Lunar phases and crisis center telephone calls

J Soc Psychol. 1990 Feb;130(1):47-51. doi: 10.1080/00224545.1990.9922932.


The lunar hypothesis, that is, the notion that lunar phases can directly affect human behavior, was tested by time-series analysis of 4,575 crisis center telephone calls (all calls recorded for a 6-month interval). As expected, the lunar hypothesis was not supported. The 28-day lunar cycle accounted for less than 1% of the variance of the frequency of crisis center calls. Also, as hypothesized from an attribution theory framework, crisis center workers reported significantly greater belief in lunar effects than a non-crisis-center-worker comparison group.

MeSH terms

  • Adult
  • Crisis Intervention*
  • Hotlines / statistics & numerical data*
  • Humans
  • Louisiana
  • Periodicity*