Table 7.

The average number of references per final summary assignment.

Run	Average number of references per summary, mean (SD)	P value from t test (df) comparing the difference between the mean in Run 1 with the means in Runs 7 and 8
1	1.8 (1.9)	N/Aa
2	2.1 (2.3)	N/A
3	2.4 (2.7)	N/A
4	2.2 (2.5)	N/A
5	1.7 (2.1)	N/A
6	2.0 (2.0)	N/A
7	2.9 (1.8)	.049 (183)
8	3.5 (2.9)	.001 (186)

^aNot applicable.