The Turner prize show: voices, videos and erotic tickling sticks

Has the Turner prize lost its power to shock? No – thanks to James Richards’s sphincter shots. But it’s Tris Vonna-Michell’s spellbinding spoken-word travelogues that deserve to win

Ai Weiwei, Modern Toss, The Turner Prize: this week’s new exhibitions

From Ai Weiwei’s show at Blenheim Palace to The Turner Prize in London, Skye Sherwin and Robert Clark find out what’s happening in art around the country