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Dr. Jan Keller

Jan Keller_studioline_20161221
Image Credit: studioline Photostudios GmbH

Health Psychology

Research Associate

Address
Habelschwerdter Allee 45
Room JK 25/112
14195 Berlin
Email
jan.keller[at]fu-berlin.de

Education and Academic Positions

Since 2018

Post–doctoral research fellow at the Division of Health Psychology (Prof. Nina Knoll) at the Freie Universität Berlin

2017

Research stay and tandem project at University of British Columbia (Vancouver, Canada) with Theresa Pauly, The Health and Adult Development Lab (Supervisor: Prof. Dr. Christiane Hoppmann)

2016

Research stay and tandem project at Columbia University (New York City, USA) with Dr. Corina Berli, Couples Lab (Supervisor: Prof. Dr. Niall Bolger)

Since 2015

SUPPORT: Qualification programme for university didactics, Freie Universität Berlin

2013 - 2018

PhD-Student and research associate at the Division of Health Psychology (Prof. Nina Knoll) at the Freie Universität Berlin; projects: "Days in motion" and "PrevOP"

Februar 2013

Master of Science in Psychology at the Freie Universität Berlin

2010 - 2013

Student research assistant at the Division of Health Psychology at the Freie Universität Berlin

2007 - 2010

Bachelor of Science in Psychology at the Freie Universität Berlin

2007

A-levels in Frankfurt (Oder), Germany

 Awards / Grants

2019

Herman Schaalma Dissertation Award of the European Health Psychology Society

2018

Graduate Student Achievement Award of the International Association of Applied Psychology (IAAP; Division 8)

2017

Conference grant funded by the German Academic Exchange Service (Italy)

2017

Quinn Exchange Fellowship of the Department of Psychology (University of British Columbia, Vancouver, Canada) for a tandem exchange with The Health and Adult Development Lab

2016

CREATE Tandem Grant of the European Health Psychology Society

2015

Conference grant funded by the German Academic Exchange Service (Cyprus)

Activities in scientific communities:

Since 2020

Consulting Editorial Board: Applied Psychology: Health and Well-being

2018 - 2019

Member of the Scientific Committee for the 33rd Conference of the European Health Psychology Society (EHPS) in 2019

Since 2016

Treasurer of the SYNERGY Executive Committee of the EHPS

2015 - 2017

Member of the EHPS e-courses Committee

2013 - 2016

Treasurer of the CREATE Executive Committee of the EHPS

Ad hoc Reviewer

  • Anxiety, Stress & Coping; Appetite; Applied Psychology: Health and Well-Being; BMJ Open; British Journal of Health Psychology; European Journal of Health Psychology; European Journal of Psychological Assessment; Gerontology; Health Psychology and Behavioral Medicine: an Open Access Journal; Health Psychology Review; International Journal of Behavioral Medicine; Jornal de Pediatria; Journal of Occupational and Environmental Medicine; Journal of Science and Medicine in Sport; Journal of Social and Personal Relationships; Journal of Sport and Health Science; PLOS ONE; Psychology, Community & Health; Psychology of Sport and Exercise; Psychology & Health; Social Science & Medicine

Member in the following scientific communities:

  • International Association of Applied Psychology (IAAP)
  • European Health Psychology Society (EHPS)
  • SYNERGY (Subdivision of the EHPS)
  • Collaborative Research and Training in the EHPS (CREATE; Subdivision of the EHPS)
  • Deutsche Gesellschaft für Psychologie (DGPs)
WT 2020/21 "Research Workshop: Health Psychology" (Master Psychology), Freie Universität Berlin
WT 2020/21 Seminar "Digital technologies in health psychology: Opportunities and limitations" (Bachelor Psychology), Freie Universität Berlin
ST 2020 2x Seminar "Health Psychology: Interventions for behaviour change" (Bachelor Psychology), Freie Universität Berlin
WT 2019/20 Lecture "Health Psychology in context" (Master Psychology), Freie Universität Berlin
WT 2019/20 Seminar "Digital technologies in health psychology: Opportunities and limitations" (Bachelor Psychology), Freie Universität Berlin
ST 2019 Seminar "Development of online-based health psychology interventions" (Master Psychology), Freie Universität Berlin
ST 2019 Seminar "Health Psychology: Interventions for behaviour change" (Bachelor Psychology), Freie Universität Berlin
WT 2018/19 "Research Workshop: Health Psychology" (Master Psychology), Freie Universität Berlin
WT 2018/19 Seminar "Technology-based methods to assess health measures" (Bachelor Psychology), Freie Universität Berlin
ST 2018 2x Seminar "Health Psychology: Interventions for behaviour change" (Bachelor Psychology), Freie Universität Berlin
WT 2017/18 "Research Workshop: Health Psychology" (Master Psychology), Freie Universität Berlin
WT 2017/18

Seminar "Technology-based methods to assess health measures" (Bachelor Psychology), Freie Universität Berlin

ST 2017

Seminar "Health Psychology: Interventions for behaviour change" (Bachelor Psychology), Freie Universität Berlin

WT 2016/17

"Research Workshop: Health Psychology" (Master Psychology), Freie Universität Berlin

WT 2016/17

Seminar "Occupational Health Psychology: What contributes to a healthy company?" (Bachelor Psychology), Freie Universität Berlin

WT 2016/17

Lectureship for the session "Health Psychology" (Master Gesundheitswissenschaften), Berlin School of Public Health

ST 2016

Seminar "Health Psychology" (Bachelor Psychology), Freie Universität Berlin

WT 2015/16

Seminar "Development of online-based health psychology interventions" (Master Psychology), Freie Universität Berlin

ST 2015

Seminar "Health Psychology" (Bachelor Psychology), Freie Universität Berlin

Research Projects

ERNA (2020)

An intensive longitudinal study on habit formation of hand washing behavior (www.drks.de/DRKS00022067)

Hand washing during COVID-19 pandemic (2020)

A longitudinal study on health behavior change during the COVID-19 pandemic: Hand washing (https://clinicaltrials.gov/ct2/show/NCT04367337)

Contenance (2019)

A randomized controlled trial to evaluate the efficacy of a mobile intervention on healthy smartphone use (www.drks.de/DRKS00017606)
HABIT (2019) A randomized controlled trial to evaluate the efficacy of time- and routine-based cues on habit formation (www.drks.de/DRKS00016720)
Gesprächsstudie (2018-2019) Examining age-related changes of empathic accuracy using an experimental paradigm
Happy5 (2016) A randomized controlled trial to evaluate effects of a planning and self-efficacy intervention to augment fruit and vegetable consumption

PrevOP (2016-2017)

Preventing the impairment of primary Osteoarthritis by high impact long-term Physical exercise regimen (www.drks.de/DRKS00009677)

DiM (2013 - 2016)

"Days in Motion": A planning intervention study with couples to enhance daily physical activity (www.clinicaltrials.gov/ct2/show/NCT01963494)

Research interests:

  • Social exchange processes and health promotion (e.g. dyadic planning)
  • Self-regulatory strategies and health behavior change
    • Action Planning, Action Control, Self-efficacy
  • Processes of habit formation
  • Coping of illnesses and associated consequences

Journal articles (peer-reviewed)

Di Maio, S., Keller, J., Hohl, D. H., Schwarzer, R., & Knoll, N. (in press). Habits and self-efficacy moderate the effects of intentions and planning on physical activity. British Journal of Health Psychology. doi: https://doi.org/10.1111/bjhp.12452

Di Maio, S., Keller, J., Job, V., Felsenberg, D., Ertel, W., Schwarzer, R., & Knoll, N. (in press). Health demands moderate the link between willpower beliefs and physical activity in patients with knee osteoarthritis. International Journal of Behavioral Medicine. https://doi.org/10.1007/s12529-020-09865-w

Boberska, M., Zarychta, K., Knoll, N., Keller, J., Hohl, D. H., Horodyska, K., Kruk, M., & Luszczynska, A. (in press). Maternal practices and perceptions of child body mass status explain child energy expenditure behaviors and body mass. Journal of Behavioral Medicine. https://doi.org/10.1007/s10865-020-00138-1

Domke, A., Keller, J., Fleig, L., Knoll, N., & Schwarzer, R. (in press). What makes a good action plan? Characteristics and enactment of fruit and vegetable plans. Appetite. https://doi.org/10.1016/j.appet.2019.104351

Keller, J., Hohl, D.H., Hosoya, G., Heuse, S., Scholz, U., Luszczynska, A., & Knoll, N. (2020). Long-term effects of a dyadic planning intervention with couples motivated to increase physical activity. Psychology of Sport & Exercise, 49, e101710. https://doi.org/10.1016/j.psychsport.2020.101710

Knoll, N., Keller, J., Luszczynska, A., Scholz, U., Röcke, C., Schrader, M., & Heckhausen, J. (2020). Control strategies and daily affect: Couples adapt to new functional limitations. GeroPsych, 33, 155-169. https://doi.org/10.1024/1662-9647/a000229

Pauly, T.*, Keller, J.*, Knoll, N., Michalowski, V. I., Hohl, D. H., Ashe, M. C., Gerstorf, D., Madden, K. M.,. Hoppmann, C. A. (2020). Moving in sync: Hourly physical activity and sedentary behavior are synchronized in couples. Annals of Behavioral Medicine, 54(1), 10-21. https://doi.org/10.1093/abm/kaz019

* Shared first authorship

Czekierda, K., Zarychta, K., Knoll, N., Keller, J., & Luszczynska, A. (2019). Links between meaning in life and physical quality of life after rehabilitation: Mediating effects of positive experiences with physical exercises and mobility. PLoS ONE, 14(10), e0224503. https://doi.org/10.1371/journal.pone.0224503

Stanczykiewicz, B., Banik, A., Knoll, N., Keller, J., Hohl, D.H., Rosinczuk, J., Luszczynska, A. (2019). Sedentary behaviors and anxiety among children, adolescents, and adults.: A systematic review and meta-analysis. BMC Public Health, 19, 459. https://doi.org/10.1186/s12889-019-6715-3

Hohl, D. H., Schultze, M., Keller, J., Heuse, S., Luszczynska, A., & Knoll, N. (2019). Inter-relations between partner provided support and self-efficacy: A dyadic longitudinal analysis. Applied Psychology: Health and Well-Being, 11(3), 522-542. https://doi.org/10.1111/aphw.12166

Fleig, L., Ashe, M. C., Keller, J., Lippke, S., & Schwarzer, R. (2019). Putting psychology into telerehabilitation: Coping planning as an example for how to integrate behavior change techniques into clinical practice. AIMS Medical Science, 6(1), 13-32. https://doi.org/10.3934/medsci.2019.1.13

Boberska, M., Horodyska, K., Kruk, M., Knoll, N., Hohl, D. H., Keller, J., & Luszczynska, A. (2019). Parental strategies restricting screen use among children, screen home environment, and child screen use as predictors of child body fat: A prospective parent–child study. British Journal of Health Psychology, 24(2), 298-314. https://doi.org/10.1111/bjhp.12354

Knoll, N., Hohl, D. H., Motter, S., Keller, J., Lange, D., Felsenberg, D., Martus, P., Ertel, W., & Schwarzer, R. (2018). Facilitating physical activity and reducing symptoms in patients with knee osteoarthritis: Study protocol of a randomized controlled trial to test a theory-based PrevOP-Psychological Adherence Program (PrevOP-PAP). BMC Musculoskeletal Disorders, 19(1), 221. https://doi.org/10.1186/s12891-018-2158-8

Hohl, D. H., Lüscher, J., Keller, J., Heuse, S., Scholz, U., Luszczynska, A., & Knoll, N. (2018). Inter-relations among negative social control, self-efficacy, and physical activity in healthy couples. British Journal of Health Psychology, 23(3), 580-596. https://doi.org/10.1111/bjhp.12305

Keller, J., Motter, S., Motter, M., & Schwarzer, R. (2018). Augmenting fruit and vegetable consumption by an online intervention: Psychological mechanisms. Appetite, 120, 348-355. https://doi.org/10.1016/j.appet.2017.09.019

Boberska, M., Szczuka, Z., Kruk, M., Knoll, N., Keller, J., Hohl, D. H., & Luszczynska, A. (2018). Sedentary behaviors and health-related quality of life. A systematic review and meta-analysis. Health Psychology Review, 12, 195-210. https://doi.org/10.1080/17437199.2017.1396191

Keller, J., Fleig, L., Hohl, D. H., Wiedemann, A. U., Burkert, S., Luszczynska, A., & Knoll, N. (2017). Which characteristics of planning matter? Individual and dyadic physical activity plans and their effects on plan enactment. Social Science and Medicine, 189, 53-62. https://doi.org/10.1016/j.socscimed.2017.07.025

Fleig, L., Gardner, B., Keller, J., Lippke, S., Pomp, S., & Wiedemann, A. U. (2017). What contributes to action plan enactment? Examining characteristics of physical activity plans. British Journal of Health Psychology, 22(4), 940-957. https://doi.org/10.1111/bjhp.12263

Keller, J., Wiedemann, A. U., Hohl, D. H., Scholz, U. Burkert, S., Schrader, M., & Knoll, N. (2017). Predictors of dyadic planning: Perspectives of prostate cancer survivors and their partners. British Journal of Health Psychology, 22(1), 42-59. https://doi.org/10.1111/bjhp.12216

Knoll, N., Hohl, D. H., Keller, J., Schuez, N., Luszczynska, A., & Burkert, S. (2017). Effects of dyadic planning on physical activity in couples: A randomized controlled trial. Health Psychology, 36, 8-20https://doi.org/10.1037/hea0000423

Keller, J., Gellert, P., Knoll, N., Schneider, M., & Ernsting, A. (2016). Self-efficacy and planning as predictors of physical activity in the context of workplace health promotion. Applied Psychology: Health and Well-Being, 8(3), 301-321. https://doi.org/10.1111/aphw.12073

Hohl, D., Knoll, N., Wiedemann, A., Keller, J., Scholz, U., Schrader, M., & Burkert, S. (2015). Enabling or cultivating? The role of prostate cancer patients’ received partner support and self-efficacy in the maintenance of pelvic floor exercise following tumor surgery. Annals of Behavioral Medicine, 1-12. https://doi.org/10.1007/s12160-015-9748-6

Keller, J., Burkert, S., Wiedemann, A. U., Luszczynska, A., Schrader, M., & Knoll, N. (2015). Individual and dyadic planning predicting pelvic floor exercise among prostate cancer survivors. Rehabilitation Psychology, 60(3), 222-231. https://doi.org/10.1037/rep0000047

Miscellanea

Berli, C., Keller, J. (2016). Dyadic health behaviour change: A Tandem project on couples' co-regulation of physical activity. European Health Psychologist, 18(5), 212-125.

Presentations

2019

Keller, J., Hohl, D. H., Pauly, T., Hoppmann, C., & Knoll, N. (2019). Synchrony of physical activity in couples following a dyadic planning intervention. Oral presentation at the 14. Kongress der Fachgruppe Gesundheitspsychologie, 25-27 September 2019 in Greifswald, Germany.

Keller, J., Hohl, D. H., Pauly, T., Hoppmann, C., & Knoll, N. (2019). Synchrony of physical activity in couples following a dyadic planning interventionOral presentation at the 33rd Conference of the European Health Psychology Society, 03-07 September 2019 in Dubrovnik, Croatia.

2018

Keller, J., Pauly, T., Hohl, D. H., Knoll, N., & Hoppmann, C. (2018). Synchrony of physical activity and sedentary behaviour in couples. Oral presentation at the 51. Kongress der Deutschen Gesellschaft für Psychologie, 15-20 September 2018 in Frankfurt (Main), Germany.

Keller, J., Pauly, T., Hohl, D. H., Knoll, N., & Hoppmann, C. (2018). Synchrony of physical activity and sedentary behaviour in couples. Oral presentation at the 32nd Conference of the European Health Psychology Society, 21-25 August 2018 in Galway, Ireland.

Keller, J., Pauly, T., Hohl, D. H., Knoll, N., & Hoppmann, C. (2018). Synchrony of physical activity and sedentary behaviour in couples. Oral presentation at the 29th International Congress of Applied Psychology, 26-30 June 2018 in Montreal, Canada.

2017

Keller, J., Motter, S., Motter, M., & Schwarzer, R. (2017). Augmenting Fruit and Vegetable Consumption by an Online Intervention: Psychological Mechanisms. Oral presentation at the 31st Conference of the European Health Psychology Society, 29th August - 02nd September 2017 in Padua, Italy.

Keller, J., Hohl, D.H., Burkert, S., Hosoya, G., Scholz, U. &  Knoll, N. (2017). One-year follow-up effects of a dyadic planning intervention to increase physical activity: A randomized controlled trial with healthy couples. Oral presentation at the 13. Kongress der Fachgruppe Gesundheitspsychologie, 22-25 August 2017 in Siegen, Germany.

Keller, J., Pauly, T., Hohl, D. H., Knoll, N., & Hoppmann, C. (2017). Physical Activity Synchrony in Couples’ Accelerometer Data. Poster presentation at the 5th Conference of the Society of Ambulatory Assessment, 15-17 June 2017 in Esch an der Alzette, Luxembourg.

2016

Keller, J., Hohl, D. H., Knoll, N., Fleig, L., Wiedemann, A., & Burkert, S. (2016). Umsetzung von Handlungsplänen zur körperlichen Aktivität: Individuelle Pläne vs. dyadische Pläne. Oral Presentation at the 50. Kongress der Deutschen Gesellschaft für Psychologie, 18-22 September 2016 in Leipzig, Germany.

Keller, J., Hohl, D. H., Knoll, N., Fleig, L., Wiedemann, A., & Burkert, S. (2016). Plan Enactment of physical activities: Individual planning vs. Dyadic planning. Oral Presentation at the 30th Conference of the European Health Psychology Society, 23-27 August 2016 in Aberdeen, UK.

2015

Keller, J., Knoll, N., Wiedemann, A., Hohl, D.H., Schrader, M., & Burkert, S. (2015). Gemeinsam schaffen wir das: Dyadisches Planen von Beckenbodentraining für Männer. Oral Presentation at the 12. Kongress der Fachgruppe Gesundheitspsychologie, 17-19 September 2015 in Graz, Austria.

Keller, J., Wiedemann, A. U., Burkert, S., Hohl, D. H., Schrader, M., & Knoll, N. (2015). Predictors of dyadic planning of pelvic floor exercise: Perspectives of prostate cancer survivors and partners. Oral Presentation at the 29th Conference of the European Health Psychology Society, 02-05 September 2015 in Limassol, Cyprus.

2014

Keller, J., Wiedemann, A. U., Burkert, S., & Knoll, N. (2014). Sequentieller Einsatz individueller und dyadischer Planungsstrategien zur Steigerung des Beckenbodentrainings bei Patienten nach radikaler Prostatektomie. Oral Presentation at the 49th Kongress der Deutschen Gesellschaft für Psychologie, 21-25 September 2012 in Bochum, Germany.

Keller, J., Knoll, N., Wiedemann, A. U., & Burkert, S. (2014). Individual and dyadic planning as correlates of pelvic-floor training: A study with prostate cancer patients. Oral Presentation at the 28th Conference of the European Health Psychology Society, 26-30 August 2014 in Innsbruck, Austria.

2013

Keller, J., Gellert, P., Knoll, N., Schneider, M. & Ernsting, A. (2013). A brief workplace health promotion program for physical activity: Self-efficacy and planning as longitudinal predictors. Oral Presentation at Health Psychology Workshop,16 October 2013 at Newcastle University, UK.

Keller, J., Gellert, P., Knoll, N., Schneider, M., & Ernsting, A. (2013). A brief workplace health promotion program for physical activity: Self-efficacy and planning as longitudinal predictors. Oral Presentation at the 27th Conference of the European Health Psychology Society,16-20 July 2013 in Bordeaux, France.

2012

Keller, J., Gellert, P., Ernsting, A., & Schneider, M. (2012). Körperlich aktiver werden trotz höheren Alters?. Poster Presentation at the 48th Kongress der Deutschen Gesellschaft für Psychologie, 23-27 September 2012 in Bielefeld, Germany.

Disease in Human Aging: Dynamics at the Level of Molecules, Individuals, and Society