Is there evidence to support the Dunning-Kruger effect? The well known Dunning-Kruger effect is oft cited as a general explanation for why people with limited expertise overestimate their abilities. Other than the initial research that described this cognitive bias, there seems to be little actual data to support it outside of a sit-down questionnaire or IQ test in a university setting. Driving is a well-known example (i.e. '80% of drivers consider themselves above average') although I note from a previous post, the evidence for the Dunning-Kruger effect in driving is mixed. 

Is there any data to support the Dunning-Kruger in outside of a sit-down test performed by university students?
Yes, there are research showing a relationship between skills and not only "sit down tests". A systematic review by Madmood (2016) found "self-reported and demonstrated information literacy skills" supported the Dunning-Kruger phenomena. Demonstrated information literacy was from derived sources such as "observations, field notes, participant reflexive journals, expert grading of searching tasks, analysis of students’ theses, quizzes, and information related assignments".

References: 

Mahmood, K. (2016). Do People Overestimate Their Information Literacy Skills? A Systematic Review of Empirical Evidence on the Dunning-Kruger Effect. Communications in Information Literacy, 10 (2), 199-213. https://doi.org/10.15760/comminfolit.2016.10.2.24