Hidden messages that promote products in films once caused a moral panic. But is the much-feared technique really effective? The BBC's Phil Tinline helped devise an experiment to find out. On 12 ...

BBC R&D were approached last year by Radio 4 documentary producer Phil Tinline to help with a documentary he was putting together surrounding the myths and truths of subliminal advertising in video.

Recently, I holed up indoors with my family watching old sci fi movies, including The Puppet Masters, a story about alien blobs that sit on people's backs and wire themselves into human nervous ...