williams@kirk.DEC (John Williams 223-3402) (10/29/85)
About these psi tests: How is the input stimuli randomized? I hope you are *NOT* going to tell me that the experimenter *CHOOSES* something at " random ". John.
davet@oakhill.UUCP (Dave Trissel) (11/02/85)
In article <1138@decwrl.UUCP> williams@kirk.DEC (John Williams 223-3402) writes: >About these psi tests: How is the input stimuli randomized? One method is to use a random event generator (REG). Some run off of a noise diode and some from a radioactive source (Strontium 90 I think is one.) The electronic noise types allow a very high rate of generation - one I was tested on generated 10,000 events a second. Experiments have even been done which tie an atomic type into the electronic type with no difference in results. As far as simple decisions such as choosing randomly which condition will be the target (i.e. on versus off light) a coin toss can be done or random table consulted (in some random way, of course :-) .) -- Dave Trissel {seismo,ihnp4}!ut-sally!oakhill!davet