People with extreme views have trouble thinking about their own thinking (2018)

Fascinating. The paper emphasizes an important distinction: there was no measurable correlation between dogmatism and confidence, but rather between dogmatism and ability to correct one's own confidence in light of new evidence.

From the paper:

In line with our hypothesis, higher values of dogmatic intolerance were associated with reduced metacognitive sensitivity (study 2: β = −0.12, p = 0.032, R2 = 0.01; see Figure 3A), in the absence of any effect on perceptual discrimination performance (study 2: β = 0.02, p = 0.77) and controlling for key demographic variables (i.e., age, gender, education). Importantly, there was also no relation between dogmatism and overconfidence (study 2: β = 0.07, p = 0.26), suggesting a specific reduction in the sensitivity with which confidence tracks performance, rather than a bias in confidence.

Original paper: https://www.cell.com/current-biology/fulltext/S0960-9822(18)...