There was some discussion in a couple of other threads about the use of pseudorandom numbers in psychokinesis experiments. It's often said that PK experiments need to be done with true random numbers generated by a quantum process, because pseudorandom numbers are deterministic and therefore can't be affected by PK. The counter-argument is that the mind may be able to modify the behaviour of the device producing even pseudorandom numbers, so that the numbers are altered.
My instinctive response was to say that altering the behaviour of a theoretically deterministic system in that way would have to be classed as macropsychokinesis - along with moving visible physical objects - rather than micropsychokinesis - which is how experiments with random number generators are usually described. My instinct was also that macroPK would be in some sense "harder" than microPK.
But that set me wondering about the distinction between the two, and about what the assumption about hardness was really based on.
Of course, J. B. Rhine did PK experiments with dice. And the Princeton Engineering Anomalies Research lab (PEAR), as well as doing many experiments with random number generators, also used a "Random Mechanical Cascade" (RMC) protocol, in which people tried to influence the behaviour of small balls falling through an array of pins. There's an interesting article on the apparatus here:
http://www.cabinetmagazine.org/issues/34/burnett.php
The RMC should be a classical, deterministic system as far as I can see, albeit one that may be extremely sensitive to small disturbances. But apparently people found it no harder to affect the behaviour of that system than they did to affect that of true random number generators. In York Dobyns's survey of the work done at PEAR (published in Broderick and Goertzel, "Evidence for Psi") he gives figures for the effect sizes in different studies, expressed per million bits. For what he describes as "basic REG experiments" (i.e. random number generators) the overall effect size was 0.179, and for the RMC it was 0.182.
That raises the questions of whether there's really any fundamental distinction between microPK and macroPK, and whether quantum indeterminacy really plays an essential role in the phenomenon.
My instinctive response was to say that altering the behaviour of a theoretically deterministic system in that way would have to be classed as macropsychokinesis - along with moving visible physical objects - rather than micropsychokinesis - which is how experiments with random number generators are usually described. My instinct was also that macroPK would be in some sense "harder" than microPK.
But that set me wondering about the distinction between the two, and about what the assumption about hardness was really based on.
Of course, J. B. Rhine did PK experiments with dice. And the Princeton Engineering Anomalies Research lab (PEAR), as well as doing many experiments with random number generators, also used a "Random Mechanical Cascade" (RMC) protocol, in which people tried to influence the behaviour of small balls falling through an array of pins. There's an interesting article on the apparatus here:
http://www.cabinetmagazine.org/issues/34/burnett.php
The RMC should be a classical, deterministic system as far as I can see, albeit one that may be extremely sensitive to small disturbances. But apparently people found it no harder to affect the behaviour of that system than they did to affect that of true random number generators. In York Dobyns's survey of the work done at PEAR (published in Broderick and Goertzel, "Evidence for Psi") he gives figures for the effect sizes in different studies, expressed per million bits. For what he describes as "basic REG experiments" (i.e. random number generators) the overall effect size was 0.179, and for the RMC it was 0.182.
That raises the questions of whether there's really any fundamental distinction between microPK and macroPK, and whether quantum indeterminacy really plays an essential role in the phenomenon.