Academic journal article The Journal of Parapsychology

Periodicities TN Archived Card-Guessing Data: Preliminary Report on a Large Database

Academic journal article The Journal of Parapsychology

Periodicities TN Archived Card-Guessing Data: Preliminary Report on a Large Database

Article excerpt

This work was supported in part by a grant from the John Bjorkhem Memorial Foundation.

ABSTRACT: Previous investigations by Spottiswoode have shown that (a) anomalous cognition or ESP is greatly enhanced during a narrow window of local sidereal time (LST), an astronomical measure that indicates which slice of heavens is overhead at that time, and (b) an expected negative correlation between ESP and geomagnetic fluctuation (the ap index) is significantly strengthened during that same window of LST time. Less dramatic effects in the data indicate possible additional periodicities, such as a reduction of scoring during other LST periods. These findings suggest that there may be physical moderators of ESP performance of unknown but possibly celestial or solar/geomagnetic origin. These findings were based on a database of nearly 3,000 trials of free-response data from remote viewing and ganzfeld experiments.

To follow up on these findings the authors drew on the archives of the Duke University Parapsychology Laboratory to compile a database of good-quality, relatively standard ESP experiments that exhibited strong overall evidence of ESP. Sixteen data sets from recognized card-guessing experiments of the 1930s contributed a total of 7,167 runs, mostly from two laboratories. The combined z score for these data is 18.79.

Effect sizes were calculated and plotted in LST space using a sliding 2-hr window as in the previous investigations. Similarly, Spearman's rank correlation was calculated in a 2-hr sliding window and plotted in LST space. …

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