Abstract

Four experienced female Long-Evans rats were tested in a psychokinesis experiment in which a barpress in an operant chamber initiated a random generator choice. The hit probability was 1 in 10. A food reward was given for hits. Run length was set at 1,000 trials and the number of runs at 5 for each S. The purpose of the study was to replicate an experiment by J. Sandford (1976) which showed inclines within runs under similar conditions. The present experiment gave declines ( p < .05).