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Psychology
UK
2026

D-Index & Metrics

Psychology

D-Index
104
Citations
38666
World Ranking
525
National Ranking
72

Daniel Freeman 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 Daniel Freeman 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: 450 publications — 96th percentile

96% of scientists in this discipline score the same or lower.

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

Daniel Freeman 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 Daniel Freeman 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: 104 D-Index — 96th percentile

96% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2026 - Research.com Psychology in United Kingdom Leader Award

Overview

Daniel Freeman is affiliated with the University of Oxford in the United Kingdom and has contributed extensively to the fields of psychology and medicine. They have a particular focus on psychiatry and mental health, experimental and cognitive psychology, and clinical psychology. Their research also spans philosophy and cognitive neuroscience.

Their work covers various topics including schizophrenia research and treatment, psychosomatic disorders and their treatments, mental health research, mental health and psychiatry, anxiety, depression, psychometrics, treatment, cognitive processes, vaccine coverage and hesitancy, as well as mental health treatment and access.

Freeman's frequent co-authors include Felicity Waite, Bao Sheng Loe, Sinéad Lambe, Laina Rosebrock, and Thomas Kabir, reflecting ongoing collaboration within their research community.

Their publications have appeared predominantly in journals such as Psychological Medicine, PsycTESTS Dataset, Behavioural and Cognitive Psychotherapy, The Lancet Psychiatry, and Scientific Reports.

  • COVID-19 vaccine hesitancy in the UK: the Oxford coronavirus explanations, attitudes, and narratives survey (Oceans) II, 2020, Psychological Medicine
  • Sleep disturbance and psychiatric disorders, 2020, The Lancet Psychiatry
  • Effects of different types of written vaccination information on COVID-19 vaccine hesitancy in the UK (OCEANS-III): a single-blind, parallel-group, randomised controlled trial, 2021, The Lancet Public Health
  • Injection fears and COVID-19 vaccine hesitancy, 2021, Psychological Medicine

Freeman's contributions predominantly address mental health issues, bridging clinical approaches and public health concerns, particularly visible in their work related to vaccine hesitancy and psychiatric disorders.

Best Publications

  • A cognitive model of the positive symptoms of psychosis.

    PA Garety;E Kuipers;DG Fowler;D Freeman

  • Virtual reality in the assessment, understanding, and treatment of mental health disorders.

    D Freeman;S Reeve;A Robinson;A Ehlers

  • Cognitive approaches to delusions: a critical review of theories and evidence.

    Philippa A. Garety;Daniel Freeman

  • A cognitive model of persecutory delusions

    Daniel Freeman;Philippa A. Garety;Elizabeth Kuipers;David Fowler

  • Suspicious minds: The psychology of persecutory delusions

    Daniel Freeman

  • Psychological investigation of the structure of paranoia in a non-clinical population.

    Daniel Freeman;Philippa A. Garety;Paul E. Bebbington;Benjamin Smith

  • COVID-19 Vaccine Hesitancy in the UK: The Oxford Coronavirus Explanations, Attitudes, and Narratives Survey (OCEANS) II.

    Daniel Freeman;Daniel Freeman;Bao S. Loe;Andrew Chadwick;Cristian Vaccari

  • Sleep disturbance and psychiatric disorders.

    Daniel Freeman;Daniel Freeman;Bryony Sheaves;Bryony Sheaves;Felicity Waite;Felicity Waite;Allison G Harvey

  • The effects of improving sleep on mental health (OASIS): a randomised controlled trial with mediation analysis

    Daniel Freeman;Daniel Freeman;Bryony Sheaves;Bryony Sheaves;Guy M Goodwin;Guy M Goodwin;Ly-Mee Yu

  • Connecting neurosis and psychosis: the direct influence of emotion on delusions and hallucinations.

    Daniel Freeman;Philippa A. Garety;Philippa A. Garety

  • The Brief Core Schema Scales (BCSS): psychometric properties and associations with paranoia and grandiosity in non-clinical and psychosis samples

    David Fowler;Daniel Freeman;Ben Smith;Elizabeth Kuipers

  • London-East Anglia randomised controlled trial of cognitive-behavioural therapy for psychosis. I: effects of the treatment phase.

    Elizabeth Kuipers;Philippa Garety;David Fowler;Graham Dunn

  • Reasoning, emotions, and delusional conviction in psychosis.

    Philippa A. Garety;Daniel Freeman;Suzanne Jolley;Graham Dunn

  • Lack of Social Participation or Religious Strength and Comfort as Risk Factors for Death After Cardiac Surgery in the Elderly

    Unknown

  • Social support and depressive symptoms in the elderly.

    Thomas E. Oxman;Lisa F. Berkman;Stanislav Kasl;Daniel H. Freeman

  • Emotion and psychosis: Links between depression, self-esteem, negative schematic beliefs and delusions and hallucinations

    Ben Smith;David G. Fowler;Daniel Freeman;Paul Bebbington

  • Coronavirus conspiracy beliefs, mistrust, and compliance with government guidelines in England.

    Daniel Freeman;Daniel Freeman;Felicity Waite;Felicity Waite;Laina Rosebrock;Laina Rosebrock;Ariane Petit;Ariane Petit

  • Measuring ideas of persecution and social reference: the Green et al. Paranoid Thought Scales (GPTS)

    Cel Green;D Freeman;E Kuipers;PE Bebbington

  • Effect of digital cognitive behavioral therapy for insomnia on health, psychological well-being, and sleep-related quality of life: a randomized clinical trial

    Colin A. Espie;Richard Emsley;Simon D. Kyle;Christopher Gordon

  • Persecutory delusions: developing the understanding of belief maintenance and emotional distress.

    Daniel Freeman;Philippa Garety;Elizabeth Kuipers

  • Implications for neurobiological research of cognitive models of psychosis: a theoretical paper.

    Philippa A. Garety;Paul Bebbington;David Fowler;Daniel Freeman

  • Advances in understanding and treating persecutory delusions: a review

    Daniel Freeman;Philippa Garety

  • Comments on the content of persecutory delusions: Does the definition need clarification?

    Daniel Freeman;Philippa A. Garety

  • The past and future of delusions research: from the inexplicable to the treatable.

    Philippa Garety;Daniel Freeman

Frequent Co-Authors

Philippa Garety
Philippa Garety King's College London
Graham Dunn
Graham Dunn University of Manchester
Elizabeth Kuipers
Elizabeth Kuipers King's College London
Paul Bebbington
Paul Bebbington University College London
David Fowler
David Fowler University of Sussex
Helen Startup
Helen Startup Sussex Partnership NHS Foundation Trust
Mel Slater
Mel Slater University of Barcelona
Richard Emsley
Richard Emsley King's College London
Angelica Ronald
Angelica Ronald Birkbeck, University of London
Matthew R. Broome
Matthew R. Broome University of Birmingham

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