Table 3.

Summary of pre- and postquiz scores^a

Subject area	2003 (n = 75)			2004 (n = 60)			2005 (n = 72)
	Pre	Post	p	Pre	Post	p	Pre	Post	p
Central dogma (10)	59	73	9×10−8	62	85	3×10−11	58	85	1×10−18
Genetic code (11)	50	64	5×10−8	44	70	1×10−12	48	75	9×10−17
Mutation (11)	75	80	3×10−5	75	84	4×10−4	73	84	7×10−9
Protein structure (10)	58	69	3×10−6	61	76	6×10−7	58	78	1×10−12
Metabolic pathway (10)	72	83	1×10−7	69	87	8×10−10	73	86	3×10−7
Total (52)	63	74	1×10−13	62	80	5×10−16	62	81	6×10−24

^a Mean percentage correct on each pre- and postquiz section is shown for 2003, 2004, and 2005 course offerings. The number of possible points for each section is shown in parentheses, with one point allotted for each T/F test question. p values were generated by a one-tailed Student's t test evaluating the difference between pre- and postquiz scores on each section.