Table 1.

Evaluation results for the intelligibility score and the circularity score. Subjects were asked to rate the circularity and intelligibility of definitions by answering 3 questions. The top and low scoring GO-terms were presented in random order and the score was not visible to the evaluators. Explanation on how to read the results: Q1 – Biol. 1 disagreed with only 6/50 terms that received a high circularity index, whereas he agreed with 49/50 terms, that received a low circularity score. Q2: Biol. 1 classified 49/50 terms that received a high intelligibility and 44/50 terms with a low intelligible index, as "roughly intelligible". Q3: Biol. 1 classified 29/50 terms that received a high intelligibility and 3/50 terms with a low intelligible index, as "fully intelligible".

	Q1: Is the definition not circular, i.e. does the definition provide more information than the term itself?		Q2: Is the definition intelligible, i.e. did you roughly understand the meaning of the GO entry by reading the definition?		Q3: Is the definition intelligible, i.e. are you able to fully understand the meaning of the GO entry without requiring further reading of other sources?
Person score	Circular>	Not Circular	Intelligible	Not Intelligible	Intelligible	Not Intelligible
Biol. 1 – PostDoc	6/50	49/50	49/50	44/50	29/50	3/50
Biol. 2 – PostDoc	1/50	48/50	50/50	22/50	40/50	1/50
Biol. 3 – BSc	1/50	46/50	44/50	49/50	45/50	2/50
Bioinf. – MSc	3/50	46/50	45/50	4/50	48/50	1/50