I suspect that product placement in moves is both effective and somewhat subliminal. The real issue is the limits on effect. Flashing messages is not going to get someone to kill some dictator but:
"Subconscious stimuli by single words is well known to be modestly effective in changing human behavior or emotions. This is evident by a pictorial advertisement that portrays four different types of rum.rocks The phrase "U Buy" was embedded somewhere, backwards in the picture. A study was done to test the effectiveness of the alcohol ad. Before the study, participants were able to try to identify any hidden message in the ad, none found any. In the end, the study showed 80% of the subjects unconsciously perceived the backward message, meaning they showed a preference for that particular rum.[2]" (From your link:http://en.wikipedia.org/wiki/Subliminal_stimuli)
I suspect that product placement in moves is both effective and somewhat subliminal. The real issue is the limits on effect. Flashing messages is not going to get someone to kill some dictator but:
"Subconscious stimuli by single words is well known to be modestly effective in changing human behavior or emotions. This is evident by a pictorial advertisement that portrays four different types of rum.rocks The phrase "U Buy" was embedded somewhere, backwards in the picture. A study was done to test the effectiveness of the alcohol ad. Before the study, participants were able to try to identify any hidden message in the ad, none found any. In the end, the study showed 80% of the subjects unconsciously perceived the backward message, meaning they showed a preference for that particular rum.[2]" (From your link:http://en.wikipedia.org/wiki/Subliminal_stimuli)