feelings of depression and inadequacy. Social psychologist Ethan Kross, the lead author of the study, stated that the research tracked (on a moment-to-moment basis throughout the day) how a person's mood fluctuated during time spent on Facebook and whether or not they modified their Facebook usage. Results suggest that as participants spent more time on Facebook, their feelings of well-being decreased and feelings of depression increased. Another study found that participants in the highest quartile for social media site visits per week were at an increased likelihood of experiencing depression. Social isolation and ostracism Excessive social media usage increases feelings of social isolation, as virtual relationships replace authentic social interactions. Additionally, one study found that social rejection or ostracism in an immersive virtual environment has a negative impact on affect (emotion), in the same way, that ostracism negatively impacts emotions in real life contexts. The size of an individual's online social network is closely linked to brain structure associated with social cognition. Because of the access people have had to internet technologies, some behaviors can be characterized as information foraging. Information foraging is the theory of how people navigate the web to satisfy an informational need. It essentially says that, when users have a certain information goal, they assess the information that they can extract from any candidate source of information relative to the cost involved in extracting that information and choose one or several candidate sources so that they maximize the ratio. From a social standpoint, the internet is a breeding ground for creating a space for relationships, roles, and a new sense of self. Negative relationships One survey found that a high level of Facebook usage is associated with adverse relationship outcomes (such as divorce and breaking up) and that these negative outcomes are mediated by conflict about high levels of Facebook use. However, this was only true for those who are or have been, in relatively newer relationships of three years or less. To cope with the uncertainty of a suspected romantic relationship, partner surveillance on Facebook is becoming more popular. However, skepticism between couples may inevitably cause the end of a relationship. It is important to note that these findings do not demonstrate causality: relationship maintenance behaviors, such as surveillance and monitoring, are indicators of current levels of trust within the relationship. This suggests that certain behaviors on social media may be predicting negative outcomes, rather