sentences:  They then show that ethnographic descriptions of cultural rituals contain around 5 times more of such content than ethnographic descriptions of other activities such as "work".Fiske later repeated similar analysis with more descriptions from a larger collection of different cultures, also contrasting descriptions of cultural rituals to descriptions of other behavioral disorders (in addition to OCD), in order to show that only OCD-like behavior (not other illnesses) shares properties with rituals.The authors offer tentative explanations for these findings, for example that these behavioral traits are widely needed for survival, to control risk, and cultural rituals are often performed in the context of perceived collective risk.