In her study of mediumship, Dr.
Beischel is very strict and accurate,
applying a quintuple-blind scientific
method, i.e., involving five elements.
Compare this with the double-blind
study, a very well known scientific
method that is used in experiments
with the aim of avoiding bias in the
results induced by two elements: the
placebo effect and the researcher. It
is called “double blind” because the
subjects in the study do not know
to which experimental group they
belo