NEW YORK — A new study confirms what your 130 Facebook friends and scores of Twitter followers may have already told you: The Internet and mobile phones are not linked to social isolation.

Online activities such as e-mail, blogging and frequenting Internet hangouts can even lead to larger, more diverse social networks, according to the study released Wednesday by the Pew Internet and American Life Project. The study refutes research earlier in the decade suggesting that people’s growing embrace of technology has come at the expense of close human connections.