The Open Deck procedure is used when all targets are equally likely to occur on EVERY trial. For example, in ESP card-guessing
experiments, the cards are shuffled, one is selected for guessing and then this card is returned to the pack before shuffling again and selecting the next
The Closed Deck procedure applies when targets are eliminated after each trial. For example, in ESP card-guessing experiments, the cards are shuffled, one is selected for guessing and then put to one side before selecting the next card from the
remaining deck (which may or may not be reshuffled at this point).
Probability of Hit
This is determined by the
number of different outcomes that are possible. For example, in a standard ESP card-guessing experiment there are 5 different cards, so the probability of a
hit is 1 in 5 . In a PK experiment in which people are trying to throw sixes using a die, the probability of a hit is 1 in 6.
Note that this calculator should only be used when the
different outcomes are equally likely to occur.
Trials and Hits
Finally, enter the total number of trials (hits and misses combined) and the total number of hits in the appropriate boxes. Then click "Calculate".
More about this calculator