Many people's lives are being strongly influenced by social media. Smartphones and tablet PCs can widen people's horizons, but are potentially addictive. Some experts are warning that Internet usage can have unwanted side effects, but others disagree.
These days many people are online constantly. German brain researcher Manfred Spitzer warns that young people, in particular, risk contracting "digital dementia". He believes that, in the Internet is addictive and, in the long term, makes people dumb.