World's Best Scientists 2026 revealed!

D-Index & Metrics

Psychology

D-Index
33
Citations
4642
World Ranking
10549
National Ranking
5537

Lydia M. Hopper 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 Lydia M. Hopper sits on this spectrum.

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 publications 705+

This scientist: 94 publications — 16th percentile

16% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 705 publications or more.

Lydia M. Hopper 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 Lydia M. Hopper sits on this spectrum.

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 D-Index 144+

This scientist: 33 D-Index — 10th percentile

10% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 144 D-Index or more.

Overview

Lydia M. Hopper is affiliated with Johns Hopkins University School of Medicine in the United States. Their research primarily spans the fields of psychology and neuroscience, with an emphasis on social psychology, small animals, genetics, cognitive neuroscience, and sensory systems.

Their research topics cover:

  • Primate Behavior and Ecology
  • Animal Behavior and Welfare Studies
  • Human-Animal Interaction Studies
  • Olfactory and Sensory Function Studies
  • Animal Behavior and Reproduction
  • Evolutionary Game Theory and Cooperation
  • Memory and Neural Mechanisms

Frequent publication venues for their work include:

  • American Journal of Primatology
  • Animal Behavior and Cognition
  • Animals
  • International Journal of Primatology
  • Applied Animal Behaviour Science

Recent papers authored or co-authored by Lydia M. Hopper include:

  • The zone of latent solutions and its relevance to understanding ape cultures, 2020, Biology & Philosophy
  • The application of noninvasive, restraint-free eye-tracking methods for use with nonhuman primates, 2020, Behavior Research Methods
  • A Comparative Perspective on Three Primate Species' Responses to a Pictorial Emotional Stroop Task, 2021, Animals
  • Using a Touchscreen Paradigm to Evaluate Food Preferences and Response to Novel Photographic Stimuli of Food in Three Primate Species (Gorilla gorilla gorilla, Pan troglodytes, and Macaca fuscata), 2020, International Journal of Primatology
  • Food Cleaning by Japanese Macaques: Innate, Innovative or Cultural?, 2020, Folia Primatologica

They have collaborated frequently with several co-authors, including:

  • Stephen R. Ross
  • Jesse G. Leinwand
  • Sarah M. Huskisson
  • Crystal L. Egelkamp
  • Amy Fultz

Best Publications

  • Emulation, imitation, over-imitation and the scope of culture for child and chimpanzee.

    Andrew Whiten;Nicola McGuigan;Sarah Marshall-Pescini;Sarah Marshall-Pescini;Lydia M. Hopper;Lydia M. Hopper

  • Chimpanzees copy dominant and knowledgeable individuals: implications for cultural diversity

    Rachel Kendal;Lydia M. Hopper;Andrew Whiten;Sarah F. Brosnan;Sarah F. Brosnan

  • Experimental studies of traditions and underlying transmission processes in chimpanzees

    Lydia M. Hopper;Antoine Spiteri;Susan P. Lambeth;Steven J. Schapiro

  • Observational learning in chimpanzees and children studied through 'ghost' conditions.

    Lydia M Hopper;Susan P Lambeth;Steven J Schapiro;Andrew Whiten

  • Social networks in primates: smart and tolerant species have more efficient networks

    Cristian Pasquaretta;Cristian Pasquaretta;Marine Levé;Marine Levé;Marine Levé;Nicolas Claidière;Erica van de Waal

  • Chimpanzees' socially maintained food preferences indicate both conservatism and conformity.

    Lydia M. Hopper;Steven J. Schapiro;Susan P. Lambeth;Sarah F. Brosnan

  • Establishing an infrastructure for collaboration in primate cognition research.

    Many Primates;Drew M. Altschul;Michael J. Beran;Manuel Bohn;Manuel Bohn

  • Developing a comprehensive and comparative questionnaire for measuring personality in chimpanzees using a simultaneous top‐down/bottom‐up design

    Hani D. Freeman;Hani D. Freeman;Sarah F. Brosnan;Sarah F. Brosnan;Lydia M. Hopper;Lydia M. Hopper;Susan P. Lambeth

  • 'Ghost' experiments and the dissection of social learning in humans and animals.

    Lydia M. Hopper

  • The zone of latent solutions and its relevance to understanding ape cultures

    Claudio Tennie;Elisa Bandini;Carel P. van Schaik;Lydia M. Hopper

  • Selective and contagious prosocial resource donation in capuchin monkeys, chimpanzees and humans

    Nicolas Claidière;Andrew Whiten;Mary C. Mareno;Emily J. E. Messer

  • Observational learning of tool use in children: Investigating cultural spread through diffusion chains and learning mechanisms through ghost displays

    Lydia M. Hopper;Emma G. Flynn;Lara A.N. Wood;Andrew Whiten

  • End state copying by humans (Homo sapiens): implications for a comparative perspective on cumulative culture.

    Christine A. Caldwell;Kerstin Schillinger;Cara L. Evans;Lydia M. Hopper

  • Personality influences responses to inequity and contrast in chimpanzees

    Sarah F. Brosnan;Lydia M. Hopper;Sean Richey;Hani D. Freeman

  • Psychological limits on animal innovation

    Sarah F. Brosnan;Lydia M. Hopper

  • Influence of personality, age, sex, and estrous state on chimpanzee problem-solving success

    Lydia M. Hopper;Lydia M. Hopper;Sara A. Price;Sara A. Price;Sara A. Price;Hani D. Freeman;Hani D. Freeman;Susan P. Lambeth

  • Cognitive research in zoos

    Lydia M Hopper

  • Studying primate cognition in a social setting to improve validity and welfare: a literature review highlighting successful approaches.

    Katherine A. Cronin;Sarah L. Jacobson;Kristin E. Bonnie;Kristin E. Bonnie;Lydia M. Hopper

  • The importance of witnessed agency in chimpanzee social learning of tool use.

    Lydia M. Hopper;Susan P. Lambeth;Steven J. Schapiro;Andrew Whiten

  • Social comparison mediates chimpanzees’ responses to loss, not frustration

    Lydia M. Hopper;Lydia M. Hopper;Lydia M. Hopper;Susan P. Lambeth;Steven J. Schapiro;Steven J. Schapiro;Sarah F. Brosnan;Sarah F. Brosnan

  • Social networks in primates: smart and tolerant species have more efficient

    Andrew J. J. MacIntosh;Marie Pele;Mackenzie L. Bergstrom;Sarah F. Brosnan

Frequent Co-Authors

Stephen R. Ross
Stephen R. Ross Lincoln Park Zoo
Steven J. Schapiro
Steven J. Schapiro The University of Texas MD Anderson Cancer Center
Sarah F. Brosnan
Sarah F. Brosnan Georgia State University
Andrew Whiten
Andrew Whiten University of St Andrews
Odile Petit
Odile Petit Centre national de la recherche scientifique, CNRS
Claudia Fichtel
Claudia Fichtel German Primate Center
Bernard Thierry
Bernard Thierry Centre national de la recherche scientifique, CNRS
Samuel D. Gosling
Samuel D. Gosling The University of Texas at Austin
Cédric Sueur
Cédric Sueur University of Strasbourg
Michael J. Beran
Michael J. Beran Georgia State University

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