The procedural deficit hypothesis

    Michael T. Ullman;Elizabeth I. Pierpont

  • The declarative/procedural model of lexicon and grammar.

    Michael T. Ullman

  • Working, declarative and procedural memory in specific language impairment.

    Jarrad A.G. Lum;Gina Conti-Ramsden;Debra Page;Michael T. Ullman

  • Explicit and implicit second language training differentially affect the achievement of native-like brain activation patterns

    Kara Morgan-Short;Karsten Steinhauer;Cristina Sanz;Michael T. Ullman

  • Past tense morphology in specifically language impaired and normally developing children

    Heather K.J. van der Lely;Michael T. Ullman

  • The Declarative/Procedural Model: A Neurobiological Model of Language Learning, Knowledge, and Use

    Michael T. Ullman

  • Neural correlates of lexicon and grammar: evidence from the production, reading, and judgment of inflection in aphasia.

    Michael T. Ullman;Roumyana Pancheva;Roumyana Pancheva;Tracy Love;Eiling Yee;Eiling Yee

  • An Event-Related fMRI Study of Syntactic and Semantic Violations

    Aaron J. Newman;Roumyana Pancheva;Roumyana Pancheva;Kaori Ozawa;Helen J. Neville

  • Second Language Acquisition of Gender Agreement in Explicit and Implicit Training Conditions: An Event-Related Potential Study

    Kara Morgan-Short;Cristina Sanz;Karsten Steinhauer;Michael T. Ullman

  • Is Broca's area part of a basal ganglia thalamocortical circuit?

    Michael T. Ullman

  • A compensatory role for declarative memory in neurodevelopmental disorders.

    Michael T. Ullman;Mariel Y. Pullman

  • Sleep has no critical role in implicit motor sequence learning in young and old adults.

    Dezso Nemeth;Dezso Nemeth;Karolina Janacsek;Zsuzsa Londe;Michael T. Ullman

  • Procedural learning is impaired in dyslexia: evidence from a meta-analysis of serial reaction time studies.

    Jarrad A.G. Lum;Michael T. Ullman;Gina Conti-Ramsden

  • Acceptability Ratings of Regular and Irregular Past-tense Forms: Evidence for a Dual-system Model of Language from Word Frequency and Phonological Neighbourhood Effects

    Michael T. Ullman

  • The Past-Tense Debate The past and future of the past tense

    Steven Pinker;Michael T. Ullman

Frequent Co-Authors

Jarrad A. G. Lum
Jarrad A. G. Lum Deakin University
Karolina Janacsek
Karolina Janacsek Eötvös Loránd University
Dezso Nemeth
Dezso Nemeth Eötvös Loránd University
Steven Pinker
Steven Pinker Harvard University
Stewart H. Mostofsky
Stewart H. Mostofsky Johns Hopkins University School of Medicine
Gina Conti-Ramsden
Gina Conti-Ramsden University of Manchester
James H. Howard
James H. Howard Catholic University of America
Peter E. Turkeltaub
Peter E. Turkeltaub Georgetown University
Rachel Barr
Rachel Barr Georgetown University
Mary Rudner
Mary Rudner Linköping University

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