Abstract Despite the common belief that spending excessive time on social media apps harms adolescents' daily functioning, the impact of screen time is likely to differ depending on how well the use of social media aligns with adolescents' psychological needs for autonomy, competence, and relatedness. Grounded in self-determination theory, the aim of this study was to examine how both screen time and basic psychological needs on social media relate to adolescents’ daily goal striving and affective states. To this end, a 7-day diary study was conducted, and screen time (i.e. duration and frequency) was monitored objectively through an application on adolescents’ smartphones. In two daily surveys, participants reported on their basic psychological needs (i.e. satisfaction and frustration of the needs for autonomy, competence and relatedness) when spending time on social media, their experienced goal interference (i.e. guilt, goal conflict and rumination) and their affective states (i.e. positive and negative affect). Examining the data of 107 adolescents (M age = 15.28 years, SD = 1.66, range = 12–19; 53.3% female), multilevel path analyses revealed that, at the daily level, frustration of the basic psychological needs on social media was associated with temporary increases in guilt, goal conflict and negative affect. On the contrary, when adolescents felt satisfied with their needs during their time on social media, they reported better affective states. The duration of screen time also yielded an interfering effect (i.e. main effect), but this effect was attenuated when adolescents experienced high need satisfaction during their time on social media (i.e. interaction effect). Some lingering effects were found, with need satisfaction on SMU in the afternoon predicting lower guilt and goal conflict and need frustration on SMU relating to elevated rumination in the evening. These findings highlight the complex interplay between basic psychological needs on SMU and screen time for adolescents’ daily goal striving and affective well-being.

Individual internet users are commonly considered the weakest links in the cybersecurity chain. One reason for this is that they tend to be overoptimistic regarding their own online safety. To gain a better understanding of the cognitive processes involved in this assessment, the current study applies an extended version of the protection motivation theory. More specifically, this study includes perceived knowledge and internet trust to discover how these antecedents influence the threat and coping appraisal processes. Based on representative survey data collected from 967 respondents, we found that people who feel well-informed about online safety feel less vulnerable to cybercrime and are less inclined to take security measures. At the same time, feeling informed is associated with being more convinced of the severity of cybercrime. High levels of trust in the safety of the internet are linked to the feeling that one is less vulnerable to cybercrime and the perception that cybercrime is not a severe threat. Future interventions should remind internet users about their own perceived vulnerability and the risks that exist online while ensuring that internet users do not lose their trust in the internet and confidence in their own online knowledge.

Social support is a prominent factor in mental health etiology. According to the social support deterioration model, exposure to chronic stressors may over time erode people's social support, thereby contributing to increases in mental health issues. Although there is mounting evidence indicating the beneficial consequences of online social support, the extent to which social support deterioration takes place in an online context is to date not investigated. In this study, we tested if exposure to financial stress is associated with depressive symptoms and whether this association can be explained by decreases in both perceived online and offline social support respectively. Using data from a 2016 survey of a representative sample of inhabitants of Ghent (Belgium) (n = 1150, 51.5% female, Mage = 45.4, SDage = 15.9), we were able to confirm that a reduction in perceived online social support mediates the positive association of financial stress exposure with depressive symptoms, albeit only weakly and indirectly via its association with perceived offline social support. Our findings suggest that the association of online social support with respect to financial stress and mental health is comparable to its offline counterpart, yet its part should not be overstated. These findings allow us to discuss the offline role of online social support.

This article examines how peer communication among adolescents (14–16 years) affects the evaluation of social advertising (i.e. targeted ad that adopts the social proof heuristic by using an individual’s social ties as endorsers for a brand) on social networking sites (SNSs). More precisely, the focus lies on how engaging in online peer chatting on these social platforms alters persuasion knowledge and attitude towards the ad. In order to test this, two between-subjects experiments were conducted in which adolescents chatted with peers on a mock SNS that contained a social ad. In Experiment 1, results reveal that a social ad generates a more positive attitude among adolescents when they have engaged in online peer communication, and at the same time, triggers less persuasion knowledge. In Experiment 2, the depth of the relationship between the chatters (tie strength) plays a significant moderating role as peer communication with strong ties yields greater effects, compared to communication with weak ties. These findings reveal important social influence dynamics that may alter the elaboration of persuasive communication, leading to valuable theoretical and practical implications.

Users of social network sites (SNSs) use three main strategies that help to manage the privacy of their profile information: (1) limiting the level of data revealed, (2) using privacy settings to exert control over data and (3) audience/friendship management by being restrictive about whom to accept as a ‘friend’. Extant research does not show whether these strategies operate as independent mechanisms or whether they are interdependent and work as a system. Given what offline privacy theorist Irwin Altman (1977 Altman, Irwin. 1977. “Privacy Regulation: Culturally Universal or Culturally Specific?” Journal of Social Issues 33 (3): 66–84. doi: 10.1111/j.1540-4560.1977.tb01883.x[Crossref], [Web of Science ®] , [Google Scholar]) designates as the multi-mechanic nature of privacy protection, we test a model in which we expect to find that the three discerned strategies are related to one another. Structural equation modelling analysis performed on the subsample (n = 1564) of our study’s data – collected among 1743 adolescents by means of a paper-and-pencil survey – demonstrates that, in line with Altman’s vision of privacy protection, the three discerned strategies effectively operate as an interdependent system. In congruence with the hypotheses derived from extant research, we found that adolescents’ level of disclosure influences adolescents’ involvement in the two other discerned strategies: Adolescents with high levels of personal information disclosure share an increased tendency to have many friends on SNSs and a lower level of using privacy settings.