Wikipedia defines the [
https://en.wikipedia.org/wiki/Streetlight_effect Streetlight Effect] as " . . . a type of observational bias where people only look for whatever they are searching by looking where it is easiest."
In terms of WikiTree, the Streetlight Effect may be most prevalent in dealing with language barriers as, for example, exists for 17th century pioneers born in France who immigrated to Canada.
Since such pioneers of French-Canadian heritage are among the most well researched in world, the Streetlight Effect places some WikiTree users, who might tend to ignore this vast repository of French-based sources in favour of inferior secondary English-based, often on-line private family genealogy sources, at a major disadvantage.
Such major disadvantages should of course have policy implication for WikiTree.
It therefore behooves WikiTree to counter these policy disadvantages.
The fact that solutions to these major policy disadvantages may not be easy to come by does not imply that they should nonetheless not be addressed..