OK, here is what happened to me. I called up the picture, not knowing anything other than that it was some sort of trick question about the color of the dress. It looked blue-and-black at first and then in a manner of seconds turned white and gold. I stared at it waiting for it to change back, figuring that was the illusion. When it didn’t, I figured that I was immune.
Apparently not. What seems to have happened is that my brain registered the true colors but took a moment to adjust to what it thought the ambient light was like in the photo. At which point it settled on an interpretation that my conscious mind could not undo, even when I saw the truth.
I would be curious to re-run the experiment. If I had known that it was really blue and black, would I have seen that bizarre color shift a few seconds into my stare regardless?
Ah well. The metaphysics are perturbing, so I am going to go back to working on Ecuadorian finances now. Happy viral meme.