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Nowadays, the limitless availability to the World Wide Web can lead to general Internet misuse and dependence. Currently, problematic Internet, smartphone and social media use belong to the most prevalent behavioral addictions. However, the neurobiological background of these Internet related behavioral addictions is not sufficiently explored. In this study, these addiction forms were assessed with self-reported questionnaires. Resting-state functional magnetic resonance imaging was acquired for all participants (n=72, 36 males) to examine functional brain networks. The resting-state networks that were discovered using independent component analysis were analyzed to estimate within network differences. Significant negative associations with problematic Internet use, social media addiction and smartphone addiction were found in the language network, the lateral and medial visual networks, the auditory network, the sensorimotor network and the executive network. Our study suggests that problematic Internet, smartphone and social media use can cause alterations in sensory processing and higher cognitive functioning.

Currently narcissism is considered one of the most widespread modern "diseases". As a consequence, its different types (grandiose and vulnerable narcissism) have been approached from several different perspectives. The present research attempts to investigate the differences between the two types of narcissism and their links with different cognitive components that are connected to these personality traits. The primary aim of our study is to investigate the maladaptive schemas (entitlement, vulnerability, emotional deprivation) and cognitive evaluation systems (self-esteem, systemizing-empathizing) associated with narcissism. In order to ensure the associations of the observed constructs, we used correlational and a specific form of structural equation modelling (SEM), pathway analysis.The results show that the early maladaptive schemas have a large impact on the development of narcissism and on the empathizing system. The different subtypes of narcissism have different effects on self-esteem, while gender and age have a minor effect on self-esteem and the empathizing system too. Hopefully, these empirical results can be applied in counselling as well as in clinical practice.