** Paranormal Activity 4 It takes almost no effort or ingenuity to keep the this franchise going. Same conceit, new home. These are the movies of our times: housing angst, recording devices everywhere, quiet suburban disorder. This time a little weirdo spends time with the family across the street and lots of digital cameras record what happens. The air is suspenseful calm. The ending is virtually plagiarized. (88 min., R) (Wesley Morris)
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