| Ty Burr
Co-directors Henry Joost and Ariel Schulman cut their teeth on 2010's glib social-media mystery "Catfish,'' and since they're clever boys, they make the most of the series' new toy. Otherwise, Paranormal Activity 3 is almost identical to, and just as eerily effective as, the first two films in its alternation of cheesy "boo!'' tactics and genuine scares. Read full review