Automated Tests for Telephone Telepathy Using Mobile Phones

In 2080 trials with three callers there were 869 hits (41.8%), above the 33.3% chance level (P < 1 × 10−15). The hit rate in incomplete tests was 43.8% (P = .00003) showing that optional stopping could not explain the positive results. In 745 trials with two callers, there were 411 hits (55.2%), above the 50% chance level (P = .003). An analysis of the data made it very unlikely that cheating could explain the positive results. These experiments showed that automated tests for telephone telepathy can be carried out using mobile phones.