Here's a fun test to check how perceptive you are. The following images are from the"Subtle Changes" contest that took place at www.worth1000.com. Something is subtlety altered in these images, see if you can find what it is. Subliminal messages use exactly the same principles based on creating of dissonant compositions and embedding of hidden words and imagery. So if you you can see what was altered in these images you will also be able to see subliminal messages. If you can't see anything unusual click images to get answers.
Hint: worth 1000 dot com
Hint: say Hi
Hint: I heard some roars
Hint: Logically, Adam should've been like this.
Hint: Vote For Me
Here are some more images I've found on the web.
Hint: The window
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