PROPORTIONALITY: Cognitive Bias

By Staff Reporters

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The proportionality bias, also known as major event/major cause heuristic, is the tendency to assume that big events have big causes. It is a type of cognitive bias and plays an important role in people’s tendency to accept conspiracy theories. Academic psychologist Rob Brotherton summarized it as “When something big happens, we tend to assume that something big must have caused it”.

IOW: Proportionality Bias is the inclination to believe that the magnitude of an event’s cause must be proportional to the event’s outcome. It’s like thinking a huge disaster must have a huge cause. This bias simplifies our understanding of complex situations but often leads to misconceptions. In reality, small causes can have large effects, and vice versa.

Related: https://medicalexecutivepost.com/2022/09/09/accuracy-versus-precision/

And so, to overcome proportionality bias according to colleague Dan Ariely Phd, consider all possible explanations, regardless of their size. Remember: sometimes big things happen for small reasons.

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