Abstract

Comments on the debate between C. Honorton (see record 1986-05165-001) and R. Hyman (see record 1986-05166-001) about the evidence for psi in the ganzfeld situation. Their debate was a creative, constructive, and task -oriented dialog that served admirably to sharpen the issues involved. The concept of replication, distinguishing the troublesome older view with a more useful alternative is emphasized. Specific issues related to replication are discussed, including problems of multiple testing, subdividing studies, weighting replications, and problems of small effects. The earlier meta-analytic work is summarized, evaluated, and compared with a meta-analysis of a different controversial area. Rival hypotheses of procedural and statistical types are discussed, and a tentative inference is offered.