# About Rank Psi Test Statistical Calculator

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## Ranked DataThis calculator can be used to analyse data from parapsychological experiments in which data represent rank order judgments of the match between a target and a response. This procedure is widely used in free response ESP experiments in which recorded "impressions" about a possible target are later ranked on the basis of their similarity to a judging set of several possible targets (the actual target plus one or more decoys). The ranking may be done either by the person whose impressions are being examined, or by one or more independent judges. Of course it is vital that when the ranking is done, the actual target is not known by the person making the judgments. If using more than one judge, the rankings from the different judges should be averaged. The average ranks may then be used to determine the majority rank position. The following examples illustrate the procedure.
## Using Ranked Data Psi Test Statistical Calculator## Ranking ProcedureFirst, select the procedure used to rank the data. If a rank of 1 was used to indicate the preferred target, choose "Hit = low rank". If the preferred target was given the top rank (e.g., 4 in the above example), choose "Hit = high rank". ## Number of Targets in Judging SetNext, select the number of targets used in the judging set (this must be the same for all trials). In the above example, this = 4. ## Trials and Sum of RanksNext enter the total number of In the above example, trials = 3, Sum of Ranks = 5 (for one judge), Sum of Ranks = 3 (majority of several judges). ## Statistical AnalysisIf there are sufficient data (at least 10 trials), statistical analysis will be performed. The statistical procedure used is the The z test calculates the probability ( If there is a strong prior expectation of either psi-hitting or psi-missing, the statistical analysis may be carried out on the basis of a |