World's Best Scientists 2026 revealed!

D-Index & Metrics

Psychology

D-Index
42
Citations
6631
World Ranking
7610
National Ranking
756

Stephen Kellett 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 Stephen Kellett 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: 169 publications — 58th percentile

58% of scientists in this discipline score the same or lower.

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

Stephen Kellett 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 Stephen Kellett 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: 42 D-Index — 36th percentile

36% of scientists in this discipline score the same or lower.

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

Overview

Stephen Kellett is affiliated with the University of Sheffield in the United Kingdom. Their research primarily focuses on psychology, with 157 publications in this field. The subfields of study reflect a concentration in clinical psychology, experimental and cognitive psychology, applied psychology, social psychology, and psychiatry and mental health.

Their recent scholarly output includes several papers published in 2020 that address topics related to mental health treatment and accessibility, therapeutic outcomes, and digital mental health technologies. Among these are:

  • "Improving Access to Psychological Therapies (IAPT) in the United Kingdom: A systematic review and meta-analysis of 10-years of practice-based evidence" (2020), published in British Journal of Clinical Psychology
  • "Usability, Acceptability, and Effectiveness of Web-Based Conversational Agents to Facilitate Problem Solving in Older Adults: Controlled Study" (2020), published in Journal of Medical Internet Research
  • "Therapist personality traits as predictors of psychological treatment outcomes" (2020), published in Psychotherapy Research
  • "Predictors of relapse and recurrence following cognitive behavioural therapy for anxiety-related disorders: a systematic review" (2020), published in Cognitive Behaviour Therapy
  • "Dose-response patterns in low and high intensity cognitive behavioral therapy for common mental health problems" (2020), published in Depression and Anxiety

Frequent co-authors collaborating with Stephen Kellett include:

  • Melanie Simmonds-Buckley
  • Jaime Delgadillo
  • C. J. Gaskell
  • Abigail Millings
  • Glenn Waller

Their publications are often found in journals such as:

  • Behavioural and Cognitive Psychotherapy (14 publications)
  • Psychology and Psychotherapy Theory Research and Practice (8 publications)
  • British Journal of Clinical Psychology (7 publications)
  • Psychotherapy Research (3 publications)
  • Journal of Substance Abuse Treatment (3 publications)

The research topics addressed by Stephen Kellett include:

  • Digital Mental Health Interventions
  • Mental Health Research Topics
  • Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
  • Mental Health Treatment and Access
  • Personality Disorders and Psychopathology
  • Psychotherapy Techniques and Applications
  • Child and Adolescent Psychosocial and Emotional Development

Best Publications

  • Evidence of mood linkage in work groups.

    Peter Totterdell;Steve Kellett;Katja Teuchmann;Rob B. Briner

  • The psychological and emotional impact of acne and the effect of treatment with isotretinoin

    S C Kellett;D J Gawkrodger

  • Compulsive buying: A cognitive–behavioural model

    Stephen Kellett;Jessica V. Bolton

  • The dose-response effect in routinely delivered psychological therapies: A systematic review.

    Louisa Robinson;Jaime Delgadillo;Stephen Kellett

  • A systematic review of therapist effects: A critical narrative update and refinement to review.

    Robert G. Johns;Michael Barkham;Stephen Kellett;David Saxon

  • Identifying the Underlying Mechanisms of Change During Acceptance and Commitment Therapy (ACT): A Systematic Review of Contemporary Mediation Studies.

    Daniel Stockton;Stephen Kellett;Raul Berrios;Fuschia Sirois

  • Eliciting mixed emotions: a meta-analysis comparing models, types, and measures.

    Raul Berrios;Raul Berrios;Peter Totterdell;Stephen Kellett

  • Improving Access to Psychological Therapies (IAPT) in the United Kingdom: A systematic review and meta-analysis of 10-years of practice-based evidence.

    Sarah Wakefield;Stephen Kellett;Melanie Simmonds-Buckley;Daniel Stockton

  • Prevalence of Hoarding Disorder: A systematic review and meta-analysis

    Adam Postlethwaite;Stephen Kellett;David Mataix-Cols

  • Efficacy of Cognitive Behavioral Therapy for Generalized Anxiety Disorder in Older Adults: Systematic Review, Meta-Analysis, and Meta-Regression.

    Jo Hall;Stephen Kellett;Raul Berrios;Manreesh Kaur Bains

  • Increasing Attendance for Psychotherapy: Implementation Intentions and the Self-Regulation of Attendance-Related Negative Affect.

    Paschal J. Sheeran;Richard Aubrey;Stephen Kellett

  • Utility of the Brief Symptom Inventory in the Assessment of Psychological Distress

    Stephen Kellett;Nigel Beail;David W. Newman;Pat Frankish

  • Interventions to increase attendance at psychotherapy: a meta-analysis of randomized controlled trials.

    Mary Oldham;Stephen Kellett;Eleanor Miles;Paschal Sheeran

  • The clinical effectiveness of stepped care systems for depression in working age adults: A systematic review

    Nick Firth;Michael Barkham;Stephen Kellett

  • Treatments for compulsive buying: A systematic review of the quality, effectiveness and progression of the outcome evidence

    Ben Hague;Jo Hall;Stephen Kellett

  • Therapist effects and IAPT Psychological Wellbeing Practitioners (PWPs): A multilevel modelling and mixed methods analysis

    Helen Green;Michael Barkham;Stephen Kellett;David Saxon

  • Investigating goal conflict as a source of mixed emotions.

    Raul Berrios;Peter Totterdell;Stephen Kellett

  • Compulsive hoarding: a qualitative investigation of partner and carer perspectives.

    Mark. Wilbram;Stephen. Kellett;Nigel. Beail

  • The factor structure of the Brief Symptom Inventory: intellectual disability evidence

    Stephen Kellett;Nigel Beail;David W. Newman;Annika Hawes

  • The Role of Adult Attachment and Social Support in Hoarding Disorder

    Emma Medard;Stephen Kellett

  • Development and Evaluation of Cognitive Analytic Guided Self-Help (CAT-SH) for Use in IAPT Services.

    Jo Meadows;Stephen Kellett

Frequent Co-Authors

Jaime Delgadillo
Jaime Delgadillo University of Sheffield
Peter Totterdell
Peter Totterdell University of Sheffield
Gillian E. Hardy
Gillian E. Hardy University of Sheffield
Nigel Beail
Nigel Beail University of Sheffield
Michael Barkham
Michael Barkham University of Sheffield
Glenn Waller
Glenn Waller University of Sheffield
Glenys Parry
Glenys Parry University of Sheffield
Paschal Sheeran
Paschal Sheeran University of North Carolina at Chapel Hill
Katherine Berry
Katherine Berry University of Manchester
Dean McMillan
Dean McMillan University of York

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