I originally got that cow/dolphin photo as the punchline in a long joke ..., see if I can find it:
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This is a very sensitive test to determine your occupational stress level from sensory clues.
A very-slightly-modified digital image of one dolphin has been pasted next to the original.
Tests have shown that more-highly-stressed people believe they can detect differences that are actually too subtle for normal people to detect. The numbers of differences that you imagine you can see in these two images accurately reflects your emotional and cognitive stress levels.
Close your eyes briefly and take several calming breaths before opening this JPG to minimize false readings.
0-2 differences - - - - - normal stress level
3-5 differences - - - - - stressed
6-8 differences - - - - - troops in active combat
8-12 differences - - - - - malfunction during carrier landing
>12 differences - - - - - (our current software project)
