And concerning the Ganzfeld experiments:
"More recently, Julie Milton (University of Edinburgh) and Richard Wiseman (University of Hertfordshire) did a follow-up meta-analysis on 30 new studies not included in the Bem and Honorton analysis. Scott Lilienfeld reports in one of those CSICOP articles (Skeptical Inquirer, November 1999,
www.csicop.org/si/9911/lilienfeld.html) that those findings "stand in stark contrast to those of Bem and Honorton and raise serious questions concerning the replicability of the ganzfeld findings." In science, replicability is essential. If other scientists can't reproduce your results, chances are they may have been due to some flaw in the experiment rather than a real effect. Milton and Wiseman found a result "which corresponds to essentially chance performance and can most charitably be described as negligible."
http://www.straightdope.com/columns/rea ... xperiments