The internet is of interest for sociologists in three views at least: as a tool for research, for example by using online questionnaires instead of paper ones, as a discussion platform (see 'External links' section below), and as a research topic. Sociology of the internet in the last sense includes analysis of online communities (. as found in newsgroups) and virtual communities, organisational change catalysed through new media like the internet as well as societal change at-large in the transformation from industrial to informational society (or to information society).
In a study conducted by Reilly et al., (1998) using 268 long term users of cannabis with regular usage of at least three times per week, the subjects gave reasons for their cannabis use as mainly for relaxation, having a feel good effect and to alleviate stressors in their day to day lives. They however reported feelings of anxiety or depression, lack of motivation, exhibition of paranoid ideation and some also reported respiratory symptoms. Beer (2007) explained that certain individuals with a Valine modification in the dopamine-regulating COMT (catechol-O-methyl transferase) gene are vulnerable to developing psychosis and cannabis can exacerbate psychosis in individuals with this defect in their genome. Experiments conducted by D'Souza et al (2004) described the existence of positive and negative symptoms of schizophrenia in the healthy people in their study who were given cannabis intravenously and also a transient acute psychotic episode in others. Early commencement of cannabis use on a frequent basis was noted as a strong predictor in the individual's future addiction to cannabis and an important relation to depression (Kalant, 2004). He further showed that there is evidence that memory and information processing in the children of women who are chronic users of cannabis were permanently affected and a susceptibility to other illicit drugs dependence in later life owing to early exposure.