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Zener Cards

Click top buttons to play. Standard game is 25 guesses, but can go on for much longer for added challenge. Click "Score" button when finished.
Zener Cards
   ○    +      ≋      □   ☆

Guesses:

 Correct:

            %: 

The significance level is determined by a formula used with the original zener card tests:
<1.96 = no psychic ability.
1.96 - 2.58 = some psychic ability.
2.58 - 3.00 = significant psychic ability.
3.00+ = very signficant psychic ability.
In a standard game of 25 guesses:
Skill Level (Correct: Probability):
Beginner (3 - 7: 79%)
Intermediate (8 - 14: 10.9%)
Advanced (15 - 19: 1 in 90,000)
Expert (20 - 24: 1 in 5 billion)
Impossible? (25: 1 in 300 quadrillion)
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