Stupid Is As Stupid Does (Notes on the Dunning-Kruger Effect)

I noticed long ago that one of the classic hallmarks or tell-tale signs of stupidity is the failure of a subject to recognise or own up to their own intellectual limitations and to arrogantly believe that they are in fact well-informed and of above average intelligence.  

But what I didn't know, until recently, is that this mix of cognitive misconception and conceit has been closely studied by psychologists and described in detail: the Dunning-Kruger effect refers precisely to the phenomenon wherein idiots cannot accurately evaluate their own capacities or knowledge and suffer from illusions of superiority due to their inability to see what is patently obvious to everyone else; i.e., that they're dimwits.   

Interestingly, the corollary to the D-K effect indicates that gifted people of high ability tend to underestimate or downplay their own competence and mistakenly presume that others can do what they do just as well and just as easily. In other words, intelligent people are often self-effacing and overly generous in their expectations.   

Of course, the fact that fools are often smug and superior in their foolishness had been observed long before Dunning and Kruger formulated their theory in 1999. Poets, philosophers, playwrights and even naturalists such as Darwin have commented on the fact that ignorance more frequently begets confidence than does knowledge.  

But it's Bertrand Russell's remark that has particular resonance today for secularism in the face of religious fundamentalism: "One of the painful things about our time is that those who feel certainty are stupid, and those with any imagination and understanding are filled with doubt and indecision."

See: Kruger, Justin and Dunning, David; 'Unskilled and Unaware of It: How Difficulties in Recognizing One's Own Incompetence Lead to Inflated Self-Assessments', in the Journal of Personality and Social Psychology, Vol 77, No. 6, (Dec 1999), pp. 1121-1134. Click here to read.

See also Bertrand Russell; 'The Triumph of Stupidity', in the second volume of Mortals and Others: American Essays, 1931-1935 (Routledge, 1998), where he argues that the essential cause of trouble in the modern world is that "the stupid are cocksure while the intelligent are full of doubt." Click here to read. 

This post was suggested by Dr Andy Greenfield to whom I am grateful.