Table 2.

Mean Quiz Scores based on Puzzle Completion

	Total (n=87)		1st Semester (n=16)		2nd Semester (n=20)		3rd Semester (n=51)
	Completed Assignment	Did not complete assignment	Completed Assignment	Did not complete assignment	Completed Assignment	Did not complete assignment	Completed Assignment	Did not complete assignment
Quiz 1	93.1 n=51	91.7 n=36	96.4 n=14	100 n=2	91.7 n=6	89.3 n=14	91.9 n=31	92.5 n=20
p-value	.77		.93		.90		.78
Quiz 2	98.5 n=65	97.7 n=22	100 n=13	100 n=3	97.1 n=17	83.3 n=3	98.6 n=35	100 n=16
p-value	.64		1.00		.15		.33
Quiz 3	93.4 n=66	97.6 n=21	91.7 n=12	95.8 n=4	95.5 n=19	100 n=1	92.8 n=35	97.9 n=16
p-value	.06		.60		.80		.07
Quiz 4	95.7 n=49	96.4 n=38	95.5 n=11	95.0 n=5	92.4 n=16	90.8 n=4	98.3 n=22	97.4 n=29
p-value	.99		.91		.82		.52
Quiz 5	88.1 n=53	82.6 n=34	94.2 n=12	85.0 n=4	86.0 n=15	82.0 n=5	86.5 n=26	82.4 n=25
p-value	.016		.08		.45		.16
Quiz 6	94.1 n=46	89.9 n=41	97.0 n=11	90.0 n=5	93.3 n=12	80.3 n=8	93.2 n=23	92.6 n=28
p-value	.04		.12		.04		.83
Quiz 7	92.7 n=50	88.7 n=37	94.7 n=11	95.0 n=5	91.0 n=14	82.2 n=6	92.9 n=25	89.0 n=26
p-value	.005		.74		.13		.019
Quiz 8	93.7 n=44	91.7 n=43	94.9 n=11	90.0 n=5	93.0 n=14	82.3 n=6	93.4 n=19	93.8 n=32
p-value	.24		.18		.08		.90
Quiz 9	93.7 n=46	91.8 n=41	94.1 n=9	95.8 n=7	92.3 n=11	88.7 n=9	94.1 n=26	91.8 n=25
p-value	.26		.40		.30		.25
Quiz 10	86.8 n=51	87.4 n=36	85.3 n=10	87.7 n=6	84.9 n=14	77.0 n=6	88.3 n=27	89.9 n=24
p-value	.60		.79		.35		.60
Quiz 11	91.9 n=44	89.9 n=43	87.8 n=7	91.0 n=9	92.5 n=11	82.0 n=9	92.9 n=26	92.4 n=25
p-value	.40		.41		.002		.72
Quiz 12	91.6 n=44	90.5 n=43	89.6 n=10	92.4 n=6	88.1 n=10	84.7 n=10	94.0 n=24	92.3 n=27
p-value	.87		.49		.35		.91
Quiz 13	94.5 n=44	89.9 n=43	97.6 n=10	90.0 n=6	91.3 n=12	88.0 n=8	94.9 n=22	90.3 n=29
p-value	.019		.02		.31		.22
Quiz 14	95.9 n=43	91.2 n=44	97.1 n=11	95.7 n=5	96.0 n=9	92.0 n=11	95.3 n=23	90.1 n=28
p-value	.20		.44		.20		.79