Schizotypy, self-referential thinking and the Barnum effect.

Background and Objectives: The tendency for people to endorse, as an accurate description of themselves, personality descriptions that are essentially bogus is well-attested. The study tested whether the so-called 'Barnum' effect could be predicted by individual differences in self-referential thinking, and beyond this, schizotypy more generally.
Methods: 130 Participants completed four different measures of the Barnum effect followed by measures of schizotypy and self-referential thinking.
Results: Both self-referential thinking and positive schizotypy independently predicted the degree of agreement with several Barnum measures including both favorable and unfavorable personality descriptions, as well as computer-generated and horoscope-based readings.
Limitations: The sample is heavily represented by students and is not representative of the general population. Testing at a single point in time may have reduced differences between different indices of the Barnum effect.
Conclusions: Self-referential thinking and schizotypy more generally are key contributors to the Barnum effect across a wide range of indices.
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