Dean Radin discusses a meta-analysis of 88 ganzfeld experiments in his book Entangled Minds: Extrasensory Experiences in a Quantum Reality (Paraview, 2006). Figure 6-6 on page 120 has a graph of the results.
The three-sentence caption is odd. The first sentence seems direct and plausible: “Cumulative average hit rate in the ganzfeld experiments, from 1974 through 2004, with one standard error bar.”
But the third sentence reads: “Each dot represents an experiment and the dates on the x-axis indicate the average year of study publication.” Can these two sentences be reconciled? It seems unlikely that each dot represents one experiment (the variance of the hit rates would be remarkably small). Why would the average year of publication be plotted on the x-axis? What range of years were used for each average?
I perused the book but could find no citation that might lead me to more description.
Before one relies upon Dr. Radin’s claims here, one may wish to seek further details of the meta-analysis.