October 22nd, 2022: Our essay on how social constructions may influence policy decision making (Mensbeelden bij Beleid) was published on the Netherlands Institute for Social Research (Sociaal en Cultureel Planbureau) website. It is well received on the social media!

September 29th, 2022: The paper by Eline Meijer, that I co-authored, entitled Indentified or conflicted: A latent class and regression tree analysis explaining how identity constructs cluster within smokers, was accepted for publication in BMJ Psychology.

July 1st, 2022: Two publications by two of my talented PhD students were accepted for publication:

  1. Penfornis, K.M., van Vliet, M. H.M., Meijer, E. & Gebhardt, W.A. (accepted for publication). Mapping the Evidence on Identity Processes and Identity-Related Interventions in the Smoking and Physical Activity Domains: A Scoping Review Protocol. British Medical Journal Open.
  2. Brust, M., Gebhardt, W. A., van der Voorde, N. A., Numans, M. E., & Kiefte-de Jong, J. C. (2022). The development and validation of scales to measure the presence of a teachable moment following a cardiovascular disease event. Preventive Medicine Reports, 101876.

December 21st, 2021: Happy to announce that our paper “Like to drink: Dynamics of linking alcohol posts and effects on alcohol use” has been accepted in Computers in Human Behavior. Our colleague Sebastian Kurten at the Katholic University of Leuven was the first author.

December 13th, 2021: The newsletter of the Academic Workplace Preventive Health Northern South Holland commemorates my work for the Workplace. Proud to have been an active member of this valuable network for all people working on preventive health in the region. 

November 18th, 2021: My new colleague Peteke Feijten en I were presenters of a session on the influence of policy makers’ views on citizens at the “Dag van het Gedrag” (Day of Behavior) of the Netherlandds Behavioral Insights Network.  

 September 30th, 2021: Over the summer months, three articles, that I co-authored have been published.

  1. Hendriks H, De Nooy W, Gebhardt W, Van den Putte B (accepted). Is seeing doing? The causal effects of alcohol-related Facebook posts on drinking behavior. Journal of Medical Internet Research. 28/09/2021:28237 (forthcoming/in press). 
  2. Brust, M., Gebhardt, W. A., Numans, M. E., & Kiefte-de Jong, J. C. (2021). The COVID-19 crisis as a teachable moment for lifestyle change in Dutch cardiovascular disease patients. Frontiers in Psychology, 12.
  3. Nieuwstraten, J.A., van Doorn, L.P., Gebhardt, W.A., & Hamming, J.F. (2021). Stakeholder values and preferences in lower limb amputation for no-option chronic limb threatening ischemia, Patient Preference and Adherence, 15, 1051-1059.

July 21th, 2021: An article in the Leidsch Dagblad reports on an interview with me on the importance of taking rest and a break from work. 

As of April 1st, 2021 I have joined the research team of the Sociaal en Cultureel Planbureau, i.e., the Netherlands Institute for Social Research! As a senior researcher I will take part in the program on Policy Views, Citizen Views, and Behavior.

March 4th, 2021: All blogs, including mine on self-identity processes, that were written for Practical Health Psychology have been published in an ebook accessible for all interested in implementing behavioral insights in practice. Here you can find the link to the ebook.

January 2nd, 2021: For those who have good intentions: you may wish to read a column by Ben Tiggelaar (in Dutch) on tips for doing so more effectively. In it quite some attention for our research on identity processes

December 14th, 2020: I was interviewed on the uptake of the Covid19 vaccine for Radio Omroep West. If you would like to listen to the 5 minute interview (in Dutch): (minutes: 24.33 – 29.42).

A longer version of the story (again in Dutch) was placed on their website:

Eline Meijer and I are the guest editors of a special issue of the International Journal of Environmental Research and Public Health. The theme of the issue is “interventions to enhance an active lifestyle in high-risk populations”. Submissions are welcomed until September 30th, 2021. SI – Flyer

December 17th, 2020, I will be giving a lecture on health behavior change for staff members of the Nederlandse Zorgauthoriteit.

November 21th, 2020, I will be giving a online seminar for the “Vlaamse Vereniging voor Respiratoire Gezondheidszorg en Tuberculosebestrijding” on identity processes during the process of quitting smoking.

October 26th, 2020: The Healthy University Week has started! On Thursday and Friday 24! online interactive webinars will be presented by our Master’s students from the course Health Promotion and Disease Prevention on sleep, worrying, snacking, taking breaks, loneliness, and alcohol use during Corona times.

October 1st, 2020: EenVandaag interviewed me for an item on the new law that requires the plain packaging of cigarettes. In it, the link between packaging and identity of the smoker is discussed. It was broadcasted on national television, see (in Dutch):

winnie at EenVandaag

September 1st, 2020: Marjon Bohré started as a dual PhD candidate to work on her reseach project concerning the influence of leadership on experienced humanness in organizations. Glad to be her promotor and to have Fieke HarinckMargot van der Doef and Jojanneke van der Toorn join in the supervisory team. 

April 23rd, 2020: Michelle Brust’s first paper (in Dutch) was accepted! Brust, M., Gebhardt, W.A., Numans, M.E. & Kiefte-de Jong, J.C. (2020). Het benutten van teachable moments in de zorg. Nederlands Tijdschrift voor Geneeskunde.

March 12th, 2020: It was great fun to be with 17 kids from the MAVO 2 class at the Da Vinci College in Leiden, to talk about healthy lifestyles. They form the Raad van Kinderen (Children’s Council) that will advise the City of Leiden on how to raise awareness among young citizens of Leiden about the importance of healthy living.

March 1st, 2020: Kristell Penfornis started as our PhD student on the Pefect Fit project! excited to work together!

February 20th, 2020: A fun piece in the University Newspaper on our research on Social Influencers by Bart Braun.

January 2nd, 2020: For the new year a shorter version of my blog for Practical Health Psychology was posted on the Leiden Psychology Blog website.

December 19th, 2019: an interview about my work was posted on the university news!

December 17th, 2019: our paper on social influencers and alcohol posts has been accepted Frontiers in Psychology: Picture me drinking: Alcohol-related posts by Instagram influencers popular among adolescents and young adults, by Hanneke Hendriks, Danii Wilmsen, Wim Van Dalen, Winifred A. Gebhardt.

It received quite some media attention: February 1st 2020: Parool ; January 28th 2020: Emerce ; January 28th 2020: NWO ; January 24st 2020: NPO1 radio.

December 17th, 2019: My blog on self-identity processes was posted on Practical Health Psychology and translated into 28 languages! Really excited about this!

October 2019: The Healthy University Week was a wonderful week. Proud of my students!

May 14th 2019 was the launch of the MOOC on Population Health by Roos van der Vaart and others. I helped developing the module on Health and Health Behavior, and was interviewed for it.

August, 2019 I joined the team of the Dual PhD centre at Leiden University Campus in the Hague. Very happy to be coaching people who work and wish to pursue a PhD at the same time.

June 26th, 2019: We, a consortium chaired by the Leiden University Medical Center, received the news that our project “Perfect Fit” for digital lifestyle coaching was granted by the Netherlands Organisation for Scientific Research (NWO). One of the PhD students in this project will work on identity processes that accompany behavioral change (quitting smoking and exercising more). See (in Dutch):

On April 9th, 2019 Janice Sandjojo successfully defended her PhD thesis on Self-Management interventions for people with intellectual disabilities. A nice video (in Dutch) was made to explain the intervention and the evaluation study.

February, 2019: Michelle Brust started as a PhD student on the project “Teachable moments of health behavior change among cardiac patients and their partners”. Promotor and PI is Jessica Kiefte, I am her co-promotor.

October 11th, 2018: Hanneke Hendriks on Dutch television on the effect of alcohol advertisement on social media!

October 2nd, 2018: Eline Meijer’s sixth article of her PhD dissertation: “Identity processes in smokers who want to quit smoking: A longitudinal Interpretative Phenomenological Analysis” has been accepted in Health.

On October 17th, Leiden University has  officially become part of the Healthy University Networks. The first activities within this initiative were be the lunch-workshops for staff members on healthy lifestyles that our Master of Health Psychology students provided on October 18th and 19th 2018! Excited to have been the coordinator of their course in Health Promotion and Disease Prevention, and truly proud of them and their teachers Yvette Meuleman, Yvette Ciere and Roos van der Vaart.

September 18th, 2018: Janice Sandjojo’s article “Effects of a self-management training for people with intellectual disabilities”  has been accepted for publication in the Journal of Applied Research in Intellectual Disabilities. It is the third accepted paper as part of her PhD dissertation (with me as co-promotor), which she is going to submit to the reading committee in October.

August 21st, 2018: Excited and proud that at the opening ceremony of the European Health Psychology Conference in Galway I received the EHPS Honorary Fellowship Award. It is the EHPS award with the highest distinction granted in recognition of an exceptional contribution to the field of health psychology.

See also the newsitem on the Faculty’s website.

July 19th, 2018: News item at the UvA website on the Veni project of Hanneke Hendriks on alcohol posting behavior on the social media.

June 15th, 2018: Read Laura Kunst’s and my blog on “Party-drug use among students: Why (not) everyone is doing it”.  It was nominated for the Leiden Psychology Blog Award 2018

June 14th, 2018: Another article by our PhD student, Janice Sandjojo has been accepted. It is entitled: Promoting independence of people with intellectual disabilities: A focus group study. Perspectives from people with intellectual disabilities, legal representatives, and support staff, and will appear in the Journal of Policy and Practice in Intellectual Disabilities 

May 13th, 2018 & May 21st, 2018: The Journal of Medical Internet Research accepted our manuscript on “Social drinking on social media: A content analysis of the social aspects of alcohol-related posts on Facebook and Instagram”, written by Hanneke Hendriks (UvA), Bas van den Putte (UvA/Trimbos), Megan Moreno (University of Wisconsin Madison) and myself;

and Cyberpsychology, Behavior, and Social Networking accepted our (Hendriks, van den Putte and Gebhardt) paper on “Alcoholposts on Social Networking Sites: the Alcoholpost-Typology (APT)”.

April 12th, 2018: Eline Meijer’s article on “Strengthening quitter self-identity: An experimental study” has bee:n accepted in Psychology and Health. (authors: E. Meijer, W.A. Gebhardt, C. van Laar, B. van den Putte and Andrea W.M. Evers).

February 9th, 2018: the NNvT conference was a very inspiring day. Proud also to have given the keynote address on identity processes during quitting smoking.  I was also asked to write a column based on the content of the presentation for the newsletter of the Trimbos Institute.

Winnie keynote Nnvt

January 2018: Janice Sandjojo’s article on “Training staff to promote self-management in people with intellectual disabilities” was accepted by the Journal of Applied Research in Intellectual Disabilities  (authors; Janice Sandjojo, Aglaia Zedlitz, Winifred Gebhardt, Joop Hoekman, Elise Dusseldorp, Jeanet den Haan, Andrea Evers).

The manuscript by Laura Kunst, MSc and me on the “Prevalence and psychosocial correlates of party-drug use and associated problems among university students in the Netherlands” has been accepted for publication in Substance Use and Misuse.

December 2017: Excited to been invited to give a keynote presentation at the NNvT (Nederlands Netwerk voor Tabaksonderzoek) conference on February 9th, 2018.

December 2017: Eline Meijer had another of her papers accepted: Meijer, E., Van den Putte, B., Gebhardt, W. A., Van Laar, C., Bakk, Z., Dijkstra, A., Fong, G. T., West, R. & Willemsen, M. C. (accepted for publication). A longitudinal study into the reciprocal effects of identities and smoking behaviour: Findings from the ITC Netherlands Survey. Social Science and Medicine.

Shelley van der Veek and I have presented at the Faculty’s Food for Thought meeting (November 23rd, 2017) on visual methods to facilitate health behavioral change.

Eline Meijer has succesfully defended her PhD thesis “This is (not) who I am: Understanding identity in continued smoking and smoking cessation” on November 14th 2017, at the Groot Aditorium of the Academiegebouw of Leiden University.

October 2017: The article by Katja Cardol on “Exploring the direct or inverse association of physical activity with behavioral addictions and other self-regulation problems” has been accepted in Addiciones. It is based on her Master’s thesis research, which she conducted in Spain. [authors are: Cinderella K. Cardol, Cristopher I. Escamilla, Winifred A. Gebhardt & José C. Perales].

October 2017: Our paper on patients’ perceptions of conservative treatment for a small abdominal aortic aneurysm, by first author Stephanie Tomee has been accepted for publication in ‘Patient Preference and Adherence’.  Authors are: S.M. Tomee, W.A. Gebhardt, J.P. de Vries, V.C. Hamelinck, J.F. Hamming & J.H.N. Lindeman

On September 16th 2017 I gave a mini-lecture on how to use our ability to (mentally) travel through time to increase our health and wellbeing at the Night of the Arts and Knowledge in Leiden’s Botanical Gardens. A brief impression of the spectacular event can be found on Youtube. I was also interviewed by Radio Sleutelstad (the Leiden local Radio Station).

September 2017: In the Mare (Leiden University weekly journal) an item about healthy lifestyles among university students: The future is non-existent (… or is it?).

July 2017: Hanneke Hendriks article on the motives behind posting alcohol-related messages on social network sites can be accessed through Must say that it is a lot of fun working with Hanneke and Bas van den Putte on Hanneke’s Veni project (

See also:

May 2017: Three new publications that I co-authored have been accepted.

Hendriks, H., Gebhardt, W.A. & van den Putte, S.J.H.M. Alcohol-related posts from young people on social networking sites: Content and motivations. Cyberpsychology, Behavior, and Social Networking.

Claes, N. & Gebhardt, W.A. Chronic pain and goal frustration. Chapter in: P. Karoly & G. Crombez (eds). Motivational Perspectives on Chronic Pain: Theory, Research, and Practice.

Meijer, E., van Laar, C., Gebhardt, W.A., Fokkema, M., van den Putte, S.J.H.M., Dijkstra, A., Fong, G., Willemsen, M. Identity change among smokers and ex-smokers: Findings from the ITC Netherlands SurveyPsychology of Addictive Behaviors.

November 2016: My commentary “Multiple goal perspective and social identification processes” appeared in Addiction.

On November 18th, 2016: I was a presentor at the Nationaal Psychologie Congres. [Title was: “Niet omdat het moet, maar omdat het bij mij past” see nipsps-mc-15-11-16]

On May 18th, 2016: I have presented a guest lecture at the University of Lucerne, entitled

Okay, okay, it is good for my health… but is it good for me? How individual health behavior is governed by self-views, social identity, and personal goals.

It was part of a series on “Health Behavior Change: From Theory to Reality

see also: Blogs

January 2nd, 2020: For the new year a shorter version of my blog for Practical Health Psychology was posted on the Leiden Psychology Blog website.

December 17th, 2019: My blog on self-identity processes was posted on Practical Health Psychology and translated into 28 languages! Really excited about this!

June 15th, 2018: Read Laura Kunst’s and my blog on “Party-drug use among students: Why (not) everyone is doing it”.

February 19th, 2014 on Leiden Psychology Blog: Raising the minimal legal drinking age: the best preventive measure thinkable.