Failing to ponder? Delusion-prone individuals rush to conclusions

Clin Psychol Psychother. Mar-Apr 2009;16(2):111-24. doi: 10.1002/cpp.607.


Jumping to conclusions (JTC) has been proposed as an aetiological factor involved in the formation of delusions from the earliest stages. A number of researchers have thus shifted their focus to include the study of subclinical populations. Expanding on these studies, 17 delusion-prone and 22 control students completed four versions of the beads-in-a-jar paradigm (including multiple jar variants) to test recent claims regarding JTC's specificity to less ambiguous paradigms with a limited number of jars. Additional measures were administered to tease out a potential mechanism underlying JTC. The delusion-prone group showed a higher JTC bias which proved relatively robust across variants. Task performance was related to degree of self-reported rushing. It is concluded that delusion-prone individuals exhibit JTC, even when confronted with more ambiguous scenarios, potentially as a consequence of feeling rushed.

MeSH terms

  • Adult
  • Attitude*
  • Decision Making*
  • Delusions / psychology*
  • Female
  • Humans
  • Male
  • Surveys and Questionnaires
  • Thinking*