Gunnhild Johnsen Hjetland

Norwegian Institute of Public Health · Department of Health Promotion

Background The intensive use of social media among adolescents has caused concern about its impact on their mental health, but studies show that social media use is linked to both better and worse mental health. These seemingly contradictory findings may result from the diverse motivations, interactions, and experiences related to social media use,...

Background Social media use, perfectionism, and disordered eating have all increased over the last decades. Some studies indicate that there is a relationship between self-presentation behaviors and being exposed to others’ self-presentation on social media, and disordered eating. Studies also show that the relationship between focus on self-presen...

Social media plays a significant role in adolescents’ lives, with both positive and negative effects. Implementing interventions to mitigate the negative aspects and enhance the positive ones could improve adolescents’ well-being. Unfortunately, there is a scarcity of evidence-based interventions available. To fill this gap, we have developed a sch...

Purpose Previous approaches used to assess problematic social media use risk inflating prevalence numbers and classifying unproblematic social media use as problematic. The main aim of this study was to take an exploratory view as to how different types of activities, experiences, and motivations on social media are associated with problematic ment...

Background The intensive use of social media among adolescents has caused concern about its impact on their mental health, but studies show that social media use is linked to both better and worse mental health. These seemingly contradictory findings may result from the diverse motivations, interactions, and experiences related to social media use,...

Background Social media (SOME) use has been linked to psychological problems in some studies, but the results are mixed. Digital stress may explain the link between SOME and mental health, but the underlying components that constitute the subjective stress experience that may stem from SOME use remain uncertain. Different conceptualizations of digi...

Background Social media use, perfectionism and eating disturbance has all increased over the last decades. Some studies indicate that there is a relationship between focus on self-presentation and social media, as well as how other present themselves on social media and eating disturbances. Nevertheless, no previous studies have investigated the li...

Background Previous approaches used to assess problematic social media use risk inflating prevalence numbers and classify unproblematic social media use as addictive or problematic. The main aim of this study was to take an exploratory view as to how different types of activities, experiences, and motivations on social media are associated with pro...

Background Cyberbullying has been widely studied and is associated with poor mental health outcomes in adolescents. However, adolescents frequently also experience a range of other negative experiences, such as name-calling, exclusion, and unwanted attention or contact from others. Few previous studies have investigated how adolescents’ mental heal...

Background Social media use, perfectionism, and eating disturbances have all increased over the last decades. Some studied indicate that there is a relationship between being exposed to others self-presentation on social media and eating disturbances. Studies also show that the relationship between focus on self-presentation and highly visual socia...

Introduction Cyberbullying has been extensively studied and is associated with adverse mental health outcomes in adolescents. However, adolescents may also experience a range of other negative experiences, such as name-calling, threats, exclusion, and unwanted attention or contact from others. Few studies have investigated how adolescents’ mental h...

Background Adolescents’ presence on Social Media (SoMe) facilitates peer connections making them susceptible to peer-influences and approval. Negative experiences on SoMe can affect adolescent stress and wellbeing, impelling their use of alcohol. This paper provides a novel understanding of the relationship between negative experiences on SoMe and...

Introduction Social media use is part of everyday life for adolescents. Over the last decade, concerns about the potential negative effects of social media use on mental health and well-being has been raised. Possible positive effects of social media use have to a lesser extent been explored. However, some studies have found associations between so...

Upward social comparison and aspects of self-presentation on social media such as feedback-seeking and strategic self-presentation may represent risk factors for experiencing negative mental health effects of social media use. The aim of this exploratory study was to assess how adolescents differ in upward social comparison and aspects of self-pres...

Background Adolescents’ presence on Social Media (SoMe) facilitates peer-connections making them susceptible to peer-influences and approval. Negative experiences on SoMe can affect adolescent stress and wellbeing, impelling their use of alcohol. This paper provides a novel understanding of the relationship between negative experiences on SoMe and...

Objectives To investigate the association between subjective socioeconomic status (SES) and a) frequency and daily duration of social media use, and b) self-reported negative experiences on social media platforms. Methods The present study is based on the cross-sectional school-based “LifeOnSoMe”-study (N = 3,415) recruiting high school students a...

Aspects of self-presentation on social media such as feedback-seeking, strategic self-presentation, and social comparison, may represent risk factors for experiencing negative mental health effects of social media use. The aim of this exploratory study was to assess how adolescents differ in aspects of self-presentation on social media, and whether...

The aim of this study was to assess the relationship between daily screen time and sleep, evening screen time and sleep, and between social media addiction and sleep in a student population. This cross-sectional study is based on data from a national survey of all college and university students in Norway (the SHoT2018 study; n = 49,051). The sleep...

Bright light treatment is an effective way to influence circadian rhythms in healthy adults, but previous research with dementia patients has yielded mixed results. The present study presents a primary outcome of the DEM.LIGHT trial, a 24-week randomized controlled trial conducted at nursing homes in Bergen, Norway, investigating the effects of a b...

Social media (SoMe) activity constitutes a large part of the lives of adolescents. Even though the behavior on SoMe is complex, the research on SoMe has mostly focused on negative effects, bad content, and online antisocial behavior (OAB). Less research has been conducted on online prosocial behavior (OPB), and to what extent OPBs are widespread is...

The extent of mental health problems among adolescents seems to be on the rise, and this observed trend has often been linked to a coinciding increase in social media use. The goal of the current preliminary study was to investigate how senior high school personnel experience the role of social media in relation to the mental health of their pupils...

Background The majority of people with dementia have behavioral and psychological symptoms of dementia (BPSD), including depression, anxiety and agitation. These may be elicited or aggravated by disrupted circadian rhythms. Bright light treatment (BLT) is a promising non-pharmacological approach to the management of BPSD, but previous research has...

Background Up to 70% of nursing home patients with dementia suffer from sleep problems. Light is the main zeitgeber to the circadian system and thus has a fundamental impact on sleep-wake behaviour. Low indoor light levels in nursing homes have been reported, and in combination with age-related reductions in light sensitivity, insufficient light ex...

Background During the last decade, social media has permeated most parts of society. Adolescents are particularly active users of social media, and their use has been suggested as a contributing factor to mental health issues in this group. Quantitative studies have found associations between the frequency and/or duration of social media use and mo...

Social media (SOME) use among adolescents has been linked to mental health and well-being. SOME self-presentation has been highlighted as an important factor to better understand the potential links. The aims of this study were to investigate the association between focus on SOME self-presentation and mental health and quality of life among adolesc...

Adequate illumination plays an important part in providing a healthy environment for nursing home patients with dementia. With increasing awareness of non-visual responses to light, new approaches to quantifying illuminance have emerged. In the present study, we assessed the illuminance in nursing home dementia units in terms of melanopic equivalen...

Background: During the last decade, social media has permeated most parts of society. Adolescents are particularly active users of social media, and their use has been suggested as a contributing factor to mental health issues in this group. Quantitative studies have found associations between the frequency and/or duration of social media use and m...

Background Social media use among adolescents has been linked to mental health and well-being. However, most of the studies investigating this association focus primarily on frequency and duration of use, providing little knowledge of how various types of social media activities may be differentially linked to mental health and well-being. A recent...

Introduction: Social media has become an integrated part of daily life, with an estimated 3 billion social media users worldwide. Adolescents and young adults are the most active users of social media. Research on social media has grown rapidly, with the potential association of social media use and mental health and well-being becoming a polarized...

Background: Disrupted sleep is common among nursing home patients with dementia and is associated with increased agitation, depression, and cognitive impairment. Detecting and treating sleep problems in this population are therefore of great importance, albeit challenging. Systematic observation and objective recordings of sleep are time-consuming...

Dementia is a devastating disease with a global impact, and there is an urgent need for effective interventions to alleviate the accompanying disturbances in behavior, mood, sleep, and circadian rhythms. Bright light treatment (BLT) is a promising non-pharmacological intervention; however, studies have yielded conflicting results. This systematic r...

The present pilot study investigated neuronal correlates of executive functioning in patients previously diagnosed with recurrent major depressive disorder (MDD). The aim of the study was to examine a partially remitted and remitted MDD patient group with functional magnetic resonance imaging (fMRI) using a cognitive activation paradigm in order to...

We present a pilot study and two main studies that address the nature of stereotypes of social groups in Norway within the framework of the Stereotype Content Model (SCM). The first study focused on stereotypes of a wide range of groups across categories such as gender, age, religious conviction, socioeconomic and health status. The second study fo...