Gunnhild Johnsen Hjetland
Postdoc
Contact
Send email {model.translations.sendEmailTo} GunnhildJohnsen.Hjetland@fhi.no
Department
Responsibilities
Mental health, health promotion, social media, sleep
Projects and publications
- Rachana Aryal, Gunnhild Johnsen Hjetland, Ellen Merethe Melingen Haug, Oddrun Samdal, Jens Christoffer Skogen, (2025). Online Personas: Associations Between Focus on Self-Presentation and Social Comparison on Social Media and Mental Well-Being in Early Adolescence. International Journal of Public Health doi: 10.3389/ijph.2025.1608425
- Gunnhild Johnsen Hjetland, Jens Christoffer Skogen, Mari Hysing, Michael Gradisar, Børge Sivertsen, (2025). How and when screens are used: comparing different screen activities and sleep in Norwegian university students. Frontiers in Psychiatry doi: 10.3389/fpsyt.2025.1548273
- Gunnhild Johnsen Hjetland, Turi Reiten Finserås, Børge Sivertsen, Ian Colman, Randi Træland Hella, Amanda Iselin Olesen Andersen, Jens Christoffer Skogen, (2024). Digital self-presentation and adolescent mental health: Cross-sectional and longitudinal insights from the “LifeOnSoMe”-study. BMC Public Health doi: 10.1186/s12889-024-20052-4
- Hilde Einarsdatter Danielsen, Turi Reiten Finserås, Amanda Iselin Olesen Andersen, Gunnhild Johnsen Hjetland, Vivian Irena Woodfin, Jens Christoffer Skogen, (2024). Mirror, mirror on my screen: Focus on self-presentation on social media is associated with perfectionism and disordered eating among adolescents. Results from the “LifeOnSoMe”-study. BMC Public Health doi: 10.1186/s12889-024-19317-9
- Amanda Iselin Olesen Andersen, Turi Reiten Finserås, Gunnhild Johnsen Hjetland, Tormod Bøe, Børge Sivertsen, Ian Colman, Randi Træland Hella, Jens Christoffer Skogen, (2024). Can Social Media Use Be More Health-Promoting? Description and Pilot Evaluation of a School-Based Program to Increase Awareness and Reflection on the Use of Social Media. Sage Open doi: 10.1177/21582440241249538
- Turi Reiten Finserås, Gunnhild Johnsen Hjetland, Børge Sivertsen, Ian Colman, Randi Træland Hella, Amanda Iselin Olesen Andersen, Jens Christoffer Skogen, (2023). Reexploring Problematic Social Media Use and Its Relationship with Adolescent Mental Health. Findings from the “LifeOnSoMe”-Study. Psychology Research and Behavior Management s. 5101-5111. doi: 10.2147/PRBM.S435578
- Jens Christoffer Skogen, Amanda Iselin Olesen Andersen, Turi Reiten Finserås, Priya Ranganath, Geir Scott Brunborg, Gunnhild Johnsen Hjetland, (2023). Commonly reported negative experiences on social media are associated with poor mental health and well-being among adolescents: results from the “LifeOnSoMe”-study. Frontiers in Public Health doi: 10.3389/fpubh.2023.1192788
- Priya Ranganath, Gunnhild Johnsen Hjetland, Turi Reiten Finserås, Geir Scott Brunborg, Morten Hesse, Jens Christoffer Skogen, (2022). Negative experiences, social exclusion and unwanted attention on social media: exploring the association with adolescent alcohol use. BMC Public Health doi: 10.1186/s12889-022-14679-4
- Bjarte Birkeland Kysnes, Gunnhild Johnsen Hjetland, Ellen Merethe Melingen Haug, Ingrid Holsen, Jens Christoffer Skogen, (2022). The association between sharing something difficult on social media and mental well-being among adolescents. Results from the “LifeOnSoMe”-study. Frontiers in Psychology doi: 10.3389/fpsyg.2022.1026973
- Gunnhild Johnsen Hjetland, Turi Reiten Finserås, Børge Sivertsen, Ian Colman, Randi Træland Hella, Jens Christoffer Skogen, (2022). Focus on Self-Presentation on Social Media across Sociodemographic Variables, Lifestyles, and Personalities: A Cross-Sectional Study. International Journal of Environmental Research and Public Health (IJERPH) doi: 10.3390/ijerph191711133
- Jens Christoffer Skogen, Tormod Bøe, Turi Reiten Finserås, Børge Sivertsen, Randi Træland Hella, Gunnhild Johnsen Hjetland, (2022). Lower Subjective Socioeconomic Status Is Associated With Increased Risk of Reporting Negative Experiences on Social Media. Findings From the “LifeOnSoMe”-Study. Frontiers in Public Health doi: 10.3389/fpubh.2022.873463
- Eirin Kolberg, Ståle Pallesen, Gunnhild Johnsen Hjetland, Inger Hilde Nordhus, Elisabeth Flo-Groeneboom, (2021). The effect of bright light treatment on rest–activity rhythms in people with dementia: A 24 week cluster randomized controlled trial. Clocks & Sleep s. 449-464. doi: 10.3390/clockssleep3030032
- Gunnhild Johnsen Hjetland, Jens Christoffer Skogen, Mari Hysing, Børge Sivertsen, (2021). The Association Between Self-Reported Screen Time, Social Media Addiction, and Sleep Among Norwegian University Students. Frontiers in Public Health doi: 10.3389/fpubh.2021.794307
- Christoffer Lysenstøen, Tormod Bøe, Gunnhild Johnsen Hjetland, Jens Christoffer Skogen, (2021). A Review of the Relationship Between Social Media Use and Online Prosocial Behavior Among Adolescents. Frontiers in Psychology doi: 10.3389/fpsyg.2021.579347
- Gunnhild Johnsen Hjetland, Viktor Schønning, Bodil Elisabeth Valstad Aasan, Randi Træland Hella, Jens Christoffer Skogen, (2021). Pupils’ use of social media and its relation to mental health from a school personnel perspective: A preliminary qualitative study. International Journal of Environmental Research and Public Health (IJERPH) s. 1-15. doi: 10.3390/ijerph18179163
- Eirin Kolberg, Gunnhild Johnsen Hjetland, Eirunn Thun, Ståle Pallesen, Inger Hilde Nordhus, Bettina S. Husebo, Elisabeth Flo-Groeneboom, (2021). The effects of bright light treatment on affective symptoms in people with dementia: a 24-week cluster randomized controlled trial. BMC Psychiatry doi: 10.1186/s12888-021-03376-y
- Gunnhild Johnsen Hjetland, Eirin Kolberg, Ståle Pallesen, Eirunn Thun, Inger Hilde Nordhus, Bjørn Bjorvatn, Elisabeth Flo-Groeneboom, (2021). Ambient bright light treatment improved proxy-rated sleep but not sleep measured by actigraphy in nursing home patients with dementia: a placebo-controlled randomised trial. BMC Geriatrics doi: 10.1186/s12877-021-02236-4
- Eirin Kolberg, Ståle Pallesen, Gunnhild Johnsen Hjetland, Inger Hilde Nordhus, Eirunn Thun, Elisabeth Flo-Groeneboom, (2021). Insufficient melanopic equivalent daylight illuminance in nursing home dementia units across seasons and gaze directions. Lighting Research and Technology doi: 10.1177/1477153521994539
- Jens Christoffer Skogen, Gunnhild Johnsen Hjetland, Tormod Bøe, Randi Træland Hella, Ann Kristin Knudsen, (2021). Through the looking glass of social media. Focus on self-presentation and association with mental health and quality of life. A cross-sectional survey-based study. International Journal of Environmental Research and Public Health (IJERPH) s. 1-16. doi: 10.3390/ijerph18063319
- Gunnhild Johnsen Hjetland, Viktor Schønning, Randi Træland Hella, Marius Veseth, Jens Christoffer Skogen, (2021). How do Norwegian adolescents experience the role of social media in relation to mental health and well-being: a qualitative study. BMC Psychology s. 1-14. doi: 10.1186/s40359-021-00582-x
- Viktor Schønning, Gunnhild Johnsen Hjetland, Leif Edvard Aarø, Jens Christoffer Skogen, (2020). Social Media Use and Mental Health and Well-Being Among Adolescents – A Scoping Review. Frontiers in Psychology doi: 10.3389/fpsyg.2020.01949
- Gunnhild Johnsen Hjetland, Inger Hilde Nordhus, Ståle Pallesen, Jeffrey Cummings, Rochelle E. Tractenberg, Eirunn Thun, Eirin Kolberg, Elisabeth Flo, (2020). An Actigraphy-Based Validation Study of the Sleep Disorder Inventory in the Nursing Home. Frontiers in Psychiatry s. 1-13. doi: 10.3389/fpsyt.2020.00173
- Gunnhild Johnsen Hjetland, Ståle Pallesen, Eirunn Thun, Eirin Kolberg, Inger Hilde Nordhus, Elisabeth Flo, (2020). Light interventions and sleep, circadian, behavioral, and psychological disturbances in dementia: A systematic review of methods and outcomes. Sleep Medicine Reviews s. 1-12. doi: 10.1016/j.smrv.2020.101310
- Åsa Hammar, Emanuel Neto, Leila Clemo, Gunnhild Johnsen Hjetland, Kenneth Hugdahl, Rebecca Elliott, (2016). Striatal hypoactivation and cognitive slowing in patients with partially remitted and remitted major depression. PsyCh Journal s. 191-205. doi: 10.1002/pchj.134
- Hege Høivik Bye, Henrik Herrebrøden, Gunnhild Johnsen Hjetland, Guro Ø. Røyset, Linda L. Westby, (2014). Sterotypes of Norwegian Social Groups. Scandinavian Journal of Psychology s. 469-476. doi: 10.1111/sjop.12141
- Marit Knapstad, Gunnhild Johnsen Hjetland, Turi Reiten Finserås, Robert Smith, (2025). Evaluering av veiledet internettbehandling ved Rask psykisk helsehjelp: En randomisert kontrollert studie .
- Marit Knapstad, Jens Christoffer Skogen, Gunnhild Johnsen Hjetland, Thomas Sevenius Nilsen, Tony Mathias Leino, Ragnhild Bang Nes, Leif Edvard Aarø, (2022). Folkehelseundersøkinga i Vestland 2022: Framgangsmåte og utvalde resultat .
- Gunnhild Johnsen Hjetland, Turi Reiten Finserås, Jens Christoffer Skogen, (2022). Hele verden er et tastetrykk unna – Ungdommers bruk og opplevelser med sosiale medier og online gaming .
- Jens Christoffer Skogen, Thomas Sevenius Nilsen, Gunnhild Johnsen Hjetland, Marit Knapstad, Ragnhild Bang Nes, Leif Edvard Aarø, Øystein Vedaa, (2020). Folkehelseundersøkelsen i Rogaland 2020: Fremgangsmåte og utvalgte resultater.
- Turi Reiten Finserås, Gunnhild Johnsen Hjetland, Børge Sivertsen, Ian Colman, Randi Træland Hella, Amanda Iselin Olesen Andersen, Jens Christoffer Skogen, (2023). Reexploring problematic social media use and the relationship with adolescent mental health.
- Gunnhild Johnsen Hjetland, Turi Reiten Finserås, Amanda Iselin Olesen Andersen, (2023). Kunnskapsministeren feier mobilen under teppet. Forskning.no
- Gunnhild Johnsen Hjetland, Eirin Kolberg, Ståle Pallesen, Eirunn Thun, Inger Hilde Nordhus, Bjørn Bjorvatn, Elisabeth Flo-Groeneboom, (2020). Ambient bright light treatment improved subjectively measured sleep but not sleep measured by actigraphy in nursing home patients with dementia: A placebo-controlled randomized trial.
- Elisabeth Flo, Eirunn Thun, Gunnhild Johnsen Hjetland, (2019). Lys som intervensjon for personer med demens. SØVN s. 20-27.
- Gunnhild Johnsen Hjetland, Eirin Kolberg, Elisabeth Flo, (2019). DEM.LIGHT: Lysterapirom for betra søvn, døgnrytme, åtferd og humør hos sjukeheimspasientar med demens.
- Gunnhild Johnsen Hjetland, (2019). DEM.LIGHT: Lysterapirom for sjukeheimspasientar med demens.
- Gunnhild Johnsen Hjetland, (2018). Lysterapirom for sykehjemspasienter med demens.
- Gunnhild Johnsen Hjetland, (2018). DEM.LIGHT: Lysterapirom for betra søvn, døgnrytme, atferd og humør hos sjukeheimspasientar med demens.
- Gunnhild Johnsen Hjetland, Eirin Kolberg, Eirunn Thun, Ståle Pallesen, Inger Hilde Nordhus, Elisabeth Flo, (2018). Designing of diurnal light conditions for improved circadian rhythms in dementia - An intervention study.
- Gunnhild Johnsen Hjetland, Inger Hilde Nordhus, Ståle Pallesen, Eirunn Thun, Eirin Kolberg, Elisabeth Flo, (2018). Placebo conditions and blinding in bright light therapy studies on dementia: A systematic review.